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AAW AUTO - A continuous target search mode.

AAW MANUAL - Same as AAW Auto but requiring operator input.

ABSENTEE - Any member not classified administratively as a deserter, who is absent without authority from the unit, organization, or other place of duty at which required to be.

ABSORPTION - Penetration of solid materials or liquids by a foreign substance (such as a chemical agent) without a chemical reaction.

ABORT (ING)/(ED) - Directive/informative to cease action/attack/intercept mission.

ABORT DUSTBIN - I cannot attack with a nuclear ASW weapon but will attack with conventional weapons if possible.

ACTION - Directive to initiate a briefed attack sequence or maneuver.

ACCESS - The actual ability of a person to gain control or knowledge of classified information.

ACCESSMAN - The accessman will open doors, hatches, and clear routes as necessary to provide access to the fire when directed by the scene leader.

ACCELERATION/DECELARATION - The distance a ship would travel when changing speeds, from one steady speed to another.

ACTIVE DESMOKING - Removing smoke and heat from the smoke control zone between the inner smoke boundary and outer smoke boundary before extinguishing the fire, aiding fire-fighting efforts, and reducing smoke spread in the ship. Active desmoking is applied only for fires that involve primarily class ALPHA and class CHARLIE materials.

ACTIVE HOMING - Relies on a transmitter within the weapon to provide the energy source on which the weapon homes.

ACTIVE SONOBUOY - Generates acoustic pulse that reflects off target and is received by an integral receiver.

ACTIVATE/ACTIVE - Radiate (ing) on electronic equipment, specify type if desired.

ACTUAL CURRENT - Current determined by the ship's movement from a DR position to a fixed position.

ACTUAL MOVEMENT - Motion measured with respect to the earth.

ACUTE EXPOSURE - Those in which doses are received in a short time, normally less than 24 hours, as a result of exposure to initial radiation, base surge, or fallout, or combinations thereof.

ACUTE RADIATION DOSE - A dose of ionizing radiation that is received over a period of time that is too short for biological recovery to occur.

ADAMS FACILITATORS COURSE - Five day training for ADAMS for Supervisors course trainers.

ADDRESS INDICATING GROUP (AIG)/COLLECTIVE ADDRESS DESIGNATOR (CAD) - Designators for predetermined lists of frequently recurring combinations of action/info addees.

ADHESION - Is the attraction between the molecules of a substance that tends to cause unlike surfaces to stick together. Adhesion causes a liquid lubricant to stick, or adhere, to the parts being lubricated. A thin layer of oil within the oil wedge adheres to the load and to the surface.

ADMINISTRATIVE BILLS - Day-to-day shipboard routine bills. Some examples include bills for locker inspection, cleaning, general visiting, and zone inspection.

ADMINISTRATIVE BOARDS - Selection boards that make selections that were once made by committees within Naval Personnel Command or the detailer. These include Surface Warfare Major Command, Senior Enlisted Academy Screen, Surface Warfare Department Head Screen and other various boards.

ADMINISTRATIVE SEPARATION - Discharge or release from duty upon expiration of enlistment/service, or prior thereto, in the manner prescribed by the MILPERSMAN (This excludes separation by sentence of a General or Special Courts Martial).

ADSORPTION - Adhesion of molecules of a foreign substance (such as a chemical agent) to the surface of solid materials (including crevices) or liquids without a chemical reaction.

ADVANCE - Distance gained in the original direction of travel until the vessel steadies on her new course; measured from the point that the rudder is put over.

ADVANCE - The distance gained in the direction of the original course from the time the rudder is shifted over.

ADVISORY CONTROL - Aircraft Commander responsible for aircraft navigation; controlling unit issues hazard warnings.

AEROSOL - A suspension of fine liquid droplets or solid particles in a gaseous medium, the particles being small enough to remain suspended for a significant period of time and behave like a vapor; examples of solid particulate aerosols are dust and smoke; common liquid droplet aerosols are perfumes, oil mists, and fog.

AEROSOLIZATION - The physical process of breaking up solid or liquid into small particles or droplets and suspending them in air.

AFFIRM DOWN - I (or ship whose call sign follows) am below 130 feet keel depth.

AFFIRM UP - I (or ship whose call sign follows) am at periscope depth.

AFFF SINGLE-SPEED INJECTION PUMP - Permanently mounted, positive displacement, electrically driven, sliding-vane type of pump.

AFFF SPRINKLER SYSTEM - An AFFF sprinkler system is a subsystem of AFFF generating systems.

AFFF STATION OPERATOR - The AFFF station operator ensures that there is a constant supply of AFFF to the hose team for fire fighting.

AFFF TANKS - The tanks are rectangular or cylindrical in shape and are fabricated out of 90/10 copper-nickel or corrosion-resistant steel. Each service tank is located inside the AFFF station and is fitted with a gooseneck vent, drain connection, fill connection, liquid level indicator, recirculating line, and an access manhole for tank maintenance.

AFFF TRANSFER PUMPS - Permanently mounted, single-speed, centrifugal type, electrically driven pump. These pumps are provided in 360 gpm capacity. The transfer pump moves AFFF concentrate through the AFFF fill-and-transfer subsystem to all AFFF station service tanks on a selective basis.

AFFF TRANSFER SYSTEM - The transfer system can deliver AFFF concentrate to on-station service tanks via a transfer main. The transfer main consists of a large pipe with smaller branch connections interconnecting the AFFF service and storage tanks.

AFFF TWO-SPEED INJECTION PUMP - Designed to meet the demand for either a low or a high firefighting capability. The two-speed AFFF pump consists of a positive displacement pump rated at 175 psi, a motor, and a reducer, coupled together with flexible couplings and mounted on a steel base.

AFTER SPRING LINES - Tend aft from the ship to the pier and control the ship's forward movement.

AFTER WELL DECK - Between the upper deck and the poop deck.

AIC - Air Intercept Controllers vector fixed wing fighter aircraft to engage hostile aircraft.

AIMS - Air traffic control radar beacon system, Identification friend or foe, special Military equipment System.

AIR ACTION MODE - Provides for acquisition and tracking of air targets.

AIR BLAST - The shock wave that is produced in the air by an explosion. The shockwave initially travels outward at a velocity of approximately seven times the speed of sound at high overpressures. It will then gradually slow down to a sonic speed of about 1,000 fps at low overpressures.

AIR BLAST INJURY - Personnel can be picked up and thrown by the blast. They receive their injuries upon landing. The extent of the injuries will depend upon the velocity of the body's movement, the nature of the object with which the body collides, and the nature of impact, whether glancing or solid.

AIRBOARNE ALERT - Combat equipped aircraft are airborne and ready for immediate action.

AIRMAIL IN AIR/SUB - Co-operation, a method used by a shore station to pass a message.

AIR READY - A non-operational mode used when the system is manned and awaiting assignment.

AIR WARFARE COORDINATION and REPORTING NET - Used to coordinate air assets and send/receive data related to air operations.

AIRBURST - A burst where the point of detonation is below an altitude of 100,000 feet, and the fireball does not touch the surface of the earth. Air blast, thermal radiation (heat and light), electromagnetic pulse, and initial nuclear radiation (neutron and gamma rays) are produced around the point of detonation.

AIR CHANGE - The process of introducing a volume of air into a compartment that is equal to the volume of the compartment while simultaneously removing an equal volume. Because of mixing, only 65 percent of the air originally in the compartment is removed in one air change.

AIR CONTAMINANT - A substance or material that is foreign to the normal composition of the atmosphere, usually occurring in the form of aerosols, dusts, fumes, mists, gases, and vapors.

AIR LOCK - A shipboard passageway with a quick-acting watertight (QAWT) door on either end. Only one door is opened at a time to prevent the flow of air from a pressurized part of the ship to an unpressurized area. Air locks are also equipped with fittings to allow purging of contaminated air.

ALARM - Directive/informative indicating the termination of EMCON procedures.

ALCOHOL-AWARE - A four-hour command-level course mandated for all hands within two years of accession that makes sailors aware of the Navy alcohol policy, how to use alcohol responsibly, and the risks of abusing alcohol.

ALCOHOL INCIDENT - An offense punishable per the UCMJ or civilian authority, where in the judgment of the service member's CO, the consumption of alcohol was a contributing factor.

ALCOHOL and DRUG ABUSE (ADAMS) TRAINING - A one-day alcohol and drug abuse training course, mandatory for paygrades E-6 to 0-4.

ALCOHOL and DRUG ABUSE for MANAGER/SUPERVISORS (ADAMS) - A mandated one day training for supervisors and a half-day seminar for managers that provide information on being a role model, preventing abuse, and how to develop, maintain and evaluate effective command drug and alcohol programs.

ALERT - Weapons can be launched, fired or be airborne within x minutes.

ALIDADE - Telescope and a compass used to magnify distant objects and determine their direction.

ALFA CHECK - Request or directive to confirm/verify position of BULLSEYE or other specified point relative to the friendaircraft'sfts position. ("GN 55 ALFA CHECK - 045/20"- i.e. BULLSEYE in use is 20 NM north-east of fighter position).

ALLIGATOR - Automatic computer controlled digital data link between units equipped with computerized tactical data systems (link 11).

ALLOCATED - Engagement status. Reported immediately after track identity and number as "NOT ALLOCATED", "ALLOCATED FIGHTERS" or "ALLOCATED SAM". ALTERNATE Informative or directive call indicating the attacker will attack the alternate target.

ALPHA (A) FIRES - Those that occur in such ordinary combustible materials as wood, cloth, paper, upholstery, and similar materials.

ALPHA PARTICLES - A form of ionizing nuclear radiation consisting of positively charged subatomic particles emitted by some radioactive materials. An alpha particle is identical to the nucleus of a helium atom in mass, structure, and electrical charge but an alpha particle's energy level is higher due to its speed.

ALTERATION - Any change in hull, machinery, equipment or fittings that may necessitate a change in design, materials, number, location or relationship of the component parts of an assembly..

ALTERNATING CURRENT (AC) - An electrical current, which constantly changes amplitude and changes polarity at regular intervals.

ALTITUDE - Height of contact reported in hundreds of feet in three digits (e.g. "Altitude zero zero five" equals 500 feet).

AM CANYON - A designated target has been jammed.

AMERICAN RED CROSS (AMCROSS) MESSAGES - Primarily used to notify personnel assigned to deployed commands of medical urgencies involving member's immediate family; initiated by "chapters" (e.g., local or regional American Red Cross Agency).

AMPLIFICATION (AMPN) - Used when describing single reference; provides amplification of reference it follows.

AMMUNITION - Any projectile or explosive weapon.

AMMUNITION TRANSFER SYSTEM - Moves ammunition from magazine to gun by means of a series of hoists.

AN/ALQ-142 ESM - Provides LAMPS with an electronic emission reception capability.

AN/ASQ-81 (MAD) - LAMPS system using a towed body to localize submarines.

AN/SLA-10B BLANKER - Used by the Electronic Counter Measure/Electronic Support Measure (ECM/ESM) operator to prevent receiver interference from ownship Radio Frequency (RF) emitters.

AN/SLQ-25 NIXIE - Torpedo countermeasures decoy towed behind surface ships as a deceptive countermeasures option against acoustic homing torpedoes.

AN/SLQ-32 - Provides early warning of threat weapon system and targeting platform emitters and targeting information to own ship hard-kill weapons.

AN/SLQ-32(V)1 - Provides Electronic Support (ES) for one RF band, providing warning, identification, and direction-finding of incoming Anti-Ship Missile (ASM) terminal guidance radars.

AN/SLQ-49 - "Rubber Duck" Chaff Buoy Decoy System consisting of inflatable radar-reflecting decoy buoys to seduce radar-guided anti-ship cruise missiles.

AN/SQQ-28 - Sonar signal processing system; part of SQQ-89 USW Combat System; provides classification and targeting data; permits relay of tactical instructions, weapon delivery data, and other processed data.

AN/SQQ-89 - Integrated, real-time, distributed system; contains acoustic and environmental sensors, mission control, contact management, and weapon fire control subsystems, used on all surface combatants.

AN/SRQ-4 HAWKLINK - Digital data link allowing sonar data, imagery, ESM, communications, and radar imagery from airborne sensors to be transmitted to a ship.

AN/ULQ-16 - Precision measurement and analysis equipment that performs automatic or manual analysis of signals to extract fundamental parameters for Electronic Support Measures (ESM) purposes.

AN/WLR-1H - Performs Over-The-Horizon Cued Detection, Classification and Targeting (OTH Cued DC&T), area surveillance, and threat warning.

ANAPROP - Conditions for abnormal propagation of electronic emissions.

ANCHOR(ED) - A heavy object attached to a vessel by a cable or rope and cast overboard to keep the vessel in place either by its weight or by its flukes gripping the bottom. 1. Informative call, involved in a visual fight and unable to leave. 2. Orbit about a specific point; refueling track flown by tanker. Made of cast steel with forged steel fittings and shank weighing 30-60,000 pounds.

ANCHOR BUOY - Used to mark the anchor chain's approximate location if the chain parts.

ANCHOR WATCH - The watchstander maintains a continuous watch on the anchor chain to observe the strain and how the chain is tending.

ANCHOR WINDLASS - Usually horizontal motor, machinery, and rotating drum used to raise and control lowering of the anchor or cargo.

ANEMOMETER - An instrument for measuring relative wind speed.

ANGELS - Height of a Friendly aircraft in thousands of feet. (e.g. "Angels one decimal five" equals 1500 feet, e.g. "Angels decimal five" equals 500 feet).

ANGUS - Bearing of contact determined by submarine.

ANTENNA - Device used to transmit and/or receive radio waves.

ANTI-AIRCRAFT - Produces an airburst in an air target's proximity, types include; High Explosive Variable Time, and High Explosive-Infrared.

ANTI-AIR BATTERY - Designed to combat air targets.

ANTIFLASH CLOTHING - Intended to protect personnel from transient high temperatures that may occur from the use of high explosive weapons and from being burned in a fire. Antiflash clothing consists of an antiflash hood and antiflash gloves.

ANYFACE - GCI/AEW aircraft.

APPARENT POWER - That power apparently available for use in an ac circuit containing a reactive element. It is the product of effective voltage times effective current expressed in volt-amperes. It must be multiplied by the power factor to obtain true power available.

APPARENT SOLAR TIME - Time read from a sundial.

APPARENT WIND - The velocity and true direction FROM which the relative wind is blowing.

APPROACH SHIP - Makes the approach and keeps station on the control ship and usually the receiving ship.

APPROVED (FOR THE PURPOSE) - Equipment or materials that have been tested, evaluated, and determined to be acceptable by a recognized testing laboratory or inspection agency according to the requirements of a particular code or specification for a particular purpose, environment, or application.

AQUEOUS FILM-FORMING FOAM FIRE EXTINGUISHER (AFFF) - Used to provide a vapor seal over a small fuel spill, to extinguish small class BRAVO fires (such as deep-fat fryers), and for standing fire watch during hot work.

AQUEOUS FILM-FORMING FOAM (AFFF) - AFFF, also known as "light water," is a synthetic, film-forming foam designed for use in shipboard fire-fighting systems.

AQUEOUS POTASSIUM CARBONATE (APC) - Are installed in Navy ships to provide protection for galley deep fat and doughnut fryers and their exhaust systems. Aqueous potassium carbonate is specifically formulated to extinguish fire in the reservoirs by combining with the hot cooking oil surface to form a combustion-resistant soap layer, thereby cutting off the grease from its source of oxygen.

ARAMID - Consists of four strands of aramid (wrapped around a core and is similar to wire rope construction.

ARAMID FIBER ROPE - If jacketed cover of any strand is abraded or worn to the extent that inner fibers are visible but not damaged, strand(s) or entire rope may be served with marline or synthetic cord; inner fibers are damaged,line section should be removed; three times more expensive than conventional synthetic mooring lines, and more susceptible to chaffing; when minor chaffing occurs line may be served [Service: Marline or small stuff bound around the circumference of a line for additional chaffing protection].

ARCTIC - Polarization of signal is x.

ARIZONA - No anti-radiation missile ordnance remaining. 3C AS FRAGGED Unit or element will be performing exactly as stated by the air tasking order.

ASBESTOS - Is a progressively worsening disease of the lung and is recognized as a classic disabling or even fatal occupational disease.

ASH CAN - HE depth charge.

ASO - Acoustic Sensor Operator, responsible for detection, tracking, localization, and prosecution of submarines.

ASREP - ASW report.

ASSISTANT AUTHORIZING OFFICER - The individual designated in writing by the ship's Commanding Officer to assist the Authorizing Officer by confirming the adequacy and accuracy of a tag-out.

ASSISTANT BOARDING OFFICER (ABO) - Responsible for actual inspection, positioning team members, team assignments, and assisting Boarding Officer.

ASST Mode - Aircraft mission is to observe, identify, and localize threat platforms beyond parent ship's radar and/or ESM horizon.

ASTAC - ASW/ASST Tactical Air Controller; analyzes and transmits mission essential data to aircraft; controls aircraft when required. Anti-Submarine Tactical Air Controllers deploy rotary and fixed wing aircraft in the detection, localization, classification and engagement of enemy submarines.

ASTERN REFUELING - Similar to alongside refueling; however, the ship sending fuel is in front of the ship receiving fuel.

ASSUME DECK - Carrier prepare deck for possible emergency landing of aircraft as soon a possible.

ASSUMED FRIEND - A track which is assumed to be a friend because of its characteristics, behavior or origin.

ASWE - ASW Evaluator, controls CIC during USW operations.

ATO - Airborne Tactical Officer, responsible for tactical situation, asset use and coordination.

ATHWARTSHIP - The athwartship structure consists of transverse frames and floors and is the crosswise portion of the ship.

ATMOSPHERE - The immediate gaseous surrounding of a particular location or confined space, including normal air plus any air contaminants and oxygen efficiency/excess.

ATMOSPHERIC IONIZATION - An increase in the density of electrons in the atmosphere around a nuclear burst. These electrons affect radio and radar signals by removing energy from the waves.

ATOM - An atom is made up of tiny particles known as electrons, protons, and neutrons. The relative number of these small particles determines the attributes of an element.

ATTACK(ING) - Attack or am commencing attacking run with weapon indicated. Direction/bearing from which the weapon will be coming may be given.

ATTACK TEAM - One or two fully manned hoses, according to NWP 3-20.31.

ATTENUATION - The reduction in the intensity of nuclear radiation as it passes through a substance.

ATTITUDE CONTROL SYSTEM - Directs pitch, roll and yaw, the weapon's attitude in the X-Y-Z planes.

AUTHENTICATE - To request or provide a response for a coded challenge.

AUTOCAT - Any communications relay using automatic retransmission.

AUTO DESIGNATION - Allows the Aegis Weapon System to assign CIWS to a target.

AUTO DETECTOR/TRACKER (ADT) - Automatic target detection and tracking system.

AUTOMATIC BUS TRANSFER (ABT) - Device used to shift power source automatically to maintain power to vital ship equipment.

AUTOMATIC GUNS - Use propellant energy to open the breech, eject empty cartridge cases, and load subsequent rounds.

AUTHORIZATION - One who has authority to conduct a search. Military commanders (COs, OICs, etc.) have the power to authorize a search. This power may not be delegated.

AUTHORIZING OFFICER - The person with the authority to sigh for issuing or clearing tags and labels. Department Heads shall designate Authorizing Officers by billet or watch station.

AUTOMATIZATION - The spraying of a liquid through a nozzle so that the liquid is broken into tiny droplets or particles.

AUTOMATIC OPERATION - Operation of a control system and the process under control without the assistance from the operator.

AUTOMATIC PARALLELING DEVICE (APD) - Device used to parallel generators automatically.

AUTO-IGNITION POINT - The minimum temperature required to initiate self-sustained combustion of a substance independent of external ignition sources of heat.

AUTO-IGNITION/SELF-IGNITION POINT - The lowest temperature to which a substance must be heated to give off vapors that will burn without the application of a spark or flame.

AUXILIARY CIRCUITS - Auxiliary circuits duplicate primary circuits. This helps to minimize the danger of both the primary and the auxiliary circuits being placed out of commission at the same time. An X in front of the circuit designator identifies auxiliary sound-powered circuits.

AUXILIARY CONDENSATE - Condensate from the auxiliary steam system.

AUXILIARY DETONATING FUSES (ADFs) - Safing and arming devices that prevent nose fuSes from detonating until after the fuSes or projectiles are armed.

AUXILIARY EXHAUST - The Auxiliary Exhaust (AE) system provides a means to reclaim the exhaust steam from the non-condensing turbines by reintroducing it to the main steam cycle through the Deaerating Feed Tank (DFT) and the main or auxiliary condensers.

AUXILIARY STEAM - Steam supplied at the pressures and temperatures required to operate many systems and machinery, both inside and outside engineering spaces. The steam leaving the desuperheater is referred to as "auxiliary" steam.

AWAY - Weapon indicated has been fired or released.

AW - Air Warfare is the detection, tracking and identification of air contacts and the engagement of hostile air contacts.

AZIMUTH (oAMPLITUDEDE) METHOD - Measure the gyro bearing of a celestial body with the calculated true azimuth to the body. Two or more groups primarily separated in bearing.

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BACKGROUND RADIATION - Low-level radiation from natural sources in the environment that is always present. The intensity varies in different regions of the world.

BACK STOP - Unit stationed between the contact and the protected Force.

BACTERIA - Very small single-cell organisms, large enough to be visible through an ordinary microscope.

BAF - Back-up Alert Force. The BAF is the secondary response team that musters during Security Alerts onboard ship.

BALANCING VALVE - Automatically proportions the correct amount of AFFF concentrate with seawater. The balancing valve is a diaphragm-actuated control valve that responds to pressure changes between the AFFF concentrate supply line and the firemain.

BALL - ASW helicopter transducer.

BANDIT - An aircraft identified as enemy, in accordance with theatre identification (ID) criteria. The term does not necessarily imply direction or authority to engage.

BAND WIDTH - The difference between the lowest and highest frequencies transmitted through an analog channel.

BANZAI - Informative/directive to execute launch and decide tactics.

BARBETTE - Provides structural support for the entire radar-weapon assembly.

BARREL - Consists of a tube and liner that houses projectiles and propelling charges in the breech end; confines propellant gases and imparts rotation to the projectile upon firing.

BARCAP - Barrier Combat Air Patrol.

BARK(ING) - Underwater interrogation/reply transmissions.

BARRIER - Set up barrier as indicated (e.g., sonobuoy axis position).

BASE - After end of the projectile that can hold a detonating fuse.

BASE (Number) - Reference number used to indicate such information as headings, altitude, fuels, etc.

BASE DETONATING FUSES (BDFs) - Contact fuses that have a delay of a few thousandths of a second to allow penetration prior to detonation.

BASE COURSE - The signaled course of the guide ship.

BASE SPEED - The signaled speed of the guide ship.

BASE SURGE - Is from an underwater burst and is a rapidly expanding cloud or mist of water droplets. This cloud is produced by the collapse of the water column that was thrown up by the underwater detonation.

BASSET - Rocket thrown torpedo.

BATHYMETRIC NAVIGATION - The art of establishing a geographic position on the open sea by using the ocean floor's geological features.

BATTLESPACE - All aspects of air, surface, and subsurface, land, space, and the electromagnetic spectrum that encompass the area of influence and area of interest. (NWP 1-02).

BATTLE BILL - The ship's Battle Bill is tailored to your ship for battle organization. You may need to provide information to the operations department when it is updated.

BATTLE DRESSING STATIONS - Most ships have a minimum of two-battle dressing stations equipped for emergency handling of personnel battle casualties. Each battle dressing station must be accessible to the stretcher-bearers from repair parties within the vicinity. Medical department personnel as assigned by the senior member of that department should man each battle dressing station.

BATTLE LANTERNS - Provided throughout the ship for emergency lighting whenever normal lighting is unavailable.

BATTLE TELEPHONE CIRCUITS - The battle telephone circuits are sound-powered circuits. Therefore, they require no outside source of electrical power. The transmitter of a sound-powered telephone transforms sound waves into electrical energy. The receiver transforms this electrical energy back into corresponding sound waves.

BAY - Carry out deception plan indicated or in accordance with previous orders.

BAY RUM - Hostile chemical attack (e.g. Warning Bay Rum).

BEACON VIDEO PROCESSOR (BVP) - Detects and automatically tracks air contacts squawking mode II, and emergency responses in all modes.

BEADWINDOW - Your last transmission disclosed an essential element of friendly information.

BEAMING (direction) - Description of the bogey/bandit maneuvering to position the fighter approx. +/- 30° of the bogey/bandits 3/9 line ("RED 2 contact, beaming south").

BEANSTALK - Information call advising JTIDS users to check equipment for spurious tracks.

BEARING - Direction of an object from observer expressed in terms of compass points or degrees.

BEARING CIRCLE - Used to obtain the bearings of other ships; determines relative motion and finds the bearing of any object.

BEAVER - Link 14.

BEELINE - A method of bearing investigation by an MP aircraft commencing on top of the ASW submarine.

BELLY CHECK - A momentary unloaded bank to check the blind side of a turning aircraft.

BENT - Equipment indicated is inoperative (Cancelled by OKAY).

BENDER - Employ convergence zone detection techniques or contact believed convergence zone detection.

BENDING SHACKLE - Attaches anchor to chain; part of the outboard swivel shot.

BENDING SHOT - Used to stop off the anchor in hawse pipe allowing chain to be disconnected.

BERTHA - AEW search radar equipment.

BETA PARTICLES - A form of ionizing nuclear radiation consisting of negatively charged subatomic particles emitted by some radioactive materials. A beta particle is a high-speed electron. The mass and electrical charge of a beta particle is the same as those of an electron but a beta particle's energy level is higher due to its speed.

BEWARE BEWARE - The cautionary report made by an ASROC-fitted ship or a nuclear ASW weapon delivery aircraft about 30 seconds prior to weapon firing/release.

BIF(Bomb in face) - Informative or directive call to indicate dropping a bomb as a defensive action ("Blue lead, BIF").

BIG BERTHA - AEW search radar transmitter.

BIG DIPPER - Radar and sonar fitted helicopter.

BIG JOE - AEW identification equipment.

BIG PHOTO - All bomber and reconnaissance aircraft employing ECM.

BIGHT - Slack part of a line or chain, particularly when curved or looped.

BINGO - 1. Fuel state needed for recovery. 2. Proceed/am proceeding to specified base (field) or carrier.

BINGO FIELD - Alternate airfield.

BIRD - Friendly surface to air missile.

BIRD(S) AFFIRM HOSTILE - Missile radar is locked on designated target.

BIRD(S) AWAY HOSTILE - Missile has been fired on designated target.

BIRD(S) NEGAT HOSTILE - It is not possible to fire at specific Hostile.

BIRD TARGET - Used by the AAWC to designate a target to be engaged.

BIRDIE - Aircraft radio relay of sonobuoy information. May be amplified by MATED signature received and correlates. UNWED signature deceived and does not correlate.

BITTS - Heavy vertical cylinders, usually arranged in pairs, that are used to make fast or secure lines that have been led through chocks.

BITTER - Anti-Surface Ship Missile state report.

BITTER END - Free end of a length of line, wire, chain or cable.

BLACK - No lights to be visible.

BLACKOUT - Disruption of electronic emissions from radio and radar after a nuclear weapon explosion. It is caused by changes in atmospheric ionization.

BLANK - A SEAD aircraft does not detect any emitters of interest.

BLAST WARHEADS - Causes damage by instantaneously generating shock waves up to 200,000 times greater than normal atmospheric pressure.

BLIND - Informative call indicating that an aircraft has lost visual contact with another friendly aircraft or ground position (opposite of visual).

BLISTER - An enclosed bulging bubble-like projection (as in paint) that may be filled with a liquid (saltwater or solvent) or a gas (air). Blisters can occur in any painted tank (that is, JP-5, gasoline) due to improper painting procedures, such as poor ventilation during application and curing or incomplete surface preparation. Broken blisters must be repaired because of potential for occurrence of rusting.

BLISTER AGENTS - Chemical agents that affect the eyes and lungs and blister the skin, producing long-term incapacitation or death. Blister agents are odorless and vary in duration of effectiveness. The primary blister agents, HD and HN, are most effective for general use.

BLOOD AGENTS - Chemical agents that enter the body through the respiratory tract. Most blood agents act rapidly and are normally nonpersistent. In general, a victim who does not die quickly will recover within a few hours.


BLOODHOUND LOOSE - I have launched an ASW torpedo in this area (or area indicated); keep clear.

BLOTTER - ECM receiver.

BLOW THROUGH - Directive or informative call that indicates aircraft will continue straight ahead at the merge and not turn with target(s).

BOARDING - Boarding starts after helicopter verifies crew count and visually inspects ship for weapons; boarding inspection performed and recommendations for vessel disposition determined; determination recorded in ships deck log; VBSS departs.

BOARDING OFFICER (BO) - Responsible for boarded ships inspection, team conduct, document examination, and communications; recommends whether vessel can proceed or should be detained.

BOARDING SHIP PRESENTATION - Man weapons to cover boarding party; launch support helicopter, launch boat to transport VBSS.

BOILER LOAD - The steam output demanded from a boiler, generally expressed in pounds per hour (lb/hr).

BOGEY - Unidentified aircraft.

BOGEY DOPE - Request target information (BRG/Range) to the specified target. If a threat is not specified BRG/Range will be given to the closest threat.

BOLLARD - A strong upright cylindrical on a pier, around whicthe eyeye or bight of a ship's mooring line is placed.

BODY - Main part of the projectile; contains high explosive, pyrotechnic, or sand filler.

BOLO - Line with a lead weight attached to a shot line that is heaved over to the receiving ship in daylight.

BOOST PHASE - The phase when the weapon accelerates to flight speed.

BOOSTERS - Used by several surface missile systems to attain initial flight velocity.

BORE - Rifled interior of the barrel; has a constant diameter from breech to muzzle; raised surfaces of the rifling are called lands, and lowered surfaces are grooves; bore diameter is measured from land to land.

BORE EROSION - Deterioration of the gun bore surface by repeated firings.

BORESAFE - Prevents arming until the projectile is a safe distance from the gun bore after firing.

BOTTOM CONTOUR - The configuration of the ocean floor.

BOUNCER - Employ bottom bounce detection techniques or contact believed bottom bounce detection.

BOUNDARY (SPACES) - The outermost border or limit immediately surrounding a confined space, above, below, and on all sides, such as the outside walls of a fuel tank.

BOURRELET - Supports the projectile's forward portion by acting as a bearing surface as it travels through the bore of the gun.

BOW LINE - Secures the ship's bow to the pier.

BOWWAVE - Long form weather report giving: (See also VAT"B") B. - Below or Base of cloud in thousands of feet. If below one thousand feet, use hundreds of feet but add the word "hundred". O. - Over or Top of cloud level in thousands of feet. If unknown, use the word "UNKNOWN". NOTE If there is more than one cloud layer, report the base and top of the lower formation, followed by the base and top of progressively higher layers (e.g. two, twelve, seventeen, twenty-five). W. - Wind. (8 points, N, NE ,E, SE, S, SW, W, NW) plus the velocity in knots. When wind is missing, omit or use the word "UNKNOWN". W. - Weather. General description of weather in plain language; such as clear, partly cloudy, cloudy, overcast light, moderate or heavy rain, mist, haze, thunderstorm and distant-lighting. Amplification of the weather should be made at the end of the report under "E". A. - Amount of clouds in eighths. V. - Visibility in miles. Use a fraction if less than one mile. E. - Extra phenomena of significance such as turbulence icing, heavy sea or swell and description of front. This is an elaboration of the report which includes anything of interest in plain and concise language.

BOX - Groups/contacts/formations in a square or offset square.

BOX PATCH - Effective for use over holes that have jagged edges projecting inboard.

BRAA - Tactical control format providing target bearing, range, altitude and aspect, relative to a friendly aircraft.

BRACKET - Indicates geometry where aircraft will maneuver to a position on opposing sides, either laterally and/or vertically from target(s).

BRAIDED LINES - Most common and strongest type of fiber line construction.

BRAVO (B) FIRES - Those that occur in the vapor-air mixture over the surface of flammable liquids, such as gasoline, jet fuels, diesel oil, fuel oil, paints, thinners, solvents, lubricating oils, and greases.

BREAK (BT) - Signifies the break between the message header and the message body.

BREAK (Direction) - Perform "An immediate maximum performance turn in the direction indicated".

BREAK(ING) - DIP Helicopter raises the transducer clear of the water.

BREAK AWAY - Tanker or receiver call indicating that an immediate disconnect and vertical and nose or tail separation between tanker and receiver is required.

BREAK OFF - Discontinue approach but maintain contact unless otherwise indicated.

BREAST LINES - Run at near right angles to the keel and control the ship's distance from the pier.

BREECH - The end through which the gun is loaded, which is opened for loading and sealed off for firing by means of a breechblock.

BREECH MECHANISM - Movable block that closes off the after end of the gun for firing; contains the firing mechanism that contacts the primer in the base of the propelling charge to initiate the explosive train.

BRIDGE - Pulse width in microseconds.

BRIDGE-to-BRIDGE - The circuit between the bridges of each ship; manned by a bridge-to-bridge (B/B) phone talker; information passed concerns emergency breakaway procedures, tensioning and de-tensioning requirements, and ship control.

BRIDGE-to-BRIDGE (RADIO) - Used prior to the approach phase and during the replenishment to pass emergency information.

BRIGHT - No restrictions imposed on the use of illumination.

BRINE - The concentrated liquid that remains when seawater is boiled; sometimes called blow-down when it is removed from the distilling plant.

BROADCAST - Request/directive to switch to broadcast control.

BROADCAST CONTROL - Tactical/target info is passed to enable the aircraft to accomplish its (their) task. The controlling unit, when possible, provides adequate warnings of hazard, but the aircraft commander(s) is (are) responsible for aircraft navigation and collision avoidance.

BROADCAST FILE - Used to file messages that are received off of the fleet broadcast.

BROADCAST MODE - Continuous broadcast of a series of data transmissions.

BROADCAST NOTICES to MARINERS - Transmitted by Coast Guard (and occasionally Navy or commercial) stations to provide information of a local or temporary nature.

BROKE LOCK - Loss of radar/IR lock-on (advisory).

BROTHER - Attacking ship of surface ASW-unit.

BROWNIE - Photographic devices.

BROWN BAND - Enough explosive to cause the ammunition to function as a low order explosive.

BRONZE - Dummy/drill/inert ammunition used for handling and loading training.

BRUISER - Air Launched Anti Ship Missile.

BRUSH - Antenna rotation rate in seconds per revolution. (SPR).

BUBBLE - I am (or submarine is) releasing an air bubble for identification, localization or evasion purposes.

BUDDY LOCK - Informative call indicating that a fighter has radar locked another friendly aircraft.

BUDDY SPIKE - Informative call of a RWR indication of a friendly AI-radar lock-on ("RED 3, buddy spiked, BULLSEYE 240/15").

BUFFER ZONE - The area between the inner and outer smoke boundaries established for a class BRAVO fire in a machinery space.

BUG OUT (direction) - Separation from that particular engagement/attack/operations; no intent to re-engage/return.

BUILT-IN TEST EQUIPMENT (BITE) - Provides on-line monitoring of critical functions, a centralized system for remote test point selection and access, and external test points for connection of support equipment.

BULKHEADS - Vertical walls that run both transversely and longitudinally through the interior of a ship which divide it into compartments.

BULLDOG - Surface/Sub-surface Launched Anti Ship Missile.

BULLNOSEe - Normally centerline, forward-most closed chock.

BULLPEN - A submarine generated search area. (SGSA).

BULLRING - Aircraft patrol zone.

BULLY - Concentrate attack on my target or target designated.

BULLS EYE - Descriptive call indicating a common reference point. Position of an object will be established by bearing (Magnetic) and range (NM) from this point.

BULWARKS - Solid fencing along the gunwale of the main (weather) deck.

BUMP/BUMP-UP - A fly-up to acquire LOS to the target or laser designation.

BUSTER - Informative or directive call to fly at maximum continuous speed (mil power).

BUTTON - Radio channel setting.

BUZZARD - Missile used in the land attack mode.

BUOYS - Unmanned floating devices anchored to the sea floor.

BUOYANCY - The ability of an object to float.

BUREAU of NAVAL PERSONNEL (BUPERS) - Responsible for assignment control of all designated strikers, non-commissioned officers (chiefs and petty officers), and officers.

BUS - An insulated power conductor (a bar or wire) usually found in a switchboard.

BUS TIE - Bus ties can be closed to interconnect ship service switchboards so that one switchboard can feed power from its generator to one or more of the other switchboards. Bus ties can also connect two or more switchboards together to parallel their generator plants.

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C2 CANISTER - The canister used as part of a protective mask for CB warfare.

CAKE - ASW weapon state report.

CALCIUM HYPOCHLORITE - The standard shipboard decontaminant for chemical and biological agents.

CALIBER - Bore diameter, measured from land to land.

CAINS - Used to load alignment and waypoint data to aircraft computer prior to takeoff.

CANARY - "I" - transponder.

CANCEL TRACK - Track indicated in message has been cancelled.

- Taking parts from one system to restore a casualty in another system.

CAN BUOYS - Cylindrical shaped, unlit, primarily green.

CANCEL CASREP (CASCAN) - Submitted upon commencement of an overhaul or other scheduled availability period when equipment, which has been the subject of casualty reporting, is scheduled to be repaired.

CANDLE - Unit used as illuminator in a HAG.

CANDLES - Night illumination devices.

CANDY - Ammunition state report.

CANISTER (AIR PURIFYING) - A container with a filter, absorbent or catalyst, or any combination thereof, which removes specific contaminants from the air drawn through it.

CANISTER (OXYGEN-GENERATING) - A container filled with a chemical that generates oxygen by chemical reaction.

CANYON - Use electronic jamming on radar frequency indicated or in accordance with previous orders.

CANYON AFFIRM - Designated track is being jammed by this units (or unit indicated). CAP/CAPPING (Location) 1. Directive call to establish an orbit at a specified location. 2. An orbit at a specified location.

CAP TARGET - Used by the AAWC to indicated that a target is primary target for CAP.

CAPSTAN/GYPSY HEAD - The drum usually on vertical machinery units around which lines are passed to provide assistance in hoisting weights, including anchors, or taking a strain on lines.

CAPTAIN'S MAST - In the Navy, nonjudicial punishment proceedings are referred to as "Captain's Mast" or simply "mast." The basis of Captain's Mast is Article 15, UCMJ. Mast is not, in a legal sense, a trial (it is nonjudicial), punishment is not a sentence, and a "finding of guilt" is not a conviction.

CAPTURED - Aircrew has identified and is able to track a specified A/G target with an onboard sensor.

CARBON DIOXIDE (CO2) - An effective agent for extinguishing fires by smothering them and also produced by a fire when there is complete combustion of all of the carbon in the burning material. CO2 is a colorless and odorless gas.

CARBON DIOXIDE (CO2) FIRE EXTINGUISHER - Used on small electrical fires (class CHARLIE) and has limited effectiveness on class BRAVO fires.

CARBON DIOXIDE (CO2) HOSE-AND-REEL SYSTEM - Consists of two cylinders, a length of special CO2 hose coiled on a reel, and a horn-shaped nonconducting nozzle equipped with a second control valve.

CARBON MONOXIDE (CO) - A colorless, odorless, tasteless, and nonirritating gas. However, it can cause death even in small concentrations.

CARDINAL SYSTEM - Buoys used to mark the geographic relationship of a hazard, i.e. north, south, east, or west.

CARGO DROP REEL - Provided by the delivery ship; used to lower a load from a trolley on a tensioned highline.

CARRIAGE - A rotating mounting base for gun deck components; comprised of two assemblies.

CARRIER AIRCRAFT INERTIAL NAVIGATION SYSTEM - Part of Link-4A used to load alignment and waypoint data into aircraft computers prior to takeoff.

CARTRIDGE CASE - Contains the primer and propellant charge.

CASUALTY - An equipment malfunction or deficiency which cannot be corrected within 48 hours and which reduces the ship's ability to perform primary and secondary missions.

CASUALTY EXPOSURE - The total gamma exposure that the commanding officer has established to identify radiological casualties; once an individual's accumulated exposure has reached this level, that person cannot be assigned duties involving additional radiological exposure without command approval.

CASUALTY REPORTS (CASREP) - Provides an expeditious means of reporting a diminished combat readiness posture due to a significant equipment malfunction.

CASUALTY POWER - Temporary power provided to ships vital equipment and systems when battle damage occurs to the normal electrical distribution system.

CASUALTY POWER SYSTEM - One of the most important shipboard damage control systems. The system is a simple electrical distribution system. It is used to maintain a source of electrical power for the most vital machinery and equipment needed to keep the ship afloat or to get the ship out of a danger area. The casualty power system is intended to provide power during real emergencies only. It must NOT be used as a means of making temporary routine repairs.

CASUALTY - A person unavailable for duty because of injuries.

CAUTION TAG - A caution tag is a yellow tag used as a precautionary measure to provide temporary special instruction or to indicate that unusual action must be exercised to operate equipment.

CAVOK - Cloud and Visibility Okay (ICAO term meaning no significant clouds below 5,000 feet, visibility at least six miles, no precipitation or storms).

CDO - The Command Duty Officer is responsible for the safety of the ship and crew in the Commanding Officer’s absence.

CEASED - Subject emitter has stopped radiating.

CEASE ENGAGEMENT - In air defense, break the engagement on the target specified and prepare to engage another target. Missiles in flight will continue to intercept.

CEASE FIRE - Do not open fire/cease firing (missiles in flight continue to intercept).

CEASE FIRE ALARM - Sounded to order gun crew to stop fire; can be activated from Gun Plot or WCS.

CEASE REPORTING - Information on the contact is no longer to be reported, but plotting and assessment of classification, course, speed, altitude, identification and closest point of approach is to be continued. Reporting is to recommence automatically for changes in classification or alterations of course, speed or altitude.

CEILING LIMIT - Concentration of a substance above which personnel should not be exposed, even instantaneously.

CELESTIAL NAVIGATION - The art of determining position or plotting a course by observing celestial bodies (sun, moon, planets, and stars).

CELESTIAL SPHERE - An imaginary sphere surrounding the earth with its own poles and equator that are extensions of the earth's poles and equator.

CELESTAIL TRIANGLE - This is formed on the celestial sphere by the great circles connecting the elevated pole, zenith of the assumed position of the observer, and a celestial body.

CENTER OF BUOYANCY - When a ship is floating at rest in calm water, it is acted upon by two sets of forces: (1) the downward force of gravity and (2) the upward force of buoyancy. The force of gravity is a resultant or composite force, including the weights of all portions of the ship's structure, equipment, cargo, and personnel. The force of gravity may be considered as a single force, which acts downward through the ship's center of gravity (G).

CENTER OF GRAVITY - -The point at which all the weights of the unit or system are considered to be concentrated and have the same effect as that of all the component parts.

CENTIGRAY (cGy) - An international unit of measure for absorbed radiological dose, used by other U.S. military services and allies; equivalent to a rad. One roentgen of exposure to gamma radiation results in an absorbed dose of approximately one cGy.

CENTRIFUGAL FORCE - Movable parts move outward due to projectile spin.

CERTSUB - Contact classified as certain submarine.

CHAFF - Call indicating chaff has been detected or to deploy chaff.

CHAIN - Made of die-lock or high strength welded steel stud links (studded links are those with a solid piece forged in the center).

CHAIN of COMMAND - The succession of commanding officers from a superior to a subordinate through which command is exercised. (Joint Pub l-02) Combatant command: One of the unified or specified combatant commands established by the President. (Joint Pub l-02).

CHAIN LOCKER - Space where the anchor chain is stowed.

CHAIN MARKINGS - Color coded detachable links, and adjacent links that allow quick determination of how much chain is payed out.

CHAIN PIPE - Opening on deck through which the anchor chain is passed to the chain locker.

CHAIN STOPPERS - Hold anchor taut in the hawse pipe; hold anchor when the chain is disconnected.

CHAIN STOPPER - Used to secure the chain and anchor.

CHAIN SWIVEL - A link attached on both ends; minimizes kinking or twisting of the anchor chain.

CHAFF - Lightweight strips of aluminum foil that reflect threat missile radar seekers.

CHALLENGE - Accomplished by the use of an interrogator unit; employs a challenge and reply technique to distinguish friendly platforms in a multi-target environment.

CHALKTEST - A simple means of determining if the gasket is in continuous contact with the knife-edge when a closure is dogged.

CHAMBER - Holds the propelling charge.

CHAMP - Carrier based ASW fixed wing aircraft capable of both search and attack.

CHAMPAGNE - An attack of three distinct groups with two in front and one behind.

CHANGING PORT/STARBOARD - Contact is altering course (port/starboard).

CHARLIE - Land aircraft.

CHARLIE (C) FIRES - Fires that occur in electrical wiring or equipment.

CHART - Naval name for a map that contains navigation information.

CHART NUMBER 1 - Identifies symbols and abbreviations used on navigational charts.

CHARTER - Activate daily changing call signs ordered for current period (or key card indicated) at (time indicated).

CHARTERED DEPTH - Depth of water from the reference plane to the bottom.

CHATTER - Communications jamming.

CHATTERMARK - Commence briefed radio procedures to counter communication jamming.

CHECK ( ) - Directive to momentarily monitor (specified items/systems). No response is required if status is normal.

CHECK PORT (LEFT)/STARBOARD(RIGHT) - Turn (x) degrees left/right and maintain new heading.

CHECK SQUAWK/FOUR - Ensure emitting current crypto period key setting.

CHECKSIGHT - Used to verify gun is pointed in a safe direction or is on target.

CHEMICAL AGENT POINT DETECTOR SYSTEM (CAPDS) - The CAPDS is a local sampling detection device. It is used to detect the presence of chemical agents in the air.

CHEMICAL AGENTS - Agents that produce harmful physiological reactions when applied to the body externally, inhaled, or swallowed. Most military chemical agents cause disorganization of the functioning of the body.

CHEMICAL AND BIOLOGICAL (CB) WARFARE - To deny entry or neutralize contamination so the mission of the ship can be carried out without endangering the life or health of assigned personnel.

CHEMICAL PROTECTIVE ENSEMBLE (CPE) - The combination of all individual chemical protective equipment including suit, boots, gloves, and mask.

CHEMICAL PROTECTIVE OVERGARMENT - The chemical protective overgarment (CPO) is made of material that is permeable to water vapor; that is, it allows the escape of moisture from perspiration. The function of the CPO is to protect the wearer from threat levels of chemical agents in liquid form and from the associated vapor.

CHEMICAL, BIOLOGICAL, AND RADIOLOGICAL (CBR) BOUNDARY - A physical barrier that isolates an area not protected against CBR contamination from an area that is protected against CBR contamination.

CHEMICAL, BIOLOGICAL, AND RADIOLOGICAL (CBR) DEFENSE BILL - The CBR Defense Bill constitutes the hull-specific application of doctrinal concepts and technical procedures.

CHICKS - Friendly aircraft.

CHIT - Refers to a letter, note, voucher or receipt.

CHOKING AGENTS - Choking agents, sometimes called lung irritants; primarily injure the respiratory tract, which includes the nose, the throat, and particularly the lungs where it causes pulmonary edema. In extreme cases, membranes swell, lungs become filled with liquid, and death results from lack of oxygen; thus, these agents choke an unprotected man. Fatalities of this type are known as "dry-land drownings."

CHOCKS - Heavy metal fittings with smooth surfaces and inward curving jaws through which mooring lines are led.

CHOP - Term used to describe when a ship transitions from one operational commander to another (INCHOP/OUTCHOP).

CHOPS - Term used to describe when the ship transitions from squadron to fleet commander.

CHOPPED - Wires from causeway secured to main deck (of LST) on launching have been chopped.

CHRONOMETER - A very accurate clock for measuring time. Used at sea to determine longitude.

CHRISTMAS TREE - Directive to briefly turn on exterior lights to enable visual acquisition.

CIC CONSOLES - Displays sensor information and is an input device to the computer.

CINDER - Off board infrared decoy.

CIPHER - UHF/HF voice encrypt/decrypt device.

CIRCLE WILLIAM - The material classification of openings and ventilation systems between the interior of the ship and the outside atmosphere that are secured to minimize the penetration of nuclear fallout, chemical agents, or biological agents.

CIRCLE XRAY - Fittings marked with a black X inside of a black circle. These modified closures are secured during conditions XRAY, YOKE, and ZEBRA.

CIRCLE YOKE - Fittings are marked with a black Y inside of a black circle. These modified fittings are secured during conditions YOKE and ZEBRA.

CIRCLE ZEBRA - Fittings are marked with a red Z inside a red circle. These modified fittings are secured during condition ZEBRA. CIRCLE ZEBRA fittings may be opened with the commanding officer's permission during prolonged periods of general quarters.

CIRCUIT - A means of two-way communication between two or more units.

CLAM - Cease all or indicated electromagnetic and/or acoustic emissions in accordance with national instructions and exercise orders. Potential intelligence collector(s) (PIC) in area (or in area) (estimated duration of CLAM hours).

CLANKING - Cavitating or making machinery noise.

CLARA (maritime) - Radar scope is clear of contacts other than those known to be friendly. (air) Informative call indicating the radarscope is clear of enemy contacts ("BLUE 1, contact, BULLSEYE 270/20, BLUE 2, CLARA").

CLASSIFICATION - Original classification. The program manager determines what information in the program requires protection and to what level derivative classification - The document's drafter has included classified information that is discussed in one of the classification guides.

CLASSIFICATION LINE - Identifies the overall classification of the message.

CLEAN (maritime) - Broadcast is encrypted. May be used as a report or order and must be followed by a frequency or station designator. (air) No radar contacts on bandits, bogies or aircraft of interest. No visible battle damage. Aircraft not carrying external stores.

CLEARED - Requested action is authorized (no engaged or support roles are assumed).

CLEARED HOT - Ordnance release is authorized.

CLEARED DRY - Ordnance release is not authorized.

CLEARANCE - The administrative determination that a person is eligible for access to classified information CMS Custodian Responsible for the receipt, custody, accountability, and distribution of all COMSEC material (e.g., crypto equipment, key cards).

CLEAR HAWSE PENDANT - A strong pendant used to clear a hawse; usually consists of a wire rope tailed with 5 to 15 fathoms of chain and fitted with a pelican hook.

CLEARING CHARGE - Used during misfire procedures to clear a foul bore; uses a reduced size cartridge case for easy emergency handling.

CLEAT - Pair of projecting horns for securing a line.

CLIFF - Jamming signal.

CLOAK - Directive/informative switch from normal external lighting to covert NVD only compatible lighting.

CLOSE CONTROL - The aircraft is continuously controlled, for altitude, speed and heading, to a position from which the mission can be accomplished.

CLOSED CHOCKS - Chocks closed by a metal arch across the top .

CLOSED LOOP RADARS - Operates by tracking both the target and projectiles fired at the target.

CLOSURE SYSTEM - Protects the interior of the ship against the entry of aerosols and gases.

CLOSEST POINT of APPROACH (CPA) - Closest range that a maneuvering ship and reference ship will come to in respect to each other.

CLOWN - Deception jammer.

CLUTCH - Is a form of coupling that connects or disconnects the engine to the Main Reduction Gear (MRG) power train to rotate the propulsion shaft.

COASTAL CHARTS - Use scales between 1:150,000 and 1:50,000 and are normally used for navigation inside outlying reefs and shoals.

COBRA - ASW-torpedo with Gyro Angle Snake Search (GASS) facility.

COBRA LOOSE - ASW-torpedo with Gyro Angle Snake Search (GASS) released and running on heading x.

COCKROACH - Hostile biological attack, as designated (e.g. Warning Cockroach).

COFFERDAM - A protective space or shell surrounding a gasoline storage tank and filled with an inert gas, such as nitrogen or carbon dioxide.

COIL - Neat series of loops or circles, usually used for storing.

COHESION - Is the attraction between the molecules of a substance that tends to hold the substance together. Cohesion causes a liquid lubricant to hold together and enables it to resist breakdown under extreme pressure. Oil in the wedge must be cohesive so as to not breakdown under the pressure in the trailing edge of the oil wedge.

COLD WEATHER BILL - The Cold Weather Bill is used to prepare the ship for cold weather operations.

COLD (maritime) (air) - I have lost sonar contact or sonar contact is not held.
(a) Start of the CAP leg away from the threat.
(b) Low Attack geometry will result in a pass or roll out behind the target. Threat group heading away from fighters.

COLD PIPE - Stop snorkeling or I am not snorkeling.

COLD WORK - Operations that involve only inspections, cleaning, or minor repair where no hot work will be conducted. Examples are space inspections, spray painting, chemical cleaning, and the use of any strippers, thinners, paints, or cleaners that produce vapors. COLLECTION, HOLDING, AND TRANSFER SYSTEM (CHT) - The system for handling sewage and wastewater.

COLLECTIVE PROTECTION SYSTEM (CPS) - A system of air locks, high-pressure fans, and high efficiency filters providing pressurized, filtered air to total protection (TP) zones and filtered air to limited protection (LP) zones. See TOTAL PROTECTION ZONE and LIMITED PROTECTION ZONE.

COLUMN FORMATION - A formation in which ships are formed in single file in the order of sequence numbers or call signs, with the line guide usually being the lead ship.

COLUMN OPEN ORDER - A line formation that is utilized in formation steaming due to ships being able to communicate visually with each other easier as a result of their bearing to the guide.

COMBAT AIR PATROL - Used to relay requirements to CAP units, receive and process data, EEIs include target location, time on station requirements, rules of engagement, fuel requirements, and other CAP related data.

COMBAT INFORMATION - Unevaluated data, gathered by or provided directly to the tactical commander which, due to its highly perishable nature or the criticality of the situation, cannot be processed into tactical intelligence in time to satisfy the user's tactical intelligence requirements. (Joint Pub l-02).

COMBAT DIRECTION SYSTEM - Tactical computer, display and switching system used for rapidly collecting, evaluating, integrating, displaying, and disseminating tactical environment information.

COMBATANT COMMAND (command authority) - Non-transferable command authority established by title 10, United States Code, section 164, exercised only by commanders of unified or specified combatant commands unless otherwise directed by the President or the Secretary of Defense. Combatant command (command authority) is the authority of a combatant commander to perform those functions of command over assigned forces involving organizing and employing commands and forces, assigning tasks, designating objectives, and giving authoritative direction over all aspects of military operations, joint training, and logistics necessary to accomplish the missions assigned to the command. Also called COCOM. (Joint Pub 1-02).

COMBATANT COMMANDER - A commander in chief of one of the unified or specified combatant commands established by the President. (Joint Pub l-02).

COMBINATION BUOY - Pillar buoy that combines light and sound or fog signals.

COMBUSTIBLE LIQUIDS - Any liquid having a flash point at or above 37.8°C (100°F) comfort of personnel.

COMBUSTION - The burning of fuel in a chemical process accompanied by the evolution of light and heat.

COMBUSTION - A rapid chemical reaction that releases energy in the form of light and noticeable heat. Most combustion involves rapid OXIDATION, which is the chemical reaction by which oxygen combines chemically with the elements of the burning substance.

COMDAC SOFTWARE - May be used for situational awareness only; capabilities include complete voyage planning, PIM calculations, day and night displays, global positioning system datum conversion, tide and current displays, radar chart mapping overlays, man overboard functions, and target tracking.

COMEBACK (LEFT/RIGHT) - Directive to reverse course.

COMEOFF (LEFT/RIGHT/LOW/ HIGH) - A directive to maneuver as indicated to either regain mutual support or to deconflict flight paths for an exchange of engaged and supporting roles. Implies both visual and tally.

COMING LEFT/RIGHT - ASW-unit is altering course in direction indicated. (to course indicated).

COMMAND - 1. The authority that a commander in the Armed Forces lawfully exercises over subordinates by virtue of rank or assignment. Command includes the authority and responsibility for effectively using available resources and for planning the employment of, organizing, directing, coordinating, and controlling military forces for the accomplishment of assigned missions. It also includes responsibility for health, welfare, morale, and discipline of assigned personnel. 2. An order given by a commander; that is, the will of the commander expressed for the purpose of bringing about a particular action. 3. A unit or units, an organization, or an area under the command of one individual. (Joint Pub I-02).

COMMAND and CONTROL - The exercise of authority and direction by a properly designated commander over assigned and attached forces in the accomplishment of the mission. Command and control functions are performed through an arrangement of personnel, equipment, communications, facilities, and procedures employed by a commander in planning, directing, coordinating, and controlling forces and operations in the accomplishment of the mission. (JCS/J7/Joint Doctrine Division memo dtd 20 Oct 94).

COMMAND and CONTROL SYSTEM - The facilities, equipment, communications, procedures, and personnel essential to a commander for planning, directing, and controlling operations of assigned forces pursuant to the missions assigned. (Joint Pub l-02).

COMMAND and CONTROL WARFARE - The integrated use of operations security (OPSEC), military deception, psychological operations (PSYOP), electronic warfare (EW), and physical destruction, mutually supported by intelligence, to deny information to, influence, degrade, or destroy adversary command and control capabilities, while protecting friendly command and control capabilities against such actions. Command and control warfare applies across the operational continuum and at all levels of conflict. Also called C2W. C2W is both offensive and defensive: a. counter-C2-To prevent effective C2 of adversary forces by denying information to, influencing, degrading, or destroying the adversary C2 system. b. C2 protection-To maintain effective command and control of own forces by turning to friendly advantage or negating adversary efforts to deny information to, influence, degrade, or destroy the friendly C2 system. (Joint Pub l-02).

COMMAND ASSESSMENT of READINESS and TRAINING (CART) - A basic assessment of training proficiencies and weaknesses.

COMMAND DETONATION FUSES - Allows positive control of warhead detonation. The weapon explodes upon receipt of a signal from the firing unit.

COMMAND'S EFFECTIVE INSTRUCTIONS (5215 Instructions) - A listing of all of the ship's effective instructions, who is in charge of maintaining and updating them, and how often it needs to be done.

COMMAND GUIDANCE - Depends on radar or radio control links between the control point and the in-flight missile.

COMMAND'S RECURRING REPORTS (5214 Instructions) - Provides a consolidated list of the ship's administrative and operational reports requiring periodic update and the procedures for preparing them.

COMMANDING OFFICER (CO) - Officer charged with the absolute responsibility for the safety, well-being, and efficiency of the ship.

COMMENCING - I have left final approach fix on an instrument approach for landing.

COMMIT(TED) (Bullseye position) - Directive/informative call indicating the intention to conduct an intercept against bogey(s)/ bandit(s).

COMPARTMENT AIR TEST - A test of watertight compartments using compressed air.

COMPARTMENT CHECK-OFF LIST - Provides an itemized listing of all classified fittings and closures used in damage control to set the specified material condition of readiness.

COMPASS - Refers to the compass card's axis.

COMPASS ERROR - Combined effect of variation and deviation.

COMPETENCY for DUTY EXAMINATIONS - Evaluation by medical personnel conducted to detect the use of illegal substances when there is reason to suspect a military member is illegally under the influence of a controlled substance or alcohol while on duty (violation of Uniform Code of Military Justice Article 112).

COMPLETE DECK - A deck that extends from side to side and stem to stern.

COMPRESSION - The process of compressing the fuel mixture in a cylinder of an internal combustion engine. During the refrigeration cycle, the refrigerant is compressed inside the compressor from a low-pressure, low-temperature vapor to a high-pressure vapor, and its temperature rises accordingly.

COMPROMISE - The unauthorized disclosure of classified information to a person(s) who does not have a valid clearance, authorized access or a need-to-know.

COMPUTER - Digital device that solves the gunfire control problem.

COMPTUEX - Each Carrier Battle Group performs a rehearsal called Composite Training Unit Exercise (COMPTUEX) before departing for a six-month deployment. Over the previous several months, each ship and aircraft in the battle group has trained in its specialty. COMPTUEX brings ships together to project force as a battle group. COMPTUEX is an intermediate-level battle group exercise designed to forge the battle group into a cohesive, fighting team. It's a critical step in the pre-deployment training cycle and a prerequisite for the battle group's Joint Task Force Exercise.

COMPUTER - The most important piece of equipment in any tactical data system; performs functions of processing and storing information.

COMPUTED RANGE - Distance a light can be seen in perfect visibility.

COMPUTED VISIBILITY - Visibility determined for a light using the light's height, nominal range, and observer's eye height.

CONCENTRATION - The quantity of a substance per unit volume. Examples of concentration units are milligrams per cubic meter (mg/m3); parts per million (ppm) for vapors, gases, fumes, or dusts; fibers per cubic centimeter (fibers/cc) for vapors or gases.

CONDENSATION - The change from a gaseous (or vapor) state to a liquid state. The process of cooling a vapor resulting in a change to a liquid state. The process of cooling the freshwater vapor produced by evaporation to produce usable freshwater. Condensation is the second half of the process of distillation.

CONDITION HAIRY - An alerting signal meaning all units may be required to prosecute an unidentified submarine contact.

CONDUCTION - Transfer of heat through a body or from one body to another by direct physical contact.

CONDUCTION - Heat transfer by actual contact between substances or from molecule to molecule within a substance.

CONDUCTOR - A material with a large number of free electrons. A material which easily permits electrical current to flow.

CONFETTI - Chaff lane or corridor.

CONFIDENCE - Confidence indication to intercepted transmission.

CONFIDENTIAL - A security classification that provides some protection.

CONFINED SPACE - A space which has restricted openings for entry and exit and in which hazardous contaminants could be expected to be produced but not removed by ventilation; or in which oxygen could be expected to be depleted or enriched.

CONFIRM - Verify the existence of the contact designated.

CONFIRMED COMPROMISE - Confirmation that a compromise of classified material has taken place. Contraband Inspection - An inspection where one tries to locate and confiscate unlawful weapons and other contraband.

CONS/CONNING - Aircraft leaving contrails.

CONGRESSIONAL REQUESTS - A request for a congressional inquiry into matters that a member feels needs to be answered. Navy service members, members of their families,civilian employees, or anyone else may ask their elected officials to help them with a matter involving them and/or the Department of the Navy.

CONTACT (air) (maritime) - 1. Informative call of radar/IR detection of an aircraft. Call should include bearing, range and altitude (BRA) in reference to Bullseye or geographic position format. 2. Acknowledges sighting of a specified reference point Initial and subsequent detection's of any object obtained by any detecting device.

CONTACT FUSES - Detonates on contact or after a short delay.

CONTACT HAZARD - A skin hazard that exists when exposure to a chemical or biological agent can result from touching a contaminated surface.

CONTACT POSITION - Receiver position where the receptacle of the aircraft makes contact with the drogue or boom.

CONTAMINANT - A material or agent that is foreign to a specified or desired condition or circumstance.

CONTAMINATION CONCENTRATION - Amount of a chemical agent vapor or aerosol present in a unit volume of air; usually expressed in milligrams per cubic meter (mg/m3).

CONTAMINATION CONTROL AREA (CCA) - The CCA is used to control access to the ship of all personnel exposed to the weather during or after a chemical, biological, and radiological attack.

CONTAMINATION CONTROL - Procedures to avoid, reduce, remove, or render harmless, temporarily or permanently, biological, chemical, or radiological contamination for the purpose of maintaining or enhancing the efficient conduct of military operations.

CONTAMINATION DENSITY - Amount of liquid or solid agent in a unit area; usually expressed in milligrams or grams per square meter (mg/M2 or g/M2).

CONTAMINATION - The deposition on and absorption of biological or chemical agents or radioactive material by shipboard structures, areas, personnel, or equipment; the presence of chemical or biological agents in the air in the form of vapors (chemical) or aerosols (chemical or biological).

CONTIGUOUS ZONE - A zone of the ocean extending from 3-12 nm from the U.S. coastline.

CONTINUE - Continue present maneuver, does not imply clearance to engage or expend ordnance.

CONTINUE DRY - Continue present maneuver, ordnance release not authorized.

CONTINUE PORT/LEFT - Continue turning left at present rate of turn to magnetic heading indicated (3 figures) or continue turning left for number of degrees indicated.

CONTINUE STBD/RIGHT - Continue turning right at present rate of turn to magnetic heading indicated (3 figures) or continue turning right for the number of degrees indicated.

CONTINUOUS AIM CORRECTION (CAC) - Utilized to continuously direct a stream of projectiles to the target throughout the firing period.

CONTROL - Authority which may be less than full command exercised by a commander over part of the activities of subordinate or other organizations. (Joint Pub l-02).

CONTROL - The unit designated as EWC.

CONTROL AIR SUPPLY - Clean, dry air at proper pressure for operation of pneumatic control equipment.

CONTROL FAILURE - Prevents orders from the guidance system from being followed; the weapon is unable to adjust its flight path to achieve target intercept.

CONTROL SECTION - Consists of movable actuators and external surfaces that adjust the flight path.

CONTROL SEGMENT - Consists of ground stations that ensure satellites are working properly.

CONTROL SHIP - The unit guide for UNREP and usually delivers the product.

CONTROLLED VARIABLE TIME-RADIO FREQUENCY (CVT-RF) - Provides an adjustable arming time feature that prevents the fuse from arming until a few seconds before set time.

CONUS - Continental United States; also may be referred to as Contiguous US.

CONVALESCENT LEAVE - Administrative leave granted to pregnant service members after delivery of a child.

CONVECTION - The transmission of heat by the circulation of a liquid or a gas such as air. Convection may be forced by use of a pump or fan, or it may occur naturally due to heated air or liquid rising and forcing the colder air or liquid downward.

CONVECTION - Transfer of heat through the motion of circulating liquids or gases such as air. Convection may be forced by use of a pump or fan, or it may occur naturally due to heated air or liquid rising and forcing the colder air or liquid downward.

CONVENTIONAL DECONTAMINATION (DECON) STATION - Conventional decontamination stations generally have saltwater nozzles in the shower stalls in addition to freshwater nozzles. Large ships may have additional saltwater decontamination stations. Multiple decon stations and the availability of both salt and fresh water provide for working around contaminated areas and battle-damaged areas.

COOPERATIVE ENGAGEMENT CAPABILITY - System of hardware and software that allows sharing air target radar data among ships, line-of-site data distribution system, results in all units seeing the same radar picture, allows a ship to engage a threat aircraft or cruise missile using radar data from another ship.

CORE - Element around which strands are laid to form the wire rope; may be of hard fiber, such as manila, hemp, plastic, paper, or sisal.

CORPEN - A wheeling movement whereby a formation course is changed without altering the arrangement of ships.

CORPSMEN - Provide first?aid services to the rig crew.

CORRECT CASREP (CASCOR) - Submitted when equipment, which has been the subject of casualty reporting, is repaired and returned to operational condition.

CORROSIVE - Any hazardous material that will cause severe tissue damage by chemical action or materially damage surfaces or cause a fire when in contact with organic material or certain other chemicals.

CORROSIVE MATERIAL - A solid, liquid, or gas that degrades other substances (especially metals) through chemical action. It can burn, irritate, or destructively attack organic tissue.

COUNTDOWN - I am about to open fire within ____ seconds.

COUNTER-RECOIL SYSTEM - Returns the gun to battery after firing; pressurized nitrogen drives counter-recoil pistons forward to put the gun barrel housing back to in-battery position.

COUNTERMARKER - A unit maintaining contact on a marker from a position which enables it to counter the threat presented by the marker.

COUNTERMEASURES WASHDOWN (CMWD) SYSTEM - A dry-pipe sprinkler system that provides a moving screen of seawater over the weather surfaces of the ship. The flowing water carries away most of the liquid and solid contaminants that fall on the decks or bulkheads.

COUPLING - A device that secures shafting together in a manner to permit disassembly whenever necessary.

COURSE MADE GOOD (CMG) - Single resultant direction from a given point of departure to a subsequent position; the net direction of movement from one point to another.

COURSE OVER GROUND/SPEED OVER GROUND (COG/SOG) - Actual path and speed of a vessel with respect to the earth; will not be a straight line if the vessel's heading varies as she yaws back and forth across the course.

COVEC - A procedure for passing reports of positions on uncovered circuits.

COVER - Keep fighters between force/base and contact designated at distance stated from force/base(e.g. Cover hostile 27 to 30 miles). An order from the AAWC to a MRSAM/LRSAM equipped ship to initiate an engagement on specified track up to but not including the point of firing. This procedure allows a track to be designated to more than one firing unit without multi-engagement of the track. Directive/informative to take surface-to-air action or establish an air-to-air posture that will allow engagement of a specified target or threat.

COWBOY(s) - Ship(s) of search attack unit (SAU).

CPS DECONTAMINATION STATION - Four-compartment decon station with access to the weather deck in each TP zone.

CRACKERS - Sound Underwater Signal (SUS) or Practice Depth Charge (PDC) explosives.

CRANK (direction) - Directive/descriptive call indicating an F/A-Pole maneuver in a specific direction (RED 1, crank south).

CRASH START - Start main engines and get underway as quickly as possible.

CREEP - Movable parts move forward as the projectile slows down; often used to align the fuse-firing mechanism so that it functions on impact.

CRISS CROSS - A position or track derived from the plotting of DF bearings.

CROSS-LEVEL - Vertical movement of the deck plane within a plane perpendicular to the plane containing the line of sight.

CROWN - Anchor's base.

CRUISE - Informative or directive call to return to cruise speed (after buster or gate).

CUCKOO - Hostile jamming transmitter.

CURVE - Deception signal.

CURRENT LEGAL WILL - A legal document outlining any specific wishes regarding how the service member's property should be distributed upon death.

CURRENT TRIANGLE - Graphic representation known as a vector diagram where one side represents the ship's course and speed, the second side set and drift, and the third course and speed made good (CMG/SMG).

CUT - Stop main engines.

CUTOFF - Directive to intercept using cut-off geometry.

CYCLE SCHEDULE - Displays the planned maintenance requirements to be performed during the period between major overhauls/yard periods of ships undergoing phased maintenance.

CYCLOPS - Unmanned Aerial Vehicle.

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DAILY PAGES - The majority of the Nautical Almanac is laid out in this form and contains astronomical information for three consecutive days.

DAMAGE CONTROL ASSISTANT (DCA) - The DCA is the primary assistant to the damage control officer in the areas of damage control; fire fighting; and chemical, biological, and radiological defense.

DAMAGE CONTROL BOOKS - These books contain descriptive information, tables, and diagrams. Each book is pertinent to an individual ship. The information given covers the following six subjects: "Damage Control Systems," "Ship's Compartmentation," "Ship's Piping Systems," "Ship's Electrical Systems," "Ship's Ventilation Systems," and "General Information."

DAMAGE CONTROL CENTRAL (DCC) - The primary purpose of DCC is to collect and compare reports. Location onboard ship where damage control operations are coordinated through and also where direction is given to repair teams.

DAMAGE CONTROL CLOSURE LOG - All ships are required to prepare and maintain a damage control closure log. The closure log is maintained at all times, whether the ship is in port or under way. The closure log is used to show where the existing material condition of readiness has been modified, the fitting's type, number, and classification, the name, rate, and division of the person who requested permission to open or close the fitting, the date and time the fitting was opened or closed, the date and time the fitting was returned to its specified material condition of readiness setting, the name and rate/rank of the person granting permission.

DAMAGE CONTROL KITS - At each repair locker a number of repair kits are made up and stowed in canvas bags. These kits are kept ready to be taken to the scene of damage. The kits should be constructed and packaged so they will fit through the smallest watertight scuttle on your ship. These kits are commonly called plugging kits, pipe - patching kits, and shoring kits.

DAMAGE CONTROL ORGANIZATION - The damage control organization consists of two elements - the damage control administrative organization and the damage control battle organization.

DAMAGE CONTROL PETTY OFFICER (DCPO) - Responsible, under the Leading Petty Officer, for damage control functions of the division and related matters.

DAMAGE CONTROL TRAINING - Consistent training produces an optimal level of readiness that prepares members of repair party teams to react more efficiently and effectively to actual casualties.

DAMAGE CONTROL TRAINING TEAM (DCTT) - Composed of qualified senior members of the ship's crew specifically tasked to ensure the ship's company maintains the highest level of battle readiness. This training is maintained through comprehensive training programs, which include lectures and drill scenarios.

DANCE - Shift all lines to complan (__)(column codeword/designator).

DANGER BEARINGS - Used to ensure the vessel remains clear of hazards.

DANGER TAG - A danger tag is a red tag prohibiting operation or removal of equipment that could jeopardize safety of personnel or endanger equipment, systems, or components.

DARKEN SHIP BILL - The Darken Ship Bill is used to ensure that all DOG - ZEBRA fittings are closed by applicable divisions whenever darken ship is ordered.

DART - Aircraft rocket/aerial gunnery target.

DASH (-) - Aircraft position within a flight. Use if specific call sign is unknown.

DATA FORWARDING - Process of receiving data on one link and forwarding it on another link.

DATA LINKS - Primary means of communications between TDS units.

DATA LINKS - Data links involve transmission of bit-oriented digital information exchanged via HF or UHF radio frequencies.

DATA LINK REFERENCE POINT - Fixed geographic point from which all link tracks are referenced.

DATA TERMINAL SET (DTS) - Functions as a Link-11 modem converting digital data to audio for radio transmission and audio to digital for display.

DATUM - Input into the GPS receiver, which tells the receiver the reference to be used for calculating navigation position fixes. Last known position of a submarine or a suspected submarine after contact has been lost.

DATE-TIME-GROUP (DTG) - Date and time the message was delivered to the communications center for transmission; assigned to uniquely describe a message for identification purposes.

DATUM - Input into the GPS receiver, which tells the receiver the reference to be used for calculating navigation position fixes.

DAYBEACONS - Single pile or multiple-pile structures fixed to the sea floor; may be used to take visual bearings.

DAYLIGHT SAVINGS TIME - One hour later than standard time for any given zone.

DCTT TEAM LEADER - The executive officer serves as the chairman of the planning board for training and team leader of the DCTT. The executive officer will coordinate the planning and execution of the ship's training effort. The team leader of the DCTT is responsible for the management of the training team.

DCTT TEAM COORDINATOR - The ship's senior Damage Controlman or Hull Maintenance Technician normally hold the position of DCTT team coordinator.

DD FORM 553 - Deserter/Absentee Wanted by the Armed Forces.

DEAD RECKONING - Process of determining a ship's approximate position by applying a vector or series of vectors representing the run that has been made since the ship's last fix; uses only courses steered and speeds ordered without considering current.

DEAD RECKONING TRACER - The DRT is a plotting device that represents a true picture because ownship moves across the trace by receiving gyro input.

DEADEYE - Informative call by an airborne laser designator indicating the laser/IR system is inoperative.

DEADLY FORCE - Three requirements; person has ability to harm a team member; person has opportunity to cause harm; team member feels jeopardized by persons action or manifest intent.

DECCA NAVIGATOR SYSTEM - A hyperbolic radio navigation system.

DECAY (RADIOLOGICAL) - The decrease in the level of radioactivity from nuclear fallout as fission fragments decompose to a more stable state.

DECK ALERT - An aircraft alert state expressing the time in minutes required for a specified number and type of aircraft to become airborne after the order to launch has been given.

DECK CLEAR - Deck now ready to resume launching or landing operations.

DECK FOUL - Unable to launch or land aircraft (followed by a numeral to indicate minutes anticipated before ready to resume operations).

DECLARE - Inquiry by fighter to AWACS/GCI or capable aircraft as to the identification of a specified track(s), target(s), or correlated group. Responses include "Friendly, Bogey, Bandit," partial ID or "Unable".

DECLARED DESERTER - A member who has been administratively classified as a deserter and has been absent without leave for more than 30 consecutive days.

DECLASSIFIFED - To remove or reduce a security classification of a document.

DECLASSIFICATION LINE - Used on all messages that are classified to indicate when the message will be declassified.

DECLINATION - The angular distance north or south of the Celestial Equator, and like Latitude is measured from 0 through 90 degrees.

LAUNCHINGOY LAUNCING SYSTEM (DLS) MK 36 Mod 12 - A mortar-tube launched decoy that countermeasures system that projects decoys aloft at specific heights and ranges.

DECKS - The floors of a ship.

DECONTAMINANT - Anything used to break down, neutralize, or remove a chemical or biological material posing a threat to personnel or equipment.

DECONTAMINATION - The process of removing radiological contaminants from a person, equipment, or structure. The process of making any person, equipment, or structure safe by absorbing, destroying, neutralizing, making harmless, or removing chemical or biological agents.

DECONTAMINATION EFFECTIVENESS - The degree to which decontamination reduces a radiation hazard. The ratio of the radiation intensity after decontamination to what it would have been without decontamination.

DEEP - Contact is below layer depth.

DEEP SHELTER - Compartments that provide shielding against radiation.

DEFENSIVE (SPIKE/ MISSILE/SAM/ MUD/ AAA) - Aircraft is in a defensive position and maneuvering with reference to the stated condition. If no condition stated, maneuvering is with respect to A/A threat.

DEFICIENCY OF OXYGEN - An atmosphere where the oxygen content has been reduced below the point at which a person may work comfortably (approximately 19.5% by volume).

DELAY - The signal is to be retransmitted as soon as possible as ordered.

DELAYED FALLOUT - Fallout from a nuclear explosion that does not fall to the surface until 24 or more hours after the explosion.

DELIVERY SHIP - Normally the control ship.

DELTA(__)(__) - Hold and conserve fuel at altitude and position indicated.

DELTA (D) FIRES - Those that occur in combustible metals, such as magnesium, titanium, and sodium.

DEMONS - Depth in meters.

DEMULSIBILITY, or EMULSION CHARACTERISTIC - The oil's ability to separate cleanly from any water present. This is an important factor in forced lubrication systems. Purifiers are installed in larger oil and hydraulic systems to remove water and particulate matter.

DENSITY - The density of any material, solid or liquid, is obtained by weighing a unit volume of the material.

DENSITY - The weight per unit volume of a substance.

DEPARTMENT HEAD (DH) - Officer responsible to the Commanding Officer for all matters pertaining to the department.

DEPOSIT RADIATION - Radiation from radioactive particles that have landed on the ship.

DEPARTMENT of DEFENSE (DoD) - Utilizes navigation information to conduct missions.

DEPARTMENT of TRANSPORTATION (DOT) - Ensures the safety of people and goods coming in and out of the U.S. transported via the sea.

DEPLOY - Directive to maneuver to briefed positioning.

DEPTH - The distance from the reference plane to the bottom.

DERANGED EQUIPMENT - Damaged electrical equipment of unknown condition/status.

DESCENT RATARDATION DEVICE - Rotochute or parachute used to slow sonobuoy descent.

DESERTER - A member administratively classified under Article 85, UCMJ and found guilty by court-martial.

DESIGNATED STRIKERS - Personnel in paygrades E-1 through E-3 who have been identified as apprentices in a specific rating. Striker designation identifies the rating in which an individual has demonstrated significant skills and experience as a result of on-the-job-training (OJT) or formal classroom training.

DESIGN PRESSURE - The pressure specified by the boiler manufacturer as a criterion for boiler design. Design pressure is NOT the same as operating pressure. (Design pressure is approximately 103 percent operating pressure). Design pressure is given in the manufacturer's technical manual for the boiler. - How classified information is destroyed.

DESUPERHEATED STEAM - Steam that has been cooled by being passed through a pipe extending through the steam drum.

DETACHABLE END LINK - (Pear link) an end link that can be disassembled.

DETACHABLE LINK - C-shaped with two coupling plates that form a stud; uses a taper pin to hold parts together; taper pin locked in place by a lead plug.

DETACHABLE LINK PARTS - Not interchangeable; matching numbers stamped on all parts.

DETACHABLE LINK TOOLBOX - Box that contains matched-size tools to assemble or disassemble a specific link.

DETECTION - The initial recognition of a contact presence.

DETECTOR - Any mechanism by which the approach or presence of a chemical or biological agent is made known.

DETECTOR PAPER - A specially treated paper used to determine the presence of liquid chemical agent.

DETECTOR TUBE - A glass tube that uses a sensitive chemical (in a suspension of silica gel), which produces color change whenever contaminated air is pulled through it.

DETERGENT - A synthetic cleaning and emulsifying substance usable in either fresh water or seawater for decontamination.

DEVIATION - Compass error induced by the ship's magnetic field, it is also defined as east (right) or west (left), and varies depending on the strength of the ship's magnetic field and heading.

DEVILS - Submarine depth in tens of feet.

DEW POINT - The temperature at which water vapor begins to condense in a given sample of air. The relative humidity, at the dew point temperature, is 100 percent. The dew point depends upon temperature and pressure.

DIAMOND FORMATION - Provides additional maneuvering room without increasing length of the formation.

DIFFERENTIAL GPS (DGPS) - Additional input provided by a ground station designed to reduce inherent navigational errors.

DIFFUSION - A process to disperse and equalize a physical state (such as temperature) or a gas (when one gas is introduced to another).

DIGITAL FLUX GATE MAGNETIC COMAPASS (DFGMC) - A replacement for the magnetic compass, designed to improve accuracy by removing deviation from the compass equation.

DIGITAL NAUTICAL CHARTS - Created by NIMA, manufactured and distributed on CD-ROM's; most are raster charts; for international electronic navigation systems approval, DNC's must be completely vector charts.

DIKE - In AIR/SUB co-operation, a rendezvous procedure.

DILUTION VENTILATION - Introduces air into a space to dilute the contaminated air within the space to an acceptable level. Generally used for the control of flammable, oxygen - deficient or oxygen - enriched areas, rather than control of toxicants.

DIP - Conduct search with helicopter sonar (may be followed by transducer depth in feet).

DIP BOSS - ASW helicopter flight leader.

DIP the EYE - To run the eye of one mooring line through the eye of another line when two mooring lines share a bollard.

DIP GANG - Collective call sign for all helicopters on net.

DIP MASTER - ASW helicopter air coordinator.

DIP ROPE - Used to moor or clear a hawse pipe.

DIP ROPE METHOD - The buoy party attaches the buoy wire then passes the messenger through the buoy's eye and attaches it to the dip rope.

DIP WATCHER - ASW helicopter control unit.

DIPPER - An ASW helicopter capable of conducting both sonar search and attack.

DIPPING SONAR - Variable depth sonar used by LAMPS helicopters in combination with sonobuoys to detect and track submarines.

DIRECTIONAL LIGHTS - Illuminate sectors or display very narrow angle light beams for ships to follow.

DIRECT CURRENT (DC) - An electrical current that flows in one direction only.

DIRECT FIRE ATTACK - A method of attacking a fire in which fire fighters advance into the immediate fire area. The extinguishing agent is applied directly onto the seat of the fire to extinguish the fire or spray a water fog (fog attack) into the hot gas layer over the seat of the fire to gain control.

DIRECT RANGE RATE - Change of the target's range.

DIRECTIVES ISSUANCE SYSTEM (SECNAVINST 5215.1 (Series)) - Promulgates revised policies, responsibilities, and standards for the administration of subject system and how to prepare and maintain Instructions, Notices, and Change Transmittals.

DIRECTOR - Stabilized platform upon which radar is mounted; establishes and maintains Line of Sight to the target.

DIRECTION of RELATIVE MOVEMENT - The way a contact appears to be moving when observed from ownship, which is also moving.

DIRTY - Link's not encrypted.

DISCHARGE - Complete severance from all naval status gained by the enlistment or induction concerned.

DISCONNECT - Command by tanker or receiver that boom/drogue will be disconnected.

DISPLACEMENT - The weight of the volume of water displaced by the hull.

DISPLACEMENT - The volume of fluid that can pass through a pump, motor, or cylinder in a single revolution or stroke.

DISTANT OBJECT METHOD - Take a bearing to a distant object and compare it with a true bearing, determined from the chart using a known pierside position.

DISTILLATE - Freshwater produced by condensation of steam; the end product of a distilling plant.

DISTILLATION - The total process of the distilling plant, including evaporation and condensation. The process of boiling seawater and then cooling and condensing the resulting vapor to produce freshwater.

DISTRIBUTION - How classified information is processed when it is first received.

DITCHING - The forced alighting of an aircraft on water.

DIURNAL - Single high & low each tidal day, small variations between successive highs and lows (Northern shore of the Gulf of Mexico, Java Sea, & Tonkin Gulf).

DIVERT - Proceed to planned diversion base or specified field or carrier.

DIVISION OFFICER (DIVO) - Person responsible, under the department head, for the duties assigned to the division and for the conduct of division personnel.

DMAA - The Duty Master-at-Arms is responsible for maintaining good order and discipline in the absence of the Chief Master-at-Arms. Reports to the CDO.


DODGER (__) - Mobile ASW training target.

DOG BOX - Area within which units may interfere with or be endangered by ASW torpedoes.

DOG ZEBRA - Fittings marked with a red Z inside a black D. These modified fittings are secured during condition ZEBRA and darken ship conditions. You must have proper authorization to open fittings with this classification when the ship is at either condition ZEBRA or darken ship.


DOSE (CHEMICAL OR BIOLOGICAL) - The amount of biological or chemical agent to which a person is exposed in a given period of time.

DOSE (RADIOLOGICAL) - The total amount of ionizing nuclear radiation that is absorbed by an individual, an object, or a system over a specified time interval.

DOSE RATE (RADIOLOGICAL) - The rate at which a radiological dose is absorbed.

DOSE RATEMETER - A RADIAC instrument used to measure dose rate.

DOSE RATE/SURVEY METER - The device that measures radiation intensity. This device provides the information needed to calculate the radiological hazards of occupying a contaminated area or handling contaminated equipment. It also provides the information necessary to calculate the approximate length of time personnel can safely remain in a radiological contaminated area.

DOSIMETER - A RADIAC instrument used to measure the total dose received from exposure to radiation.

DOUBLE UP - Sends a bight from the same mooring line to the pier; this will leave three standing parts (an eye and a bight).

DOWNGRADE - To decrease the classification level of a document.

DOWN-RANGE - Means anywhere within the firing arc of the gun.

DRAG CICRLE - Circle centered at the final calculated anchor's position with a radius equal to the sum of the hawse pipe to pelorus distance, and the final length of chain let out; subsequent fixes should fall within.

DRAG/DRAGGING (Direction) - Maneuver by an aircraft to position an other aircraft in a cone +/- 120 to 180 degrees off the maneuvering aircraft's nose.

DRAG CICRLE - Circle drawn from the actual anchor location with a radius equal to the length of the anchor chain veered plus the distance from the hawse pipe to the pelorus.

DRAFTER - Composes or writes the message and possesses detailed knowledge of the Naval Telecommunication Procedure Manual NTP 3 (J).

DRAWING - I have a LOFAR contact on a sonobuoy. Sonobuoy number or position is __.

DRIFT - Current speed in knots.

DRILL CRITIQUE - After each training evolution, the training team must conduct a debrief. It is necessary for the training team to discuss and document a list of "Lessons Learned."

DROP - The order to inhibit the release of the track to the link and relinquish reporting responsibility.

DROP KING - Unit controlling weapon release time.

DROP POINT - Position of weapon release.

DROP TRACK___ - Remove the contact designated from all parts of the tactical picture/stores.

s DROP(BRA)/DROPPING (BRA) - Directive/descriptive call that a fighter is about to intentionally break lock on a target. GCI should monitor the target.

DROOP - Varied speed with varying load.

DRUG/ALCOHOL PROGRAM ADVISOR (DAPA) - Specially trained paraprofessionals who have completed a one-week training program on substance abuse programs available to naval personnel. The DAPA advises the CO on the administration of command substance abuse programs.

DRUG and ALCOHOL PROGRAM ADVISOR (DAPA) COURSE - One-week course mandated within 90 days for individual appointed at the command DAPA.

DRY CHEMICAL EXTINGUISHER - Used primarily on class BRAVO fires. PKP is the chemical most often used in these extinguishers.

DRY CONTACT - AAR contact during which no fuel is transferred.

DT - 60/PD - A gamma radiation dosimeter with a usable range of 10 to 600 R.

DTS USE - Provides commanders with sources of information in addition to NTDS and a means to send data to non-NTDS units.

DUAL-PURPOSE BATTERY - Designed to combat air, shore, and surface targets.

DUCK - Informative/directive call to descend and increase speed.

DUCKBUTT - Aircraft assigned to perform precautionary SAR. Performs secondary role as NAVAID to passing aircraft providing tracking, homing and steering information as well as position and weather reports when required.

DUFFER DF - equipped unit.

DUTY DEPARTMENT HEAD - Duty Department Heads ensure that each department completes departmental assignments when the Department Head is not onboard. Reports to the CDO.

DYNAMIC OVERPRESSURE - The strong winds that accompany the air blast front that expands outward from a nuclear burst. They exert a directional force that tends to drag exposed objects and personnel along with it.

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E2-C HAWKEYE - Monitor air and surface areas for enemy contacts, relay data using Link-11 and JTIDS Link-16.

E-3A SENTRY - USAF airborne warning and control providing weather surveillance, command and control, and communications, equipped with JTIDS Link-16 and/or Link-11.

EAGLE - The air safety cell call sign established in ships with a full control capability, during an exercise involving simulated attacks on the fleet, either by carrier or land based aircraft.

EAGLE NET - The air attack safety net.

EARDRUM - In AIR/SUB co-operation a generic call sign for aircraft.

EARLY___ - Your wave is early indicated minutes.

EARLY FALLOUT - Fallout from a nuclear explosion that falls to the surface within the first 24 hours after the explosion.

EASING OUT LINES - Used to control the span wire until the ship is clear; prevents the span wire from banging into things or becoming entangled.

EBB - Horizontal movement of water away from shore or down river.

ECHELON (Direction) - Groups/contacts/formation with wingman displaced approximately 45 degrees behind leader's 3/9 line.


EDISON - Submarine turn on upward beamed diver's lights and/ or anchor lights.

EEL - Submarine floating antenna.

ELBOW Aircraft - home on this signal with appropriate homing equipment. Submarine-radiate signal on the 400-500 Khz range.

ELECTRIC MEGAPHONE - Standby means of communication until phones are connected.

ELECTROMAGNETIC PULSE (EMP) - An intense electromagnetic field that builds up to maximum strength within fractions of a second after a nuclear explosion. It can damage unprotected electrical and electronic equipment by inducing strong electric currents in its circuitry.

ELECTRICAL JUMPER - A temporary wire used to modify a circuit, such as by completing or bypassing the circuit.

ELECTRON - An extremely small particle of matter that orbits the nucleus of the atom. It has a negative electrical charge.

ELECTRONIC COUNTER-COUNTERMEASURES - Actions taken to ensure friendly effective use of the Electromagnetic spectrum despite enemy use of EW.

ELECTRONIC COUNTERMEASURES - Actions taken to prevent or reduce an enemy's effective use of the electromagnetic spectrum.

ELECTRONIC NAUTICAL CHARTS - Vector charts that meet international standards for electronic navigation.

ELECTRONIC SUPPORT (ES) - Sensors passively scan the electromagnetic frequency spectrum for electronic emissions from hostile forces.

ELECTRONIC WARFARE - Military action involving the use of electromagnetic energy to determine, exploit, reduce, or prevent hostile use of the electromagnetic spectrum and action which retains friendly use of the spectrum. EW is the search, detection and classification of signals in the electro-magnetic spectrum such as radars, homers and communication frequencies.

ELECTRONIC WARFARE COORDINATION and REPORTING NET - Dedicated EW net allowing greater control of EW reporting and data dissemination, EEIs include contact electronic track data, friendly force emission violations, and other data related to passive or active electronic warfare.

ELECTRONIC WARFARE SUPPORT MEASURES - Actions taken under an operational commander's direct control to search for, intercept, identify, and locate radiated electromagnetic energy sources for immediate threat recognition.

ELECTRONICS ENCLOSURE - Provides environmental protection and packaging for most of the weapon system's electronics.

EM VETCOR - Maneuvering ship's true course and speed.

ER VETCOR - Reference ship's true course and speed.

EMERGENCY BREAK OFF - Discontinue ASW action, maneuver to avoid collision, resume action as soon as clear to do so.

EMERGENCY COMMAND (Y) - Reserved for use by the National Command Authority and designated unified commanders; used only for message traffic containing emergency action messages; speed of service objective essentially instantaneous.

EMERGENCY BILLS - Bills that apply when there is danger of loss of life or the ship. Some examples include those for aircraft crash and rescue, general emergency, and man overboard.

EMERGENCY BREAKAWAY - An accelerated standard breakaway in UNREP.

EMERGENCY CIRCUITS - Used to provide a means of re - establishing communications once a casualty has occurred to the primary lines.

EMERGENCY FOUL - Unable to land aircraft within their safe endurance limits, followed by numbers and types of planes needing bases (Other carriers report with EMERGENCY SPACE).

EMERGENCY LAUNCH - Carrier(s) addressed-launch all aircraft as quickly as possible.

EMERGENCY OVERBOARD DISCHARGE CONNECTIONS - The emergency overboard discharge connections, port and starboard, are installed through the hull of each main transverse subdivision on the damage control deck.

EMERGENCY PREP CHARLIE - Carrier(s) addressed-recall and land all aircraft as soon as possible.

EMERGENCY SCRAMBLE - Carrier(s) addressed-immediately launch all available fighter aircraft as CAP. If all available aircraft are not required, numerals/type may be added.

EMERGENCY SPACE - I am able to land aircraft in addition to own, followed by numbers and types.

EMERGENCY STREAMER - Helicopter in forward flight effecting in flight recovery of up to 450 feet of sonar cable.

EMERGENCY WATER ACTIVATED REPAIR PATCH (EWARP) - A unique and easy to use pipe patch that can be used on many piping systems. The EWARP comes in a clear plastic package that includes a foil package containing the instant repair resin - coated cloth and a pair rubber gloves.

ENDING - Provides message integrity and signals the end of the message.

END FITTING - Attaches the span wire to the pelican hook on the swivel assembly.

EMP OR TREE DAMAGE - System degradation in electrical or electronic equipment that requires repair or replacement of damaged components. It can be caused by electromagnetic pulse (EMP) or transient radiation electronic effects (TREE).

ENGAGE - Take deliberate action with intention to destroy or damage.

ENGAGED (BRA) - Descriptive call indicating maneuvering with the intent to kill.

ENGAGEMENT - The actual "weapons release" toward the intended track.

ENGAGEMENT ASSESSMENT - The process of monitoring weapon effectiveness by determining potential battle damage.

ENLISTED PERSONNEL MANAGEMENT CENTER (EPMAC) - Command located in New Orleans, LA. Responsible for the qualitative and quantitative manning of your ship. (1) Placement (PO3 & up) / detailing (E-3 & below).(2) Distributes EDVR for update monthly.

ENLISTED SAFETY COMMITTEE - A committee consisting of the safety officer, division safety petty officers, and the chief master-at-arms. Identifies and discusses NAVOSH problems, enhances interdepartmental communication in mishap prevention, and submits issues and recommendations to the Safety Council.

ENTRY - Subsequent process of entering the detected track information into the Combat Direction System (CDS).

ENTRY LEVEL STATUS - The first 180 days of a period of continuous active military service.

ENVIRONMENTAL CONTROL GROUP (ECG) - A closed-loop air conditioning system that dehumidifies intake air, provides wave guide pressurization, and maintains environmental control within subsystems.

EQUINOCTIAL - Celestial Equator.

ESMO - Electronic Surveillance Measures Operator, monitors electronic environment using the AN/ALQ-142.

ESTIMATE - Provide a quick estimate of the height/depth/range/size of designated contact or I estimate that height/ depth/ range/size of designated contact is ____.

ESTIMATED CURRENT - Current that would result in the vessel being at its most likely location on the basis of all available data.

ESTIMATED POSITION (EP) - A plot that includes the effect of estimated current or the probable effect of an earlier determined actual current.

ESTIMATED TIME of ARRIVAL (ETA) - Time that the ship will arrive at its next station.

ESTIMATED TIME of DEPARTURE (ETD) - Time that the ship will depart its current location.

EVALUATION REPORT - A report documenting history of enlisted personnel in paygrades E-1 through E-6 career and job performance.

EVAPORATION - The action that takes place when a liquid changes to a vapor or gas. The process of boiling seawater to separate it into freshwater vapor and brine. Evaporation is the first half of the process of distillation.

EXECUTE (naval) (air) - Carry out search ordered. Carry out briefed action.

EXECUTIVE OFFICER (XO) - Officer responsible under the Commanding Officer for the organization, performance of duty, and good order and discipline of the ship.

EXIDE - Submarine contact is using battery propulsion.

EXPORTABLE TRAINING - Training that is exported to the commands who cannot take advantage of formal schools. Training is conducted to the trainee's command.

EXTEND (Direction) - Short term maneuver to gain energy, distance or separation normally with the intent of re-engaging.

EVOLUTION - A thorough evaluation process required for Lessons Learned to be promulgated into a U.S. Navy tactic; also used to mean any major activity or event, such as deployment or FLEETEX.

EXHAUST - Component designed to remove excess combustion gases away from the cylinders of an internal combustion engine.

EXHAUST VENTILATION - Removes contaminated air from a compartment or space so the fresh air finds its way into the space through any available openings.

EXPANSION - The increase in volume of working fluid (fuel) in an internal combustion engine after explosion.

EXPLANATION PAGES - Describes the principle of the Nautical Almanac and its arrangement.

EXPLOSIVE RANGE - A scale that indicates the explosive nature of gases or vapors. The relationship of the concentration of the vapor present; its temperature and pressure is expressed as a percent by volume in air. If the explosive range falls below the lower explosive limit (LEL), the mixture of air and vapor is too lean for an explosion. If the explosive range is above the maximum explosive range or upper explosive limit (UEL), the mixture of vapor and air is too rich to be explosive.

EXPLOSIVE - PROOF - Describes an apparatus, device, or equipment that is tested and approved for use in hazardous atmospheres, as defined in the National Electrical Code.. Explosive - proof devices are designed to withstand internal explosions and prevent hot vapors or particles from exiting before they become significantly cooled.

EXPOSURE RATE (RADIOLOGICAL) - The amount of ionizing nuclear radiation per unit of time to which a person, an object, or a system is subjected; the intensity of the radiation.

EXPOSURE RATE METER - A RADIAC instrument used to measure radioactive intensity or exposure rate. EXTENDED MANEUVERING INTERVAL - The maneuvering interval plus 500 yards, allows for station keeping errors.

EXTERIOR BALLISTICS - Refers to projectile motion after leaving the gun bore.

EYE - Normally permanent in the end of a line and may be aseized, spliced, or knotted loop.

EYE SPICE - Permanent eye in a line.

EYEBALL - 1. Fighter with primary visual identification responsibility. 2. EO/IR/NVD acquisition of an aircraft. Normally followed by ( ) number of aircraft observed.

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F/A-18 HORNET - Multi-mission fighter/attack aircraft, equipped with Link-4A.

F-14 TOMCAT - Designed to attack and destroy enemy aircraft, equipped with Link-4A and 4C, F-14D equipped with Link-16.

FACEPIECE - That portion of a respirator which covers the wearer's nose and mouth in a quarter - mask (above the chin) or half - mask (under the chin) or that covers the nose, mouth and eyes in a full facepiece. It is designed to make a gas - tight or particle - tight fit with the face and includes the headbands, exhalation valve(s), and connections for an air - purifying device or respirable gas source, or both.

FADED - Radar contact is lost. (Termination of track plotting is not warranted).

FAKER - A friendly track acting as a HOSTILE for exercise purposes.

FALCON - The air safety contact cell call sign established in ships that do not have a full control capability, during an exercise involving simulated attacks on the fleet either by carrier or land based aircraft.

FALLOUT - Radiological contamination formed in a nuclear surface burst consisting of radioactive particles and droplets that fall to the surface after the explosion, sometimes many miles away from the location of the detonation.

FAMISHED - Have you any instructions or information for me?

FAN___TACK___ - Left and right hand edges of jammed sector are___and__ .

FANFARE - Towed anti-acoustic torpedo noisemaker, which can be switched on/off while streamed.

FAST - Descriptive call (any detection) indicating target ground speed of 400 knots to 600 knots/mach 1.

FAST CRUISE - An exercise conducted prior to getting underway after a six week or longer period inport, or as necessary. It checks for proper equipment operation, crew familiarization, verifies the Watch, Quarter and Station Bill, and affords a chance to rehearse emergencies such as abandon ship, man-overboard, etc.


FATHOM - A unit of measure for water depth. One fathom equals six feet.

FATHOMETER - Device that determines the water depth by transmitting a signal from the ship to the ocean floor, and receiving a return bounce. It is sometimes referred to as an Echo Sounder.

FATHOMETER - Measures water depth by measuring how long it takes sound waves bounced off the sea floor to return to the ship.

FEATHER - Visual sighting of periscope wake.

FEED WATER - Seawater supplied to the distilling plant as the raw material for distillation. Also called seawater feed or evaporator feed.

FEELER - Shipborne fire control radar.

FEET WET/DRY - Flying over water/land.

FEET of PITCH - The distance a ship will move ahead or astern during one revolution of the propeller.

FENCE IN/OUT - Set cockpit switches as appropriate prior to entering/exiting the combat area.

FERRET - Airborne electronic reconnaissance activity or aircraft.

FEW - 2 to 7 aircraft.

FID - Tapered wood tool used to splice line.

FIBER CORE - Advantage of increased flexibility.

FIBER ROPE - Line fashioned from natural or synthetic fibers.

FIELD - The area occupied by sonobuoys operating in the LOFAR mode.

FIGURE of MERIT (FOM) - Measurement computed within the receiver, which calibrates receiver noise, time errors, the number of frequencies, and the number of signals received.

FIGURE EIGHT TURN - Used to secure a line to a bitt in a figure eight fashion.

FILLY - In AIR/SUB co-operation, an ESM homing method (submarine as transmitting unit).

FINAL EVALUATION PERIOD (FEP) - A non-graded evolution that tests the ability to conduct a 4-day battle problem, Total Ship Survivability Exercises (TSSEs), and material checks.

FINAL MULTIPLE - Combined score based on all advancement factors used to determine advancement status.

FIREBALL - A brilliantly glowing sphere of extremely hot gases formed by a nuclear explosion.

FIRE BOUNDARYMEN - The fire boundarymen set primary and secondary fire boundaries as directed by the repair party leader or fire marshal. They secure all doors, hatches, and openings in the boundary of the fire area. They remove or relocate combustibles as required. They cool boundaries with hoses as required. They are normally monitored by and report to the roving investigators.

FIRE CONTAINED - When one or more hose teams are making progress advancing on a fire and the fire is contained in a single area within a compartment. This term means the same as "Fire Under Control" and is used when reporting from the scene to avoid confusion with the term "Fire Out of Control."

FIREFIGHTER'S ENSEMBLE (FFE) - Designed to protect the fire fighter from short duration flame exposure, heat, and falling debris. The components of the firefighter's ensemble include the firefighter's coveralls, antiflash hood, damage control/firefighter's helmet, firefighter's gloves, and firefighter's boots.

FIRE CONTROL - The technique of aligning weapons to deliver effective fire to damage or destroy the selected target.

FIRE HOSE STATION - A fire hose station is the location where fireplug and associated equipment are stored; commonly referred to as either a fire station or a fireplug.

FIRE OUT - This is when all visible flames have been extinguished. Smoldering fires may still be present.

FIRE POINT - The temperature at which a fuel will continue to burn after it has been ignited.

FIRE TRIANGLE - Three components are heat, fuel, and oxygen. Fires are generally controlled and extinguished by eliminating one side of the fire triangle; that is, if you remove either the fuel, heat, or oxygen, you can prevent or extinguish a fire.

FIRE UNDER CONTROL - A fire under control is when one or more hose teams are making progress advancing on a fire and the fire is contained in a single area within a compartment.

FIREMAIN SYSTEM - Receives water pumped from the sea. It distributes this water to fireplugs, sprinkling systems, flushing systems, machinery cooling - water systems, washdown systems, and other systems as required. The firemain system is used primarily to supply the fireplug and the sprinkling systems; the other uses of the system are secondary.

FIRING CUTOUT CAMS - Prevent guns from firing into permanent parts of the ship's structure.

FIRING MECHANISM - Initiates the propellant train by detonating primer in the base of the propellant charge.

FIRING PIN - Makes contact with the primer; may initiate the primer by electricity, percussion, or both.

FIRST POINT of ARIES - The reference point for measuring angles for celestial bodies.

FISSION - A nuclear reaction in which the nucleus of an atom of a heavy element splits into the nuclei of lighter elements, releasing a tremendous amount of energy.

FISSIONABLE MATERIAL - Unstable isotopes of heavy elements, such as uranium and plutonium. They can be caused to fission, or split, when impacted by free neutrons. They are radioactive, giving off alpha particles as they decay.

FITNESS REPORT (FITREP) - A report documenting history of an officer's and Chief Petty Officers career and job performance.

FIX - A position established at a specific time to a high degree of accuracy; may be determined by any number of methods.

FIXED - Light shines with a steady, unblinking intensity and is always on.

FIXED AMMUNITION - Propelling charge and projectile physically joined and loaded into the gun.

FLAG - A flag is used for visual communications between ships. Each flag has a different meaning and when used together can relay messages.

FLAMMABLE RANGE/EXPLOSIVE RANGE - The range between the smallest and the largest amounts of vapor in a given quantity of air that will burn or explode when ignited.

FLAMMABLE and COMBUSTIBLE - A liquid with a flash point below 100 degrees Fahrenheit, as defined by the Department of Transportation (DOT), and the National Fire Protection Association (NFPA).

FLANKING (Direction) - Description of the bogey/bandit maneuvering to an aspect of 120° to 150° ("RED 1, contact, BULLSEYE 350/15, FLANKING west").

FLARES - Directive to deploy flares.

FLASH - The initial extremely bright pulse of light produced by a nuclear explosion. Typically used for message traffic dealing with initial contact with the enemy or urgent intelligence matters; used to report tropical storms; speed of service objective less than 10 minutes. Temporarily turn on pre-briefed IFF mode or system.

FLASH PHOTO - Ground fire control or missile guidance radar.

FLASHING (FL) - Duration of light is always less than duration of darkness.

FLASHOVER - A flashover is the transition from a growing fire to a fully developed fire in which all combustible items in the compartment are involved in fire.

FLASH POINT - The lowest temperature at which a flammable substance gives off vapors that will burn when a flame or spark is applied.

FLEET GUIDES - Covers ports of major interest to Naval vessels.

FLEMISH - A tight flat spiral on the deck used to "tidy up" and keep line neat.

FLIGHT DECK - In aircraft carriers the uppermost complete deck. It is the deck from which aircraft take off and land.

FLIGHT LEVEL - ICAO term giving height in hundreds of feet (e.g. FLIGHTLEVEL 250 equals 25.000 feet).

FLIGHT PATH CONTROL SYSTEM - Determines the flight plan necessary for target intercept, and generates orders to the attitude control system to achieve and maintain that path.

FLOAT - Directive or informative to expand the formation laterally within visual limits to maintain a radar contact or prepare for a defensive response.

FLOOD - Horizontal movement of water toward shore or up river.

FLOP - Shift the air patrol zone to the opposite side of the submarine patrol zone.

FLUID of FRICTION - Is the internal resistance to motion exhibited by a fluid.

FLUKES - Portions that dig into the sea bottom; edges are smooth to prevent damage to the ship's hull.

FLUSH (ING) - Go deep, or I am going deep.

FOOTPAD - In AIR/SUB co-operation, a visual radar homing method.

FORCE - A push or pull that tends to produce motion or a change in motion. Force is what makes something start to move, speed up, slow down, or keep moving against resistance (such as friction). A force may act on an object without being in direct contact with it. The most common example of this is the pull of gravity. Forces are usually expressed in terms of weight units, such as pounds, tons, or ounces.

FORCE - The action of one body on another tending to change the state of motion of the body acted upon.

FORCE CAP - Combat Air Patrol over FRIENDLY forces.

FORCE TRACK COORDINATOR - Selects target for all units to acquire for gridlock track correlation.

FORECASTLE DECK - This deck is above the main deck at the bow. The part of the main deck from the stem to just aft of the anchor windlass is the forecastle.

FORD - Assume intercept guard/watch on band or guard indicated.

FORWARD LOOKING INFRA-RED (FLIR) - Same function as IRDS but only scans forward of the aircraft.

FORWARD SPRING LINES - Tend forward from the ship to the pier and control the ship's aft movement.

FORWARD WELL DECK - Forward part of the main deck between the upper deck and forecastle.

FOX (NUMBER) - Simulated/actual launch of air to air weapons. ONE Air to air weapons. TWO Infrared - guided missile. THREE Active radar-guided missile.

FOXER - Towed anti-acoustic torpedo noisemaker, which cannot be switched off once streamed.

FOX MIKE - VHF/FM radio.

FRAP - The wrapping applied to the ends oother largeor otherlarge lines with small stuff to hold the lines together.

FRAGMENTATION WARHEADS - An explosive charge to fragment the case and impart kinetic energy to fragments which, in turn, damage the target.

FRAGMENTING - Produces a shower of fragments; utilizes mechanical time or variable time fuse; three types; High Capacity, High Explosive-Mechanical Time/Point Detonating, High Explosive-Controlled Variable Time.

FRATERNIZATION - Any personal relationship between an officer and an enlisted person, which is unduly familiar and does not respect differences in rank and grade.

FREAK - Frequency in MHz.

FREDDIE - Call sign for ACU.

_____FREE - Fire may be opened on any target(s) that has (have) not been identified as FRIEND. Weapon control status; prefixed by the appropriate weapon brevity word or general term WEAPON.

FREEBOARD - The distance from the waterline to the main deck.

FREEWHEEL - Confirm cancellation of a submarine generated search area.

FREEZE - Execute order to designated helicopter(s) to remain hovering in present position (cancelled only by MELT).

FREQUENCY - An expression of how frequently a periodic wave form or signal repeats itself at a given amplitude. It can be expressed in hertz (Hz), Kilohertz (KHz), Megahertz (MHz), etc.

FRIABLE - Material that can be crumbled, pulverized or reduced to powder under hand pressure, thereby releasing airborne fibers.

FRIEND - A track belonging to a declared friendly nation.

FRIENDLY - A positively identified friendly aircraft.

FROCKING - Personnel who have satisfied all advancement requirements, including passing the exam and being selected to the next higher paygrade, can be frocked to that paygrade prior to their advancement date. Frocked members are entitled to military identification cards, uniforms and privileges of the higher paygrade but do not get paid for the higher pay grade until actually advanced.

FROM - Originating activity.

FUEL - A solid, liquid, or even a vapor. Some of the fuels you will come into contact with are rags, paper, wood, oil, paint, solvents, and magnesium metals.

FULL SERVICE CHARGE - Gives projectile a high initial velocity and flat trajectory; uses full size cartridge case with a full service load of propellant.

FUME - Solid particles formed by condensation of metals from the gaseous state.

FURBALL - A turning fight involving multiple aircraft.

FUSE - Causes the warhead to explode at the desired time.

FUSE SETTER - Automatically sets projectile fuses on timed fuse projectiles prior to loading into the system.

FUSION - A nuclear reaction in which the nuclei of atoms of a light element are combined to form the nucleus of an atom of a heavier element, releasing a tremendous amount of energy.

FUSE - A device that detonates the projectile.

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G SERIES NERVE AGENTS - Tabun (GA), Sarin (GB), Soman (GD).

GADABOUT__-__ - Informative call indicating the upper limit of height sanctuary for fighters in the MEZ. ("Gadabout 25" means the upper limit of the height sanctuary is 25,000 feet; "Gadabout 16 to 24" means the height sanctuary is between 16,000 to 24,000 feet).

GADGET - Radar or emitter equipment (type of equipment may be indicated by a letter as listed in OPORD or APP-1). May be followed by the brevity word STATE to indicate the state of jamming (see STATE).

GALLERY DECK - First deck or platform below the flight deck.

GAMMA RAYS - A form of electromagnetic radiation, indistinguishable from X rays.

GAS EJECTION SYSTEM - Uses low-pressure air to purge the gun bore of residual gases from previous firings.

GAS FREEING - Operations performed in testing, evaluating, removing, or controlling hazardous materials or conditions within or related to a confined space which may present hazards to personnel entering or working in or adjacent to the space.

GASKET MATERIALS - Includes sheet and strip rubber, leather, canvas, rags, oakum, and paint.

GASSING SYSTEM - Used to pressurize the framework and to serve as a drogue to anchor the floating decoy.

GATE - Informative or directive call to fly at maximum speed (afterburner).

GEIGER (numerals) - Radiation intensity in roentgens.

GEIGER CHASE - A radio activity monitoring operation.

GEIGER SHIP - Radioactivity monitor ship.

GEIGER SOUR - Area contaminated, radioactivity noted.

GEIGER SWEET - Area uncontaminated. No radioactivity noted.

GENERAL APPRENTICESHIPS - Assigned to personnel in paygrades E-1 through E-3 to indicate eligibility for entry into various occupational fields.

GENERAL CHARTS - Use scales between 1:600,000 and 1:150,000 and are used for coastwise navigation outside of outlying reefs and shoals.

GENERAL MESSAGE FILE - Used to file messages that are sent to broad groups of activities within the Navy.

GENERAL MILITARY TRAINING (GMT) - Training in general military topics for all hands.

GENERATION - The act of generating (producing). As in a boiler generating steam.

GEOCENTRIC PARALLAX - The difference in the direction of the body due to displacement of the observer from the center of the earth.

GEOGRAPHIC RANGE - Maximum distance at which a light may be seen in perfect visibility by an observer whose eye is at sea level.

GEOGRAPHICAL POSITION - The fix that lies on a line connecting the point or body and the center of the earth.

GERONIMO - Tactical air observer.

GERTRUDE - Underwater telephone equipment.

GIMBALS (Direction) - Descriptive call indicating that a target is approaching lateral/vertical limits of the tracking radar.

GINGERBREAD - Voice imitative deception is suspected on this net.

GLOBAL - In AIR/SUB co-operation a plot-lock procedure.

GLOBAL POSITIONING SYSTEM (GPS) - 24 Earth-orbiting satellites that allow a GPS receiver to determine longitude, latitude and altitude of any position on Earth.

GLOBAL POSITIONING SYSTEM - A space-based radio-navigation system developed by the Department of Defense that consists of ground stations and 24 satellites that orbit Earth at an altitude of approximately 11,000 miles.

GLOWWORM - Flare dropping aircraft.

GO ACTIVE - Initiate Have Quick communications.

GO CLEAR - Use unencrypted voice communications.

GO SECURE - Activate encrypted voice communications.

GOALKEEPER - A ship stationed for close defense of a marked unit.

GOBLIN - Submerged object detected.

GOODWILL - Informative call indicating the boundary of an active MEZ.

GORILLA - Generic description of a large Hostile attack package. Additional descriptive commentary required to describe size and formations.

GRANDSLAM - Aircraft of a designated track (or against which the mission was tasked ) are shot down.

GRASSHOPPER GREEN (DIRECTION) - Emergency transit method of submarine areas by surface units. Descriptive call of a direction of no known enemy threats (Blue3, Green North).

GRIDIRON - Jamming signal appears on my P.P.I. scope or jamming signal prevents determination of range and bearing_____% of time.

GRIDLOCK POSITIVE/NEGATIVE - Satisfactory Gridlock has/has not been achieved.

GRIDLOCK - The process of matching the relative positions of locally held tracks with the positions of the reported tracks of the grid reference unit.

GRIDPOSIT CHARLIE____ - You are in centre of boat lane ______yards from____beach.

GRIDPOSIT LIMA LIMA/ROMEO ROMEO - You are outside of boat lane to left/right_____ yards from the beach.

GRIDPOSIT LIMA/ROMEO - Left/right of boat lane _____yards from beach.

GRIDSHIFT - Change of DLRP/grid origin.

GREAT CIRCLE - A circle formed on the earth's surface by any plane dividing the earth into equal halves.

GREEN BUOYS - Mark channels' port sides or indicate obstructions which must be passed on your port side (IALA B).

GREEN ZONE - Navy term that includes behaviors that are acceptable and are not considered sexual harassment.

GREENWICH HOUR ANGLE (GHA) - The angular measurement for a Celestial Hour Circle.

GREENWICH MEAN TIME - Mean solar time at the Prime meridian (0 degrees longitude).

GRID REFERENCE UNIT - Designated unit used as a reference point for other force units to adjust grid locations.

GRIDLOCK - The process of matching the relative positions of locally held tracks with the positions of the reported tracks of the grid reference unit.

GRIDLOCK REFERENCE UNIT - Unit with best navigational data used as the reference source for track correlation.

GROUND ZERO - The point of detonation of a nuclear surface burst on land.

GROUP - Descriptive call of radar targets within 3 nm and 20000 feet.

GROUP FLASHING (Gp Fl) - Combination of two patterns in one period.

GROWLER - LF beacon.

GUIDANCE - Provides automatic control of attitude and flight path.

GUIDANCE FAILURE - Results in inability of the weapon to sense its position relative to its target; subsequently, it will be unable to initiate actions to correct the flight path to intercept the target.

GUIDANCE SECTION - Senses the weapon's position relative to its target and initiates flight path corrections, located in the forward part of the weapon.

GUIDED WEAPONS - Provides a significant improvement in terminal accuracy because the guidance section within the weapon continuously determines its position relative to the target and, while in flight, corrects as necessary to achieve intercept.

GUINEA PIG - Radar simulator.

GUNS - An air-to-air or air-to-surface gunshot.

GUNNER's MATE - The line-throwing gunner or bolo heaver who passes the shot line to the other ship.

GUNWALES - The upper edges of the sides where the sheer strakes join the main deck.

GUN BATTERY - Organization of naval guns, classified by the battery's intended target.

GUN CONSOLE COMPUTER (GCC) - Communicates on primary and alternate data lines and is the primary interface between the Gun Weapon System (GWS) and the AEGIS Combat System. The GCC operational program.

GUN MOUNT - Located between the gun and the ship's deck; supports the gun and secures it to the ship; referred to with two-digit numbers aboard ship.

GUN MOUNT CONTROL PANEL (GMCP) - A touch-screen, interactive display that is located in the Gun Mount Loader Room.

GUN TARGET LINE - The line along which the gun mount must be pointed so the projectile will strike the target.

GYRO - Provides a frame of reference independent of ship's motion.

GYROCOMPASS - Used to accurately determine a ship's heading, pitch, and roll. A compass using a gyroscopemagnetizedf a magnetized needle mounted so that it’s axis always points to geographic north.

GYROCOSCOPE - A rotating wheel inside a frame that lets it’s axis turn in any direction.

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HANDYMAN - Helicopter in the ASUW support role. (no weapons)

HALF DECK - Any partial deck between complete decks.

HALF LIFE - The amount of time it takes for the level of radiation from any specified amount of a particular radioactive material to decrease by one half.

HALF THICKNESS - The thickness of shielding material necessary to reduce the intensity of gamma radiation that passes through it by half.

HAMMERLOCK MOOR - The port anchor is set starboard and the starboard anchor to port, with the bow between the crossing rodes Housing stopper Mounted closest to the hawse pipe.

HAND SIGNALS - Given by rig crew signalman (a junior BM); used to parallel all orders over sound-powered phones; given with 12-inch square paddles during the day, and lighted wands at night.

HANG FIRES - Previous documented discrepancies or concerns that still have not been corrected prior to an inspection.

HANGAR DECK - The deck on which aircraft are stowed and serviced when not on the flight deck.

HARBOR CHARTS - Use scales larger than 1:50,000 and are used for navigating and anchoring in harbors.

HARD HOSE - A hose condition that is likely to damage receiver's probe.

HARD PORT/LEFT STBD/RIGHT - High-G, energy sustaining turn.

HARPOON - All-weather, over-the-horizon, anti-ship missile system.

HAWSER LINE - Line larger than 5 inches used in towing, mooring, and similar operations.

HAWSE PIPE - Known as the chain pipe, is an opening near the ship's bow through which the anchor chain passes as it leaves the ship.

HAYRAKE (MEDIUM/ HIGH/ULTRA) - Homing signals in radio frequency band indicated.

HAZARDOUS MATERIAL (HM) - Any material that, because of its quantity, concentration, or physical, chemical, or infectious characteristics, may pose a substantial hazard to human health or the environment when released. Any material that because of its quantity, concentration, or physical or chemical characteristics, may pose a substantial hazard to human health or the environment when purposely released or accidentally spilled.

HAZARDOUS WASTE (HW) - A solid waste or combination of solid wastes, which because of its quantity, concentration or physical, chemical or infectious characteristics may; 1. Cause or significantly contribute to an increase in mortality or an increase in serious irreversible or incapacitating reversible illness; or 2. Pose a substantial present or potential hazard to human health or the environment when improperly treated, stored, transported, disposed of or otherwise managed. The term solid waste includes liquid, semi-solid, or contained gaseous material. Any discarded material (liquid, solid, or gas) that meets the definition of HM.

HAZARDOUS WASTE - Any discarded material that because of its quantity, concentration, or physical or chemical characteristics, may pose a substantial hazard to human health or the environment when purposely released or accidentally spilled.

HAZMAT - Hazardous Materials are materials that require special handling or disposal.

HAZING - Any conduct whereby a military member or members, regardless of service or rank, without proper authority causes another military member or members, regardless of service or rank, to suffer or be exposed to any activity which is cruel, abusive, humiliating, oppressive, demeaning, or harmful.

HEADS DOWN - Call to inform aircrew that leader or wingman is head down in the cockpit and wingman or leader is responsible for clearing.

HEADS UP - Alert of an activity of interest. (Normally followed by amplifying information).

HEADER - First part of a message and provides identification and accountability data for the message.

HEAT - Involves three methods - conduction, convection, and radiation.

HEAT CASUALTY - An individual unable to perform his or her duties as a result of heat exhaustion or heat stroke.

HEAT EXHAUSTION - A physical condition caused by exposure to high temperature combined with physical exertion, and marked by faintness, nausea, and profuse sweating; can be considerably reduced by proper physical conditioning and increased fluid intake.

HEAT STRESS - Heat stress is a pathological condition in which the body's cooling mechanisms are unable to dissipate the heat load generated.

HEAT STRESS PROGRAM - The Heat Stress Program establishes Navy policy and procedures for the control of personnel exposure to heat stress.

HEAT STROKE - A state of collapse or prostration, usually accompanied by high fever, brought on by exposure to heat; has a 50 percent mortality rate but accounts for only a small percentage of heat casualties.

HEATWAVE - In AIR/SUB co-operation, a VHF homing method. (Submarine as transmitting unit).

HEAVY - The largest group of factor bogeys/bandits.

HEAVY STRAIN - Tattletale is taut and line is at maximum working load, line is tight and popping.

HECKLERS - Night strike group.

HEIGHT of TIDE - The water level in relation to the reference plane of the chart.

HELOT - AEW surface terminal equipment.

HEAVING LINE - Weighted line used to pass mooring lines to piers and ships.

HEPA FILTER - A high efficiency particulate air filter. HEPA filters remove solid particles and liquid droplets from an air supply.

HEY RUBE - Need support. Come to my assistance.

HIGH (Maritime) - Between 25,000 and 50,000 feet. (Air) Descriptive call indicating the target's altitude is between 25,000 feet MSL to 50,000 feet MSL.

HIGHDRINK - Helicopter in flight refueling from a surface vessel.

HIGHWAY___ - Conduct Jezebel line of bearing search degrees from ___(point of reference).

HIGH-FREQUENCY RADIO WAVES - Provides accurate position location but are limited to a small, localized area.

HIGH ALTITUDE BURST - A nuclear detonation that takes place at an altitude where the atmosphere is so thin that the interaction of the explosion with the atmosphere is drastically different from that of bursts at lower altitudes; nominally, a burst at an altitude above 100,000 feet.

HIGH COMMAND NET - High frequency and satellite unencrypted system with encrypted voice capability, composed of three smaller networks under the cognizance of an area control station.

HIGH PRESSURE AIR SYSTEM(HP) - A system which is designed for a nominal operating pressure above 1000 psig.

HIGH-SIDE - Designates the remainder of the refrigeration system, excluding the low-side, that is under high pressure. It includes the discharge line, condenser, receiver, liquid line, and the compression discharge manifold. The term is also used to designate the condensing unit.

HIGH WATER/LOW WATER - Maximum and minimum height of the water during one complete tidal cycle.

HIMALAYAS - In AIR/SUB co-operation, the aircraft approaches the contact area directly without homing assistance from the co-operating submarine.

HIT(s) - 1. (A/A) momentary radar return(s) in search. (Indicates approximate altitude information from fighter). 2. (A/.G) Weapons impact within lethal distance.

HOCKLE - Kink in an inner yarn that forces it to the surface.

HOLD DOWN - Directive to key transmitter for DF steer.

HOLD FIRE - Do not open fire/cease firing (missiles in flight must be destroyed). The direction to hold fire should be repeated at the end of a transmission.

HOLDING HANDS - Aircraft are joined or in close formation.

HOMEPLATE - Home airfield/carrier.

HOMER - Any homing beacon equipment. Type may be specified (e.g. LF, VHF, radar etc.).

HOMING - Friends returning for recovery.

HOMING GUIDANCE SYSTEMS - Seeks distinct energy emissions from a target.

HOOK (Direction) - Directive to perform an in-place 180 degree turn.

HOOK BOLT - A long bolt that is usually fabricated from round steel stock. Hook bolts come in a variety of diameters and shapes.

HOOK LOCKER - The unit specified has been entered as a participant on link 11 but is not active on the net.

HOOKER - Fishing or other small craft.

HOOTER - Jammer.

HORIZON DISTANCE - Line where earth and sky appear to meet.

HORIZONTAL LOOP FIREMAIN SYSTEM - Consists of two-single fore-and-aft, cross-connected piping runs. The two individual lengths of piping are installed in the same horizontal plane (on the same deck) but are separated athwartships as far as practical.

HORIZONTAL PARALLAX - When a celestial body is in the horizon, usually used only in reference to the moon .

HOPPER - Hovercraft/Air Cushion/Ground effect machines.

HOSEMAN - A hoseman runs the attack hose from the fireplug to the scene, and you will keep the hose from getting fouled while fighting the fire and relay spoken messages and orders between the on-scene leader and the nozzleman.

HOSTILE - A track declared to belong to any opposing nation, party, group or entity, which by virtue of its behavior or information collected on it such as characteristics, origin or nationality contributes to the threat to friendly forces.

HOT (maritime) - Sonar contact is held. (air) 1. (a) Refers to the start of the CAP leg in the direction of the threat. (b) High aspect target. 2. (a) Attack geometry will result in roll out in front of the target. (b).Group heading towards friendly aircraft. 3. Ordnance employment authorized, expected or completed (A/G), Cleared In/OFF.

HOT PIPE - Snorkel or I am snorkeling.

HOT SPOT - A localized area of a ship where chemical or biological contamination is considerably above the average of the surrounding area.

HOT SURFACE - NSTM, chapter 505, defines a hot surface as 650°F (343°C) for lubricating oil and hydraulic oil systems and 400F (205°C) for all other flammable liquids.

HOT WORK - Any operation that involves flame, spark, or temperatures in excess of 2050°C (4000°F).

HOTEL FOX - HF radio.

HOTEL FOX - HF radio.

HOUR CIRCLES - The great circles around the Celestial Sphere passing through the Celestial Poles, just as the meridians of longitude are the great circles around the Terrestrial Sphere passing through the earth's poles.

HOUSE SADDLES - Aluminum casting with a female split clamp fitting on one end and a male split clamp fitting on the other.

HOUNDOG - Call made by free fighter indicating that he is in a position to employ weapons.

HOUSING - Contains the breech mechanism; has the barrel fitted into its forward end; moves within the slide during recoil.

HOVERTAC - An attack conducted by a dipping helo on its own target, while maintaining sonar contact.

HUFFDUFF - HFDF equipment or unit fitted with HFDF equipment.

HUHGES IMPROVED TERMINAL BROADCAST - Provides access to air or ground-based surveillance systems.

HULL CONTOUR LIGHTS - Small lights used to outline the shape of a ship's hull when performing night underway replenishments.

HUMIDITY - The vapor content of the atmosphere. Humidity can vary depending on air temperature; the higher the temperature, the more vapor the air can hold.

HUSH - Execute emission control in accordance with emission control policy or the emission policy in force as indicated.

HUSKY - AIM-120 supported to HPRF active.

HYCHECK VALVE - Diaphragm type, fail open, seawater pressure-operated control valve, which allows the flow of seawater from the firemain system to be mixed with AFFF concentrate.

HYDRAULICS - Engineering science pertaining to liquid pressure and flow.

HYDROGEN SULFIDE (H2S) - Generated in some fires. It is also produced by the rotting of foods, cloth, leather, sewage, and other organic materials.

HYDROLYSIS - The decomposition of a chemical compound by reaction with water, useful in decontamination of some chemical agents, often accelerated by acid or alkaline solutions or by the presence of hypochlorite.

HYTROL VALVE - Diaphragm type, fail open, seawater pressure - operated control valve that controls the flow of AFFF solution to systems.

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I GO (___) - I am leaving my patrol mission in _____ minutes.

I HOLD - This may be used when a unit reports a track.

I MAKE____ - My information to amplify or clarify the appropriate plot, which differs from that reported previously is ____.

I STAY(____) - I'm remaining with you on patrol/mission_____ hours.

I WANT - Originator requires reporting responsibility of nominated track.

IALA A - Regions that make up Europe, Africa, Australia, New Zealand, and most of Asia.

IALA B - Regions that make up North and South America, Japan, the Philippines, and South Korea.

ID - Directive to intercept and identify the target or ID accomplished, followed by type of aircraft.

IDENTIFICATION FRIEND or FOE (IFF) - Equipment that was developed to facilitate identification of all combat participants.

IDENTIFY SQUAWK FOUR - Re-identify target/hostile aircraft.

IDENT A-F - Perform relevant identification action.

IGNITION - The act or action of causing a substance to burn; the means whereby a material starts burning.

IGNITION LAG - Delay between the time fuel is injected and the time it reaches the self-ignition point.

IM-43/PD - Identical to the IM-9/PD except in range. The IM-143/PD indicates gamma radiation dose in the range of 0 to 600 R.

IMMEDIATE (O) - Typically used for message traffic that gravely affects national forces (e.g., military intelligence information); speed of service objective is 30 minutes.

IMMEDIATE FAMILY - Spouse, son, daughter, step-child, brother, sister, parent, step-parent, person acting in place of the parent for 5 years prior to the member reaching the age of 21, or any bona fide dependent.

IMMEDIATELY DANGEROUS TO LIFE OR HEALTH (IDLH) - Any atmosphere that meets one or more of the following conditions-flammable vapors at a concentration of 10% or greater of the lower explosive limit (LEL); an oxygen content of less than 19.5% or greater than 22%; the presence of toxicants above a level that would allow personnel to escape within 30 minutes without impairment or irreversible health effects.

IMMINENT DANGER - A condition that immediately poses a threat of serious injury, illness, or the loss of life.

IMPACT - Projectile strikes the target; movable parts driven forward with great force causing the fuse to detonate.

IMPACT DIRECTOR - Professionally trained Navy drug and alcohol counselors, who administer the IMPACT program (PREVENT and AWARE are similar programs) at numerous locations.

IN (Direction) - Informative call indicating a turn to a hot aspect relative to a threat/target. Opposite of OUT.

INCAPACITATING AGENTS - Used to wage and win a war without resorting to the massive killing, enormous destruction of property, and immense monetary cost.

INCENDIARIES - Incendiary weapons, unlike other chemical agents, are concerned primarily with material damage, rather than with inflicting casualties.

INCOMPATIBLE HM/HW - Any hazardous materials that react with each other to produce undesirable products.

IDENTIFICATION - The process of determining whether a track is friendly or hostile.

INDEX SHEET - A sequential list of all tag-outs issued. It provides a ready reference of existing tag-outs, ensures sequential issuing of tag-out serial numbers, and assists auditing of the tag-out log.

INDIA - Mode IV.

INDIANS - Ships of a Surface Action Group (SAG).

INDICATE(ING) - A command to set (or have set) a particular speed. May be in knots indicated or in Mach, depending upon the controlled aircraft expressed as follows; knots indicated in three digits, i.e. three five zero (350); Mach - two or three digits with the word point separated whole numbers from tenths and hundreds, i.e. one point one three (1.13) or point nine three (.93).

INFOTAC - A type of vectored attack, used when the directing unit broadcasts sonar contact information and the attacking aircraft must solve his own fire control solution.

IN HOT/DRY - Aircrew has begun final attack run and intends to expend ordnance (hot) or to conduct a simulated attack without expending ordnance (dry).

INDIRECT FIRE ATTACK - Indirect fire attack is a method of attacking a fire in which fire fighters outside the fire area discharge water fog into the fire area through a cracked open door or a bulkhead or overhead penetration.

INFORMATION - The meaning that a human assigns to data by means of the known conventions used in their representation. (Joint Pub l-02).

INERTIAL GUIDANCE - A refinement of preset guidance.

INITIAL VELOCITY (IV) - Speed in feet per second (fps) at the gun's muzzle.

INDIVIDUALLY DOGGED WATERTIGHT DOORS - These doors provide access/egress to compartments that are not high usage spaces, which do not require rapid access, such as paint lockers, deck gear lockers, or storerooms.

INERT GAS - A gas mixture that is nonflammable, will not support combustion, and contains a maximum of 3% by volume of oxygen.

INERTING - A process in which an inert or nonflammable gas, such as carbon dioxide, helium, argon, or nitrogen, is introduced into an atmosphere to such a degree that the oxygen/flammable vapor content of the atmosphere will not burn or explode.

INERTIAL NAVIGATION SYSTEM - Provides continuously accurate dead reckoning position, velocity, and attitude indication; uses gyroscopes, accelerometers, computers/processors, and control electronics; accuracy of INS degrades with time.

INFRA-RED DETECTION SYSTEM (IRDS) - 360 degree infra-red scanning system used to detect heat signatures beyond visible light spectrum; useful in detecting submarines close to the surface.

INFO - Information addee(s).

INHALATION HAZARD - Since the standard protective mask provides full-face coverage, the terms eye- respiratory hazard and inhalation hazard are used synonymously.

INHAUL LINE - Moves the trolley toward the delivery ship.

INITIAL CERTIFICATION - The certificate issued by gas free engineering personnel as a result of initial testing.

INITIAL CASREP - Identifies, to an appropriate level of detail, the status of the casualty and parts and/or assistance required to affect the repairs.

INITIAL NUCLEAR RADIATION - The radiation (essentially neutrons and gamma rays) that is emitted by the fireball and the cloud during the first minute after detonation. All significant neutron radiation is emitted in less than 0.1 second and gamma radiation up to 20 or 30 seconds, depending on weapon yield.

INITIAL QUERY - MIF units will query any vessel appearing to enter or depart Iraq to determine intentions; questions include vessel name and flag, cargo specifics, passengers, port of registry, and last and next port of call.

INITIAL TESTING - Testing conducted on a confined space when the space is first opened after a period of closure or servicing.

IN-PORT FIRE PARTY - The in-port fire party will function as a repair party while the ship is in port. CBR defense operations are not a normal evolution for an in-port fire party.

IN THE DARK - Not visible on my scope and any position information is estimated.

INSPECTOR GENERAL INQUIRY REQUEST - A request for an inquiry into matters that a member feels needs to be answered by the Navy Inspector general.

INSTANT - The signal is to be retransmitted as soon as possible.

INSTRUCTION DRILL (NCO-30-SF) - Consists of quarterdeck breech attempt and a review of the shipboard security program.

INSTRUMENT LOG - The control document for administering labels (OOC and CAL). It provides sequential listing of all OOC and CAL instruments.

INSUBORDINATION - Someone who is disobedient to authority.

INTAKE - Component designed to supply air required for combustion.

INTEL - Information or source that is of a higher classification than can be discussed or revealed on this circuit.

INTELLIGENCE - The product resulting from the collection, processing, integration, analysis, evaluation, and interpretation of available information concerning foreign countries or areas. (Joint Pub l-02).

INTERCOM UNITS - The units provide fast and dependable two-way communication between DCC and each repair party locker.

INTERFERENCE - Electromagnetic radiation prevents or interferes with maintaining contact.

INTERLOCKS - Safety devices designed to stop equipment from operating if certain conditions are met.

INTERROGATE - Interrogate the designated contact/track or raid on the IFF-mode indicated.

INTERRUPTED QUICK FLASHING (IQ) - Like quick flashing with one extended moment of darkness in each period.

INTERIOR BALLISTICS - Refers to projectile motion inside the gun bore including powder combustion, gun pressure, pressure variations, and velocity.

INTER-DEPLOYMENT TRAINING CYCLE (IDTC) - A schedule of training that is broken down into four areas which combine classroom courses and practical exercises, ashore and at sea.

INTERFERENCE - Electromagnetic energy that decreases clear reception of radio or radar signals.

INTERNAL HAZARD - Radioactive material that is taken into the body by respiration, ingestion, or absorption through open wounds into the bloodstream.

INVESTIGATOR - Investigators are assigned to repair lockers to ensure that no further damage occurs outside the boundaries of the existing casualty. Investigators normally operate in pairs, traveling assigned routes and reporting conditions to the repair locker.

INTRUDER - An individual, unit or weapon system in or near an operational or exercise area, which represents the threat of intelligence gathering or disruptive activity.

ION - An atom or molecule that has lost an electron and taken on a positive electrical charge or one that has gained an electron and become negatively charged.

IONIZATION - A process in which electrically neutral atoms or molecules are changed into charged particles by the loss or addition of electrons.

IONIZING RADIATION - Energy in the form of electromagnetic emissions or subatomic particles that interact with electrically neutral atoms or molecules, changing them into charged particles (ions).

IRRITANT - Substance which when in contact with living tissue can cause burning or itching.

ISOCHRONOUS GOVERNOR - Provides constant speed with varying loads.

ISOLATION - A process whereby a confined space is removed from service and completely protected against the inadvertent release of hazardous material into the space. Isolation can be accomplished by blanking off; blocking/disconnecting all mechanical linkage, electrical isolation, or other specified means.

ISOLATED DANGER MARK - On or above an isolated danger; red with black horizontal bands and two black vertically spaced balls for topmark.

ISOMETRIC DIAGRAM - The isometric damage control diagram diagrams each deck or platform and is shown at a separate level. They also show piping systems as close as possible to their actual shipboard locations. Usually the isometric damage control diagrams are not drawn to scale.

ISOPHASE (Iso) - Duration of darkness is equal to duration of light.

ISOTOPES - Different forms of a chemical element that have the same chemical characteristics but different atomic masses due to variations in the number of neutrons.

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JP-5 - A high flash point, kerosene-type aircraft turbine fuel, specifically designed for storage and use on naval ships.

JACKAL - Surveillance network participating group (NPG) of link-16/TADIL J.

JEZEBEL - Jezebel operations.

JEZEBEL KIT - Jezebel equipment.

JINKING - Unpredictable maneuvers, i.e. to negate a weapons tracking solution.

JOB SCREENING - The process requiring the work broker to approve or disapprove each work request; assign the appropriate level of accomplishment (O, I, or D Level) to each job; assign each job to an availability; review and enter the screening actions taken for each proposed work item; and create a list of work items for a work package.

JOE - AEW IFF equipment.

JOINING - Informative call of an aircraft joining or rejoining the formation.


JOINT FORCE - A general term applied to a force composed of significant elements, assigned or attached, of two or more Military Departments, operating under a single joint force commander (JCS/J7/Joint Doctrine Division memo dtd 20 Oct 94).

JOINT TASK FORCE - A joint force that is constituted and so designated by the Secretary of Defense, a combatant commander, a subunified commander, or an existing joint task force commander (JCS/J7/Joint Doctrine Division memo dtd 20 Oct 94).

JOKER (maritime) - A friendly track acting as a SUSPECT for exercise purposes. (air) Fuel state above BINGO at which separation/bugout/event termination should begin.

JTFEX - Fleet exercise (FLEETEX)/Joint Task Force Exercise (JTFEX) is a CINC directed exercise designed to build upon previous demonstrated Battle Group (BG) competencies across all warfare areas. JTFEX consists of a nominal 21 days underway, usually conducted six to eight weeks prior to deployment.

JUDY - Informative call indicating that the AD fighter has radar/visual contact and is taking control of the intercept.

JUDY ANGLE - I have a contact and am tracking over intercept by angle lock-on; continue to give frequent range data.

JUG - Submarine communications buoy (not trailing antenna).

JULIE - Explosive Echo Ranging (EER).

JUMP(ing) BREAK(ing) - DIP and proceed(ing) in direction or to position indicated to DIP again.

JURISDICTION - The limits or territory within which authority may be exercised; the power, right, or authority to interpret and apply the law.

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KE - Goblin detected by electronic surveillance.

KEEL - The keel is the backbone of the ship.

KEY - Communication signal.

KEEP CLEAR - Keep clear of contact bearing_____degrees (true or magnetic)_____miles from me or reference point.

KH - Goblin detected by hydrophone effect.

KICK (Degrees RH/LH or heading) - Informative/directive call indicating a defensive check turn in a specified direction.

KICK__TACK__ - Shift line number (line identifier) to frequency column (column identifier) as indicated.

KILOTON - Nuclear weapon yield equivalent to the explosive energy released by 1,000 tons of TNT.

KILL - In training, a fighter call to indicate kill criteria have been fulfilled.

KILO - A friendly track of special interest.

KINETIC ENERGY - Energy in motion producing work.

KINGPIN - Reference position established arbitrarily by an aircraft for reporting the position of contacts or datum's.

KINGPOST - Short, strong, upright post used to support cargobooms, or the structure used to support the STREAM rig on a delivery ship.

KK - Two-letter general type designator for Goblin.

KNOCK IT OFF - Directive to cease air combat maneuvers/ attacks/activities. (Normally used in a safety context).

KNOT - A unit of speed equal to one nautical mile per hour and equals 1.15 miles per hour.

KNUCKLE - Disturbed water caused by maneuvering submarine or surface craft.

KOBOLD - Informative call indicating that a specific MEZ is not active. (Opposite of OILFIELD).

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LADDER - Three or more groups/contacts on the same azimuth but separated by range.

LAME DUCK - An aircraft in a minor state of emergency resulting from ordnance or radio failure, oxygen leak, or other cause.

LAMPS - Lighting is to be restricted as indicated.

LANCE - Active shipborne sonar.

LANCE ATTACKER - Active fire control sonar.

LANCE-DIVER - Variable depth sonar.

LANCE SEARCHER - Active medium or long range sonar.

LANCE SOUNDER - Hull mounted, downward looking classification sonar.

LAP COMPLETED - One causeway has been placed alongside another and secured.

LASER ON - Directive or informative call to start laser designation.

LATE____ - Your wave is late indicated minutes.

LATERAL SYSTEM - Buoys used to mark sides, junctions, and bifurcations in channels.

LATENT HEAT - The addition of more heat to a substance that has reached the necessary temperature at a given pressure to change states that causes the substance to change states. Adding latent heat to boiling water does not get the water any hotter, but changes the liquid (water) into a gas (steam).

LATENT HEAT OF FUSION - Heat that is given off or absorbed by a substance while it is changing its state.

LATENT HEAT of VAPORIZATION - The amount of heat (energy) required to change the state of a substance from a liquid to a vapor without a change in temperature.

LATITUDE - The angular position of an object on the earth's surface, measured in degrees, minutes, and seconds of an arc from the equator North and South to the poles. A parallel. The angular distance north or south from the equator.

LAY-to-ASSIGNMENT - Queried ships are sent to a pre-assigned point to anchor while awaiting inspection; located outside normal traffic flow; allows monitoring of multiple vessels.

LAZY - Equipment indicated is at standby.

LEAD LINE - A hand-held line with attached marks fastened to a sounding lead used for determining water depth.

LEAD-TRAIL - Tactical formation of two aircraft or groups separated in range or following one another.

LEADING CHIEF PETTY OFFICER (LCPO) - Assists the division officer in administering, supervising, and training division personnel.

LEADING PETTY OFFICER (LPO) - Assists the division officer and Leading Chief Petty Officer in administering, supervising, and training division personnel.

LEGAL OFFICER - An advisor to the CO and the XO concerning the interpretation and application of the UCMJ, the Manual for Courts-Martial, and other military laws and regulations.

LEAKER - Airborne threat has passed through a defensive layer.

LEASH - Wire guided torpedo.

LETTING-GO BEARING - Also known as a drop bearing; a predetermined bearing drawn from the intersection of the letting-go circle with the approach track to a convenient landmark or NAVAID, generally selected near the beam.

LETTING-GO CIRCLE - Circle drawn around the intended position of the anchor at the berth's center with a radius equal to the horizontal distance from the hawse pipe to the pelorus (A fixed compass card on which bearings relative to a ship's heading are taken).

LEVEL - Vertical movement of the deck plane within the plane containing the line-of-sight.

LEVEL - Contact designated is at your angels.

LEVEL 1 ALCOHOL TREATMENT - A command level treatment for non-alcohol dependent personnel that may include counseling, motivational education, and awareness and prevention education (PREVENT).

LEVEL 2 ALCOHOL TREATMENT - An outpatient Counseling and Assistance Center (CAAC) program that includes counseling, education, and support, which provides treatment, that requires a higher level of rehabilitation than the command is able to provide.

LEVEL 3 ALCOHOL TREATMENT - A residential treatment program for alcohol dependent personnel who require more intensive therapy than outpatient treatment allows.

LEVEL FIVE - Use of intermediate weapons; provides control when deadly force not authorized; regular practice required.

LEVEL FOUR - Hard empty hand control; kicks, strikes, and blocks against an active aggressor resisting direction; may result in injuries.

LEVEL ONE - Lowest force level; primarily relies on presence of armed boarding team members.

LEVEL SIX - Use of deadly force; may cause death, permanent injury, or disfigurement; used when team member threatened with serious bodily harm.

LEVEL THREE - Soft, empty hand control, non-injurious manipulation of passive resistor; may cause some pain but no injury.

LEVEL TWO - Verbal commands; clear professional commands elicit proper responses; ensure crew understands commands.

LICENSED INDEPENDENT PRACTITIONER (LIP) - Determines the physical or psychological dependency of an individual using alcohol/drugs, and then identifies the appropriate method of treatment.

LIFEGUARD - Submarine or surface ship designated for SAR operations or a submarine or surface ship stationed geographically for precautionary SAR assistance. Also the name of the units designated to recover a man overboard for vessels conducting alongside operations.

LIFEGUARD STATION - A position approximately 1000 yards behind ships performing an UNREP.

LIGHT BLUE - Training ammunition, including missiles.

LIGHT GREEN - Smoke producing or marker projectile.

LIGHT LIST - Assists in locating, identifying, and using aids to navigation in the US and its territories.

LIGHT LIST - Covers all lights, buoys, day beacons, ranges, fog signals, radio beacons, and radar beacons in US waters.

LIGHTS ON/OFF - Directive to turn on/off exterior lights.

LIGHT STRAIN - Tattletale is not under tension (slack). No strain on the line.

LIGHT RED - Incendiary or highly flammable projectile.

LIGHT TOWERS - Large towers supported by steel piles that provide platforms for lights, fog signals, and radio beacons.

LIGHTHOUSES - Primary lights that are distinctive structures exhibiting major lights to warn of dangers or guide ships into ports.

LIGHTWEIGHT (Danforth) ANCHOR - Primarily used on smaller ships.

LIMITED PROTECTION (LP) ZONE - A zone within a collective protection system that provides protection against liquid and solid CBR agents but not agents in vapor form.

LINEAR DEFLECTION RATE - Change of the target's bearing.

LINEAR ELEVATION RATE - Change of the target's elevation.

LINE ABREAST - A formation of two or more ships lined up on each other's beam. Two contacts within a group side-by-side.

LINE of BEARING - A formation formed in either a relative or true bearing from the guide.

LINE of FIRE (LOF) - The line along which the gun mount must be pointed so the projectile will strike the target.

LINE of POSITION - A line established by observations or measurement on which a vessel can be expected to be located. It takes at least three LOPs are necessary to determine a fix.

LINE of SIGHT (LOS) - The straight line between the observer and the object observed.

LINER - Fly at speed giving maximum cruising range.

LINE-THROWING GUN - Shoots shot line to the receiving ship by propelling a buoyant rubber projectile attached to a spool of international orange shot line.

LINK - The physical interconnection between two systems in a network. A link may consist of a data communications circuit or a direct channel (cable) connection.

LINK-EX - Link exercise for Link 11 capable ships to exchange position and contact data between platforms.

LINK-11 - Provides high-speed, computer-to-computer exchange of real-time digital tactical information among ships, aircraft, and shore installations.

LINK-11 - High speed computer-to-computer exchange of digital tactical information among ships, aircraft, and shore installations.

LINK-14 - Enables ships without advanced data link capability to receive picture compilation and status information to remain informed of tactical situations.

LINK-14 - Broadcast HF teletype link for maritime units designed to transfer surveillance data from ships with tactical data processing capability to non-tactical data capable ships.

LINK-14 Broadcast Unit - Unit designated by the OTC or AAWC to transmit data over Link-14.

LINK-16 - Enables exchange of real-time tactical data among capable units.

LINK-16 - Nodeless, high-capacity, multifunctional, secure, jam-resistant tactical data link for exchange of fixed format and voice messages.

LINK-4A - Fully automatic, high-speed data transmission system used for aircraft control.

LINK-4A - Automatic high-speed data transmission system used for aircraft control.

LINK COORDINATION NET - Used to coordinate issues concerning tactical data link systems, EEIs include NCS/GRU assignment, net entry, and resolving PU transmission problems.

LINK MONITORING SYSTEM - System used to analyze Link-11 performance.

LIST of LIGHTS - Assists in locating, identifying, and using aids to navigation all over the world.

LIST of LIGHTS - Covers all lights, buoys, day beacons, ranges, fog signals, and radio beacons in waters outside the US.

LISTEN - Cease echo ranging and commence passive search.

LISTENER - Passive search/attack sonar.

LITTLE JOE - AEW IFF transponder.

LOAD SHEDDING - The process where preselected loads are removed from a generator to ensure continuity of electrical power to more critical equipment. Load shedding can be activated manually by an operator or automatically by an overload system installed in the ships main switchboards.

LOCAL AIR WARFARE CONTROL - Used for force air defense coordination and associated reporting requirements, EEIs include unit tasking, control or coordination of ship and air assets, and contact reporting.

LOCAL CONTROL - When guns are controlled through signals originating in the gun mount itself, or in the upper handling room; used if there is a casualty in the fire control system.

LOCAL CONTROL PANEL - The only location from which threat criteria and engagement data can be entered into the Weapons Control Group Computer, calculates true and relative bearings, and functions as a maintenance control panel.

LOCAL HOUR ANGLE (LHA) - To measure the Hour Angle of a celestial body from the position of the observer.

LOCAL MANUAL OPERATION - Direct manual positioning of a control valve or power operator by means of a handwheel or lever.

LOCAL MEAN TIME (LMT) - A standard meridian that is the nearest meridian exactly divisible by 15.

LOCAL MEAN TIME (LMT) - Used to determine time of sunrise, sunset, and twilight.

LOCAL NOTICES to MARINERS - Published by each Coast Guard district and contain local information .

LOCATOR - Messages to report on surface, subsurface, air, or special interest units.

LOCATOR SHEETS - Used to indicate that a message is being kept in a file other than the one it would normally be placed.

LOCKED (BRA) - Informative call indicating final radar lock on; radar sort is not assumed/assured ("RED 1, LOCKED 090/12, 2,000 feet").

LOCKED SHAFT - Locked shaft refers to a propulsion shaft that is unable to rotate and propel the ship through the water.

LOFAR - Jezebel operations in Lofar mode.

LOG - A log is a written account of a specific nature. Examples of logs used onboard a ship are Surface Contact, Watch, ES and Wake up logs.

LONG FLASHING (LFL) - One long flash (at least 2 seconds) in a period.

LONG SHOT - Submarine is believed to have fired from outside the screen.

LONG SPLICE - Strands unlaid three times as much as for a short splice.

LONG STOP - Standby to assist in attacking raid indicated.

LONGITUDE - The angular position of an object on the earth's surface, measured in degrees, minutes, and seconds of an arc from the Prime Meridian East and West through 180 degrees. A meridian. The angular distance east or west from the prime meridian that runs through Greenwich, England. ( a parallel).

LONGITUDINAL FRAMES - Frames running parallel with the keel.

LOSS - A loss is when classified information cannot be physically located or accounted.

LOST CONTACT - Previous contact of Judy lost, provide target information.

LOST___ - Reporting unit doesn't hold contact anymore for which it has reporting responsibility.

LOOSE CONTROL - A form of aircraft mission control in which the aircraft commander selects his own speed, altitude, heading and appropriate tactics required to accomplish the assigned task.

LOW (Maritime) (Air) - Between 500 and 5,000 feet. - Descriptive call indicating the target's altitude is between 500 feet AGL to 5,000 feet AGL.

LOW PRESSURE AIR SYSTEM (LP) - A system which is designed for a nominal operating pressure of 150 psig and below.

LOW-SIDE - Low-side is that part of the refrigeration system lying between the expansion valve and the suction valve in the compressor. It includes the evaporating or cooling surface, the suction line, and the compressor crankcase, which is the portion of the system under suction pressures. Sometimes the term is used to designate the evaporator coils.

LOWER CARRIAGE ASSEMBLY - Supports upper carriage and gun mount power drives.

LOWER EXPLOSIVE LIMIT (LEL) - The minimum percent by volume of a gas that, when mixed with air at normal temperature and pressure, will form a flammable mixture.

LOWER FLAMMABLE LIMIT (LFL) - The minimum concentration of a combustible gas or vapor in air, usually expressed in percent by volume at sea level, which will ignite if a sufficient ignition source of energy is present.

LP VITAL/NON-VITAL AIR - Low pressure air systems are usually divided to ensure that non-vital uses of air are automatically secured on a loss of system pressure.

LUMINOUS RANGE - Maximum distance at which a light may be seen under existing meteorological conditions.

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MACHINERY SPACE - Machinery space is main and auxiliary machinery spaces that contain any of the following: installed fire-fighting systems, oil-fired boilers, internal combustion engines, gas turbines, or steam turbines.

MACK NO - I have reached maximum speed and am not closing my target.

MACK YES - I have reached maximum speed and am closing my target.

MADCAT MAD - Fitted helicopters.

MADDOG - Visual AIM-120 launch.

MADMAN - I have a MAD contact.

MAGAZINE - Space dedicated to the stowage of ammunition.

MAGAZINE SPRINKLER SYSTEMS - Sprinkler systems are used for emergency cooling of, and fire fighting in, magazines, ready-service rooms, ammunition, and missile handling areas. A magazine sprinkler system consists of a network of pipes. Magazine sprinkler systems can completely flood their designated spaces within an hour.

MADVEC - Vectored MAD verification run.

MAGNETIC - Refers to the magnetic meridian.

MAGNETIC NORTH - The north direction shown on a compass. The true north pole and magnetic north pole are about 1500km apart.

MAGNETIC ANOMALY DETECTOR (MAD) - Passive system used to detect differences in earths magnetic field caused by submarines' hull, localization function - not used as a search sensor, SH-60 uses towed device to reduce aircraft magnetic noise.

MAGNUM - Informative call indicating a (H) ARM launch.

MAIN BODY - The principal ships of a formation (other than a convoy) being escorted by warships.

MAIN CONDENSATE - Condensate from the main condenser.

MAIN FEED - Feedwater being supplied to the boiler by the main feed pump of a main propulsion boiler.

MAIN STEAM - The major steam system, which operates at boiler pressure.

MAJOR LIGHTS - Have high intensity and visibility and indicate key navigational points.

MANEUVERING BOARD (Moboard) - Polar coordinate plotting sheet that solves relative motion problems.

MANEUVERING INTERVAL - The distance between line guides--it is the sum of the standard distances of the longest line plus 1,000 yards (500 yards if no large ship is present).

MANFRED - I am unable to operate (radar or emitter indicated) for reasons of national security.

MANNED HOSE - Manned hose is a single fire hose manned with a nozzleman and hosemen (as required).

MANUAL of ADVANCEMENT (BUPERSINST 1430.16 (Series)) - Provides procedures for administration of the advancement in rate system.

MANUAL for COURTS-MARTIAL, UNITED STATES (MCM) - Describes the types of courts?martial established by the Uniform Code of Military Justice (UCMJ) and details procedures to be followed in administering nonjudicial punishment (NJP).

MANUAL of JUDGE ADVOCATE GENERAL (JAGMAN- JAGINST 5800.7(Series)) - Contains supplemental regulations for court?martials and NJP for the Department of the Navy.

MANUAL BUS TRANSFER (MBT) - Device used to shift power source to semi-vital and non-vital ship equipment. Unlike the ABT, the MBT must be manually shifted to the other source of power.

MANY - Eight or more aircraft.

MARKER - 1. Submarine - fire a black, green or yellow smoke signal. 2. Aircraft - visually identify submarine. 3. A unit maintaining contact on a target from a position which gives it an immediate offensive capability.

MARK(ING) DIP - Helicopter come (coming) to hover and commence (commencing) sonar search.

MARK(ING) HOOVER - Helicopter come(ing) to hover.

MARK GATE - Helicopter is proper distance downwind from dip point. Commence(ing) automatic transition to hover.

MARKER TAPE - Buried within a strand and bears the manufacturer's name, type material, and year of manufacture.

MARLINE - Tarred, two-strand, left-laid hemp line called small stuff.

MARLINESPIKE - Tapered steel tool used to splice wire.

MARRIAGE - LST is connected to seaward end of pier.

MARRY - Assisting ship may attack in concert with attacking ship as opportunity offers.

MARSHAL - Enter holding at specific point.

MAPPING - Multi-function radar in an A/G mode.

MASK ONLY - A protective posture that provides personnel relief from wearing the complete chemical protective ensemble.

MASTER COMPARTMENT CHECK-OFF LIST (CCOL) - A master CCOL is developed for each ship at the time of its construction. CCOLs are provided in each compartment of the ship and provide information on all fittings within the compartment.

MATERIAL CONDITIONS OF READINESS - Refers to the degree of access and system closure in effect at any given time.

MATERIAL SAFETY DATA SHEET (MSDS) - A written or printed document about a hazardous material that is prepared and submitted by a manufacturer, product supplier, or distributor. Each MSDS contains the data elements required in 29 CFR 1910.1200.

MAXIMUM EFFECTIVE RANGE - Maximum distance at which weapons may fire accurately.

MAXIMUM GUN RANGE - Maximum distance projectiles will travel when fired at the optimum elevation angle.

MAXIMUM PERMISSIBLE EXPOSURE (MPE) - The total radiological exposure that the commanding officer will allow any individual to accumulate without command approval; personnel are rotated through vital stations near hot spots to prevent any individuals from exceeding this total.

MAYPOLE - Non-directional sonobuoy. May be supplemented by ACTIVE to denote active buoy or PASSIVE to denote passive buoy.

MEADOW - A predesignated area in which a submarine may operate during the implementation of GRASSHOPPER procedures.

MEAN SOLAR TIME - Based on a "mean sun" that moves westward around the celestial equator at a constant rate.

MEATBALL - Pilot has landing aid source light image.

MECHANICAL TIME FUSES (MTFs) - Nose fuses that detonates the projectile at a predetermined time.

MECHANICAL VENTILATION - Provides fresh air when needed, independent of the direction of the wind or temperature.

MEDICAL OFFICER - Determines the physical or psychological dependency of an individual using alcohol/drugs, and then identifies the appropriate method of treatment.

MEDITERRANEAN MOOR - Both anchors are dropped and the stern backed into the pier. A stern line and two quarter lines, crossed under the stern line, secure the stern.

MEDIUM (Maritime) - Between 5,000 feet and 25,000 feet. (Air) - Descriptive call indicating the target's altitude is between 5,000 feet AGL to 25,000 feet MSL.

MEDIUM PRESSURE - A pressure of 151 to 1000 psig.

MEGATON - Nuclear weapon yield equivalent to the explosive energy released by 1,000,000 tons of TNT.

MELD - Directive call to adjust radar scan volume to cover the same target group.

MELT - Informs helicopters that their movements are no longer restricted by FREEZE order.

MEMBRANE - The thin anisotropic polymer films that is the active separation mechanism in osmosis and reverse osmosis.

MERGED - Tracks have come together. 1. Call indicating radar returns/tracks have come together. 2. Information that friendlies and targets have arrived in the same visual arena.

MESSAGE IDENTIFICATION LINE (MSGID) - Identifies the message type and originator.

MESSAGE TEXT FORMAT (MTF) - A software program that allows a message drafter to format all Navy Messages and transmit them.

MESSENGER - Individual responsible to relay orders and information. These messages will normally be relayed between the scene, the repair locker, and, if in port, the quarterdeck.

MESSENGER - Attachment to the shot line that guides across more substantial lines such as the span wire and fuel rig.

METEOROLOGICAL VISIBILITY - Range that the unaided human eye can see an unlighted object by day.

METHODS of DAMAGE CONTROL TRAINING - There are many examples of effective training methods. One is lectures on various portable and installed damage control equipment. The lecture method of training discusses the basic parts, the functions of each part, and the operation of equipment with limiting parameters. Another method of training is hands-on training, sometimes called demonstration/performance; for example, having the trainee demonstrate the proper setup and operation of the P-100 fire-fighting pump.

MICKEY - Descriptive call referencing the Have Quick Time of the Day (TOD) signal.

MICROFICHE RECORD - A folder of sheets of small film containing photo copies of a service member's evaluations, picture, personal awards, and other matters of official purpose.

MIDCOURSE PHASE - Begins at the end of the boost phase and continues until target acquisition.

MIDDLEMAN - Communication relay which requires receipt and subsequent manual retransmission.

MIDGET - A very small submarine which has pressure hull and which accommodates a small crew.

MIDNIGHT - Informative C2 functions are no longer available (opposite of SUNRISE).

MIF - Multinational Interception Force formed to enforce sanctions.

MIKEDUFF - MFDF equipment or unit fitted with MFDF equipment.

MIMIC BUS - A mimic bus depicts the physical arrangement of switchboard and bus ties. The mimic bus is found on Electrical Plant control consoles onboard ships.

MINOR LIGHTS - Have low intensity and serve as navigational aids within harbors and channels to mark isolated dangers.

MISCELLANEOUS CIRCUITS - There are several miscellaneous circuits that provide for the transmission of information of direct interest to damage control stations.

MISFIT - Continue using daily changing call signs currently in use (or encrypted by means of key card identification) until further notice. (Promulgated simultaneously on all circuits affected and to be authenticated). Cancelled by CHARTER.

MISHAP - Any unexplained or unexpected event causing personnel injury, occupation illness, death, material loss or damage, or an explosion of any kind whether damage occurs or not.

MISSILE HAZARD - An object that could become dislodged by a sudden shock or ship motion and cause injury to personnel.

MISSION - The task, together with the purpose, that clearly indicates the action to be taken and the reason therefore. (Joint Pub 1-02).

MISSION TYPE ORDER - Order to a unit to perform a mission without specifying how it is to be accomplished. (Joint Pub l-02).

MISSING MOVEMENT - According to the UCMJ, "any person...who through neglect or design, misses the movement of a ship, aircraft, or unit with which he is required in the course of duty to move shall be punished as a court-martial shall direct."

MISSION ORIENTED PROTECTIVE POSTURE (MOPP) - Mission oriented protective posture (MOPP) is the level of CBR protection directed by a ship's commanding officer. Levels of protection range from 1 to 4, with 4 being fully protected.

MIX UP - Mixture of Friendly and Hostile aircraft.

MK 15 PHALANX CLOSE-IN WEAPON SYSTEM (CIWS) - A primary ship defense weapon, provides final defense against Anti-Ship Missiles (ASMs).

MK 36 SUPER RAPID BLOOM OFFBOARD COUNTERMEASURES (SRBOC) - A deck-mounted, mortar-type countermeasure system used to launch chaff against a variety of threats.

MK XII IFF - An IFF system, was designed to satisfy DOD requirements of improved air traffic control within the U.S.

MHHW - The average of the higher of the high water levels occurring during each tidal day over a nineteen-year period.

MHW - The average of all high tide water levels measured over a 19-year period.

MHWN - The lowest of all high water reference planes in common use; it is the average height of all neap tide high water levels.

MHWS - The highest of all high water reference planes, it is the average of all spring tide high water levels.

MLLW - The average of the lower of the low water levels occurring during each tidal day over a 19 year period.

MLW - The average of all low tide water levels measured over a 19 year period.

MLWN - The highest of all low water reference planes in common use, it is the average height of all neap tide low water levels.

MLWS - The lowest of all low water reference planes; it is the average of all spring tide low water levels.

MODE 1 - Used to identify the mission of the squawking unit.

MODE 2 - Used to identify a specific unit.

MODE 3/A - A four digit reply between 0000 and 7777; Used for airspace management and control.

MODE 4 - The only electronic means of positively identifying a unit as friendly.

MODE C - A four-digit reply between 000.0 and 126.0; Used to determine the altitude of an aircraft.

MODERATE STRAIN - Tattletale is under moderate tension to the point of just being taut.

MODIFIED - As specified by operation orders, instructions or signals.

MOMENTUM - The product of projectile mass and velocity.

MONITOR - Directive to maintain radar awareness on or assume responsibility for a specified group.

MONITORING - The continued or periodic act of seeking to determine whether chemical, biological, or radiological contamination is present.

MOOW - The Messenger of the Watch assists the Petty Officer of the Watch in carrying out the POD by escorting visitors, making wake-up calls and delivering messages and reports.

MORE HELP - Further target positional information is required.

MOTHER - Parent ship.

MOTION - Movement of an object from one point to another point.

MOUSING - Light line turned several times across a hook or opening to prevent a sling from slipping off or a pin from backing out.

MUD (DIRECTION and RANGE if ABLE) - Informative call of a RWR indication of a SAM/AAA radar lock on ("BLUE 2, MUD, right three o'clock, close").

MUGGER - A unit detailed to harass a MARKER from close quarters.

MULTIFREQUENCY LINK-11 - Capability allowing a single Link-11 network to operate on multiple frequencies improving Link connectivity.

MULTIGAS DETECTOR (DRAGER) - A single multi-purpose gas detector pump with calorimetric tubes used to detect over 100 toxic gases/vapors.

MULTIPLE - There are a number of stations on the same frequency.

MUSHROOM - Nuclear weapon detonation. May also be used with WARNING to denote enemy nuclear attack.

MUSHROOM ANCHOR - Has a bowl instead of flukes.

MUSIC - Electronic jamming.

MUSTANG - An ASUW weapon-carrying helicopter.

MUZZLE - End through which projectiles exit.

MYOSIS - Excessive contraction of the pupils of the eyes caused by exposure to minute quantities of nerve agents; the pupil is unable to dilate and remains contracted, and task performance is severely impaired or impossible, often accompanied by pain and a headache.

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NADAIR - The point on the opposite side of the sphere directly below the observer or geographical position.

NAILS - RWR indication of AI-radar in search. Add clock position/azimuth, if known.

NAKED - Informative call indicating no RWR indications on the RWR scope.

NANCY - Infrared equipment.

NARRATIVE (NARR) - Used to describe multiple references; gives brief description of each reference.

NATIONAL IMAGERY and MAPPING AGENCY (NIMA) - Creates all of the digital nautical charts required for safe navigation.

NATIONAL OCEANOGRAPHIC and ATMOSPHERIC ADMINISTRATION (NOAA) - Responsible for providing NIMA with the majority of information required to construct charts.

NATO BREAKABLE SPOOL - A quick-release coupling not equipped with a probe receiver; used when fueling NATO and MSC ships.

NATURAL ROPE - Plant-based fibers consisting of cotton, hemp, agave, jute, and manila.

NATURAL FIBER ROPE - Stowage is important; subject to deterioration from heat, sunlight, mildew rot, exposure to chemicals, paint, and oils that is hard to detect; best stowage is dry cool, dark, well ventilated area, far away from any source of chemicals or gaseous fumes.

NAUTICAL ALMANAC - Contains specific astronomical information needed by marine navigators, tabulated to the nearest 0.1' of an arc and 1 second of time.

NAUTICAL ALMANAC - A periodical publication of astronomical data designed primarily for marine navigation.

NAUTICAL MILE (NM) - A unit of distance equal to 2000 yards.

NAVIGATION SENSOR SYSTEM INTERFACE - Official electronic navigation system for the Navy; collects, processes, and integrates navigation data received from speed logs, anemometers, fathometers, gyros, flux gate magnetic compasses, and the GPS, and distributes it to weapon systems and combat support systems.

NAVIGATION TEAM - Compute tides and currents for the entire day and post graphs displaying this information conspicuously on the bridge and in CIC.

NAVIGATIONAL DRAFT - Depth to which a vessel is submerged from the waterline to the lowest hull projection.

NAVIGATIONAL TRIANGLE - The spherical triangle solved when computing altitude and azimuth and great circle sailing problems.

NAVIGABLE WATERS - The territorial sea and internal waters (rivers, lakes) of the U.S.

NAVIGATION MODE - An extension of the surface radar mode.

NAVAL SHIPS' TECHNICAL MANUAL (NSTM) - These manuals cover different aspects of damage control, which include the following: fire fighting, flooding, ship's stability, and CBR countermeasures. Study of the NSTMs will help you complete your damage control personnel qualification standards.

NAVY ENLISTED CLASSIFICATION (NEC) - Structure used to identify special knowledge and skill sets required to perform specific job roles. NEC codes help BUPERS and individual commands track manning levels of specially trained personnel.

NAVY and MARINE CORPS AWARDS MANUAL (SECNAVINST 1650.1 (Series)) - Promulgates information and regulations concerning current awards available to units and individuals in the naval service. Navy Core Values Certain bedrock principles that deal with three very important values to the Navy; Honor, Courage, and Commitment. Honor: "I will bear true faith and allegiance ..."

Accordingly, we will: Conduct ourselves in the highest ethical manner in all relationships with peers, superiors and subordinates; Be honest and truthful in our dealings with each other, and with those outside the Navy; Be willing to make honest recommendations and accept those of junior personnel; Encourage new ideas and deliver the bad news, even when it is unpopular; Abide by an uncompromising code of integrity, taking responsibility for our actions and keeping our word; Fulfill or exceed our legal and ethical responsibilities in our public and personal lives twenty-four hours a day. Illegal or improper behavior or even the appearance of such behavior will not be tolerated. We are accountable for our professional and personal behavior. We will be mindful of the privilege to serve our fellow Americans. Courage: "I will support and defend ..." Accordingly, we will have: courage to meet the demands of our profession and the mission when it is hazardous, demanding, or otherwise difficult; Make decisions in the best interest of the navy and the nation, without regard to personal consequences; Meet these challenges while adhering to a higher standard of personal conduct and decency; Be loyal to our nation, ensuring the resources entrusted to us are used in an honest, careful, and efficient way. Courage is the value that gives us the moral and mental strength to do what is right, even in the face of personal or professional adversity.

Commitment: "I will obey the orders ..." Accordingly, we will: Demand respect up and down the chain of command; Care for the safety, professional, personal and spiritual well-being of our people; Show respect toward all people without regard to race, religion, or gender; Treat each individual with human dignity; Be committed to positive change and constant improvement; Exhibit the highest degree of moral character, technical excellence, quality and competence in what we have been trained to do. The day-to-day duty of every Navy man and woman is to work together as a team to improve the quality of our work, our people and ourselves.

NAVAL MILITARY PERSONNEL MANUAL (MILPERSMAN 15560) - Sets forth instructions for the guidance of personnel in matters under the cognizance of BUPERS.

NAVY CORRESPONDENCE COURSES - Self-study media designed to provide instruction in naval subjects, primarily rating skills.

NAVY DRUG and ALCOHOL ABUSE PROGRAM (NADAP) - An eight-point policy statement supporting "zero tolerance" of drug use and alcohol abuse.

NAVY DRUG SCREENING PROGRAM (NDSP) - Training Four-hour training session that covers proper operation of the NDSP computer-based application used to administer Monthly random command drug testing.

NAVY OCCUPATIONAL SAFETY AND HEALTH (NAVOSH) STANDARDS - Occupational safety and health standards published by the Navy which include, are in addition to, or are alternatives for, the OSHA standards which prescribe conditions and methods necessary to provide a safe and healthful working environment.

NAVY REGULATIONS - The principle regulatory document of the Department of the Navy. It is endowed with the sanction of law, and contains the primary guidelines concerning duty, responsibility, authority, and relationships between various commands.

NAVY TACTICAL DATA SYSTEM - Automated combat direction system used to provide battle management support data acquired from air, sea, and land-based sensors to participating units.

NAVY TACTICAL COMMAND SYSTEM (Afloat) - Primary afloat C4I tactical information management system within the JMCIS architecture for receipt, processing, correlation, storage, and presentation of data from multiple sensors and sources.

NCS/GRU - NCS and GRU should be centrally located.

NEC MANUAL - Manual of Navy Enlisted Manpower and Personnel Classifications and Occupational Standards.

NEED-to-KNOW - The requirement to have access to classified information in order to perform designated duties.

NEGATIVE PRESSURE - A pressure less than atmospheric pressure. Gases and liquids flow from higher pressure to lower pressure areas; air is drawn into an area of negative pressure.

NEGATIVE TROUT - Transmitted to control when the racket to which a Duffer has been assigned is detected but bearing cannot be obtained.

NEAP-TIDE - When the positions of sun, earth and moon form aright angle, their gravitational forces are somewhat opposed. This causes moderate high tides at the poles and moderate low tides at the equator.

NERVE AGENTS - These agents radically disturb the chemical processes of the nervous system, which impairs or stops other bodily functions.

NET BALL - In AIR/SUB co-operation, a method to perform identification.

NET CONTROL STATION - Unit assigned as interrogating station for a data link network.

NET CYCLE - Process where pickets exchange data with all active participating units.

NET TIME REFERENCE - Time established as a network system time reference.

NEUTRAL - A track whose characteristics, behavior, origin or nationality indicate that it is neither supporting nor opposing friendly forces.

NEUTRALIZATION NUMBER - Is defined as the number of milligrams of potassium hydroxide (KOH) required to neutralize 1 gram of the oil. All petroleum products become acidic as deterioration is caused by exposure to air and heat. An increase in acidity indicates the level of the oil deterioration.

NEW PICTURE - Used by controller or aircrew when tactical picture has changed. Supersedes all previous calls and re-establishes picture for all players.

NIMA - Catalog of Charts and Publications Part 2, generally of most interest to mariners, is divided into ten chapters, one chapter that lists available charts for each of the world's nine regions, and Chapter X that lists publications.

NEUTRON - A subatomic particle that is electrically neutral.

NOCAN - Unable to comply (with your instructions).

NOCOP - Unable to communicate due to exercise or mission in progress.

NODE - Unit required to maintain communications within a data link.

NO FACTOR - Not a threat.

NOJOY - I have been unsuccessful or I have no information. Informative call indicating the aircrew does not have visual contact with the target/bandit/landmark.

NOMINAL RANGE - Maximum distance a light can be seen in clear weather (10 nm visibility).

NON-CONTRABAND INSPECTION - Inspection to determine and ensure that the command is properly equipped, functioning properly, and that the command is maintaining proper standards of readiness, Sea/air worthiness, sanitation and cleanliness.

NON-DESIGNATED STRIKERS - Personnel in paygrades E-1 through E-3 who have not been designated to enter a specific rating.

NON-FRIABLE - Material that when dry, cannot be crumbled, pulverized or reduced to powder by hand pressure. The asbestos fibers in these materials cannot be readily released into the air under normal work conditions.

NONPERSISTENT AGENT - A chemical agent that when released, dissipates or loses its ability to cause casualties after a few minutes.

NONSELF DESTRUCT FUSES - Does not detonate the projectile if designed or programmed fuzing parameters are not met.

NONSUB - Contact is classified non submarine.

NOTACK - Directive by/request to a friendly submarine to establish an area in which no air or surface launched ASW weapon may be employed.

NOTCH (direction) - Description of an aircraft maneuvering defensively to position the bandit on the aircraft's wing line ("WHITE 2, NOTCHING south").

NOTICES to MARINERS - Include corrections for National Imagery and Mapping Agency (NIMA) Charts and Publications, announce new editions, new products or cancelled products, and list worldwide NAVAREA and HYDROPAC/HYDROLANT radiobroadcast warnings; published weekly, and is backed up by electronic message traffic (Broadcast NM, HYDROLANT/PAC, NAVAREAS).

NOZZLEMAN - The nozzleman mans the attack hose nozzle so that the fire may be extinguished.

NUCLEAR BURSTS - An explosion resulting from a fission or fusion reaction.

NUN BUOYS - Conical shaped, unlit, primarily red.

NSWCPHD - Naval Surface Warfare Center Division, Port Hueneme Detachment, commonly referred to as "NEMESIS".

NTDS - The complex system of data inputs, consoles, converters, adapters, and radio terminals that provide information needed for rapid, accurate evaluations and decisions in combat situations.

NTDS/CDS - Software and hardware for non-Aegis ships used to integrate unit sensors, weapons, and intelligence sources for control of tactical operations.

NUCLEAR RADIATION - The four types of nuclear radiation released as the result of a nuclear explosion are alpha particles, beta particles, gamma rays, and neutrons.

NUCLEAR RADIATION INJURY - Unlike injuries from other weapon effects, nuclear ionizing radiation injuries may not become evident immediately unless a high enough dose is received. Nuclear radiation, even in very small doses, has some harmful effects on the body.

NUCLEUS - The central region of an atom, composed of protons and neutrons.

NWP CUSTODIAN - Responsible for the receipt, custody, accountability, and distribution of all Naval Warfare Publications.

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OBSERVATION POSITION - Initial formation position of a receiver joining a tanker which is echelon right for all receivers.

OBSTRUCTION LIGHTS - Installed at the highest points on the extreme port and starboard sides of the ship to outline the structure forward of the helicopter landing area.

___O'CLOCK___ - In clock code section and at range indicated (heading of own aircraft or unit being twelve o'clock).

OCCULTING (Occ) - Opposite of flashing; duration of light is always more than duration of darkness.

OCEAN CURRENTS - Large and stable movements of water that are mainly wind-driven.

OCTOPUS - Tactical data system computer.

OFF (direction) - Informative call indicating attack is terminated and maneuvering to the indicated direction.

OFF LOAD - Tanker fuel assigned for off-load to receiver(s) during a AAR mission.

OFF SET (direction) - Directive/descriptive call to maneuver in a specific direction ("BLACK is OFFSETTING north- WHITE is OFFSETTING south", or "WHITE OFFSET south - BLACK is OFFSETTING north").

OFFICER SUMMARY RECORD (OSR) - A summary of an officer's career performance and milestones that is reviewed by selections boards.

OFFICER TACTICAL COMMAND (OTC) - The senior line officer present or the officer to whom tactical command has been delegated.

OGIVE - Projectile's curved forward portion that provides a streamlined shape and smooth accurate flight.

OILFIELD - Informative call, indicating an activated MEZ (opposite of KOBOLD).

OLIVE DRAB - Gun ammunition items except training ammunition.

OILY WASTE - Oil mixed with water or other fluids such that the mixture is no longer useful.

OKAY - Equipment indicated is operative (cancels BENT).

ON-the-JOB TRAINING (OJT) - Training provided by means of close, daily association, supervisors will guide, tutor, and counsel their trainees, to encourage professional development within their group.

ON/OFF STATION - I have reached/left my assigned station.

ON the DECK - At minimum altitude.

ON-SCENE LEADER - The on-scene leader is the person in charge at the scene.

ON-STATION MONITORING - This information is used in determining when fallout ceases and in estimating accumulated doses at these locations.

ON TOP - I am over datum, target, object or position indicated.

OPAREA CHARTS - Are published for long-standing or high-interest Operational Areas.

OPENING - Increasing in range.

OPERATING PRESSURE - The constant pressure at which the boiler is being operated. Operating pressure is the same as either the steam drum or the superheater outlet pressure (depending of which is used as the controlling pressure). Operating pressure is specified in the manufacturer's technical manual.

OPERATIONAL BILLS - Periodic evolution bills. Some examples include those for cold weather, darken ship, heavy weather, special sea and anchor, and rescue and assistance.

OPERATIONAL CONTROL - Transferable command authority that may be exercised by commanders at any echelon at or below the level of combatant command. Operational control is inherent in Combatant Command (command authority) and is the authority to perform those functions of command over subordinate forces involving organizing and employing commands and forces, assigning tasks, designating objectives, and giving authoritative direction necessary to accomplish the mission. Also called OPCON. (Joint Pub l-02).

OPERATIONAL PROGRAM - Computer program of orders and instructions directing the computer to perform certain actions, process incoming data, and respond to operator actions.

OPERATIONAL REPORT (OPREP) - OPREP messages are special incident reports used to notify senior levels in the chain of command (e.g., President, Joint Chiefs of Staff, CNO, FLTCINCs) of an emergency situation that will most likely draw national or high navy interest.

OPERATIONAL SPEED - The highest speed at which a ship is required to proceed during a particular operation or during a stated period.

OPTASK FOTC - Provides guidance to plan, coordinate, and conduct force level functions required to develop C4I surveillance products.

OPTASK LINK - Fixed format message with sections for Link-4A, -11, and -16 providing link information to specified units.

OPTASK LINK (16) - Provides transmit time slot assignments, data forwarding assignment, track block assignments, setting, and network role assignments.

OPTASK SUW - Provides information on Surface Warfare coordination, supplements OPATSK LINK with additional guidance on Link-11 and Link-16 (JTIDS) operations, supplements OPTASK FOTC with guidance on use of JMCIS.

ORANGES SOUR/SWEET - Weather is unsuitable/suitable for aircraft mission.

ORBIT(ING) - Directive/descriptive call hold on current or indicated position.

ORDERED DISTANCE - The ordered distance between foremasts of adjacent ships in a line.

ORIGINATOR - Establishes message staffing and processing procedures-usually the CO.

ORM - Operational Risk Management; A proactive, definite approach for assessing and planning for risk in operations or activities through common processes based on risk versus benefit analysis established by the Naval Safety Center to be used Navy wide for mishap avoidance.

OSHA STANDARDS - Those standards issued by the Department of Labor's Occupational Safety and Health Administration pursuant to section 6 of the OSHA.

OSMOSIS - Self-diffusion through a semi-permeable membrane of a solvent due to the differential pressure between two solutions of differing concentrations. The natural tendency to equalize concentrations will result in a flow of solvent from the least concentrated solution to the more concentrated solution. The tendency is to dilute concentration.

OUT (direction) - Informative call indicating a turn to a cold aspect relative to a target/threat. Opposite of IN.

OUTHOUSE - My position in true bearing/miles from my reference point (assigned station).

OUTBOARD SHOT - Varies in length up to 14 fathoms; averages 6 1/2 fathoms.

OUTBOARD SWIVEL SHOT - (Bending shot) used to attach the anchor chain to the anchor.

OUTGOING FILE - Used to file all messages released by the command.

OUTHAUL LINE - Moves the trolley toward the receiving ship.

OUT-of-COMMISSION LABELS - An orange label used to identify instruments that are out of calibration and will not accurately indicate parameters.

OUT-of-COMMISSION LABELS - A red label used to identify instruments that will not correctly indicate parameters because they are defective, or isolated from the system. This label indicates that the instruments cannot be relied on and must be repaired and re-calibrated, or reconnected to the system, before use.

OUTSERTS - Clear plastic outserts that fit over the mask lens. They protect the lens from scratches when they are stored in the carrier, and they protect the lens from chemical agent droplets, oil, and other petroleum products when the mask is worn.

OVERHAUL - An examination and cleanup operation. It includes finding and extinguishing hidden fire and hot embers and determining whether the fire has extended to other parts of the ship.

OVER-the-HORIZON (Targeting) - Ability to track and engage targets beyond specific unit visual or electronic horizon using multiple platform sensors and NTCS (A) data management systems.

OXIDIZER - Any material that readily yields oxygen for combustion.

OXIDIZING MATERIAL - A chemical compound that spontaneously releases oxygen at normal temperature and air pressure or under slight heating.

OXYGEN - The content of the surrounding air. Ordinarily, a minimum concentration of 15% oxygen in the air is needed to support flaming combustion.

OXYGEN BREATHING APPARATUS (OBA) - An entirely self-contained breathing apparatus. It enables the wearer to breathe independently of the outside atmosphere. It produces its own oxygen from chemical reaction and allows the wearer to enter compartments, voids, or tanks that contain smoke, dust, or fire, or those that have a low oxygen content.

OXYGEN INDICATOR - Measures atmospheric concentrations of oxygen over a range of 0-25%. Typical application is to check for potential oxygen-deficient atmospheres during post fire operations.

OXYGEN-DEFICIENT ATMOSPHERE - Any oxygen concentration less than 19.5% at normal atmospheric pressure.

OXYGEN-ENRICHED ATMOSPHERE - Any oxygen concentration greater than 22% by volume at normal atmospheric pressure.

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PACKAGE - Geographically isolated collection of groups/contacts/formations.

PACMAN - Informative call that the fighters have found the end of the threat formation and are converting; given in range and bearing from the FAOR BULLSEYE ("BLUE 4 is PACMAN 290/5").

PADLOCKED - Informative call that the aircrew cannot take his eyes off another aircraft without losing tally or visual.

PAINT(S) - Interrogated group/radar contact that is responding with any of the specified IFF modes and correct codes established for the identification (ID) criteria.

PANCAKE - Land or I wish to land (reason may be specified, e.g. PANCAKE AMMO, PANCAKE FUEL).

PANTHER - Hostile nuclear submarine.

PARABOLIC DISH ANTENNA - Produces a beam that concentrates most energy in a small beam with a circular cross section.

PARALLEL CIRCUIT - Two or more electrical devices connected to the same pair of terminals so separate currents flow through each; electrons have more than one path to travel from the negative to the positive terminal.

PARALLAX - The angular difference in the vertical or horizontal planes between the point from which the target is observed and the location of the gun mounts.

PARALLEL PLANT - The condition in which two or more generators are operating supplying power to the entire electrical distribution system.

PARROT - A military IFF transponder.

PARROT INDIA - A military IFF interrogator.

PARTICIPATING UNIT - A unit that is part of a data link network.

PARTICULATE MATTER - Solid contamination appearing as dust, powder, grains, flakes, fiber, or stains, usually removable by settling, filtration, or centrifugal purification.

PASSED, NOT ADVANCED POINTS (PNA) - Credit points on later exams assigned to personnel who pass exams without being advanced due to the low number of vacancies in the rate.

PASSIVE HOMING - The target provides the energy source of on which the weapon guides or "homes".

PASSIVE SONOBUOY - Detects underwater sound, converts it to electrical energy, and transmits signal to receiving station Positive Control - Controlling unit responsible for all aircraft maneuvers.

PATCHING MATERIALS - Prefabricated wooden box patches in various sizes, rags, pillows, mattresses, blankets, kapok life jackets, metal plate, folding metal plate patches, flexible sheet metal patches, prefabricated steel box patches, bucket patches, and welded steel patches.

PATHOGENS - Living organisms that include bacteria, viruses, rickettsias, fungi, and protozoa.

PATROL - Patrol is vicinity of present position or position indicated or as previously ordered.

PELICAN - Long range patrol maritime aircraft capable of both search and attack.

PELICAN HOOK - Part of the stopper that actually secures the chain.

PENDANT RECEIVING STATION - Used for connecting stream cargo transfer rigs.

PENDING - Tracks which have not been subject to the identification process but are available for reporting.

PENTHOUSE - The range safety cell call sign established in the target towing ship and responsible for the safety conduct of all live/dummy attacks against a towed target during an exercise involving simulated attacks on the fleet, either by carrier or land-based aircraft.

PENETRATING - Used on armored/hard targets; and utilizes base detonating fuse; two types; common and armor piercing.

PENGUIN - Helicopter-launched anti-ship missile.

PENNANT - A pennant is a type of flag.

PERCUTANEOUS HAZARD - A chemical or biological agent that can harm the skin or enter the body through unbroken skin. Also called a skin hazard.

PERFORMANCE FACTOR - Score computed using the average of all the marks on all enlisted evaluations for current rate.

PERIOD - Time required for light to progress through one complete cycle.

PERIODIC TESTING - Testing conducted during the course of an operation at intervals greater than 15 minutes, based on the nature of the space, its contents, and the nature of the operation.

PERMEABLE - Having physical strength and appearing solid but capable of allowing certain materials to pass through virtually unimpeded.

PERMEABLE - Having pores or small openings that allow passage of some liquids or gases. For example, the material from which the chemical protective overgarment (CPO) is made is permeable to water vapor.

PERMISSIBLE EXPOSURE LIMIT (PEL) - The maximum permissible concentration of a toxic chemical or exposure level of a harmful physical agent to which personnel may be exposed. PEL is based on a time-weighted average (TWA) for a normal 8-hour day, 40-hour, 7-day week.

PERSONAL - Responsibility and Values: Education and Training (PREVENT)PEETE - Portable Electrical/Electronic Test Equipment A 24-hour facilitated command prevention course that deals with a variety of issues including alcohol and drug abuse, health and wellness, and personal responsibility for life-style choices.

PERSONNEL QUALIFICATION STANDARDS (PQS) - A program that provides the minimum level of knowledge and skills required of a trainee seeking qualification for a particular watchstation.

PHANTOM - A position or track derived from the triangulation of Spikes originating from Hostile jamming.

PHASE - Send a 1000 Hz modulation on both sidebands of HF radio frequency carrier for one minute beginning in(...)minutes, frequency locking and radio receiver tuning purposes. Particular light pattern or rhythm of changes within one complete cycle.

PHONE and DISTANCE LINES - Serve as the sound powered (s/p) phone circuit between ships' bridges; marked by colored flags spaced 20 feet apart; color sequence Green/Red/Yellow/Blue/White/Green; night equipped with red flashlights or red chemical lights at each flag; blue chemical lights paired at the 60-, 100-, 140-, and 180-foot markers.

PHONE TALKER - The phone talker mans the phone between the supervisor at their location and other stations and receives messages from other phone talkers and relays them to their supervisor.

PICKET - Unit capable of transmitting and receiving on a data link.

PICTURE - Request for/Informative to provide tactical situation status pertinent to mission. (picture clara north).

PIER MADE UP - Connecting of causeway section's end to end completed.

PIER SENTRY - Maintains security checkpoints on the pier by verifying the identification of personnel seeking entrance to the pier and inspecting vehicles and packages. PIGEONS - Bearing and distance to base (or specified destination) Bearing is to be suffixed. True or magnetic.

PILOTHOUSE - Enclosure on the bridge containing the steering controls.

PINCE/PINCER - Threat maneuvering for a bracket attack.

PING PONG - Exchange of link 11 information on datanet.

PINNACLE - An emission believed to originate from a platform assumed friendly.

PIRATE - Fast moving surface radar contact assumed to be a suspect fast patrol boat.

PITBULL - 1. Informative call that the AIM-120 is at MPRF active range. 2. AIM-54 at active range.

PITCH - Broad pulse repetition rate in thousands of units, e.g. 1.5 is equivalent to 1,500.

PITCH/PITCHBACK (LEFT/RIGHT) - Directive call for fighter or flight to execute a nose-high heading reversal.

PIT LOG - Marine instrument designed for direct measurement of speed through the water; incorporates a pitot tube extended through the ship's hull near the keel.

PIVOT SHIP - The lead ship that turns (pivots) to the new course when a column is wheeled.

PLAITED LINE - Fiber construction line that has eight strands, four each twisted left and right.

PLAN of INTENDED MOVEMENT - Track that the ship intends to follow; usually includes time the ship plans to arrive at predetermined points.

PLANE GUARD - Small combatant assigned to steam in wake of carrier conducting flight operations (Rescue Destroyer).

PLANNED POSITION INDICATOR (PPI) - Polar diagram with the transmitting ship's position at the center that provides a visual display of the bearing and ranges of radar targets from which echoes are received.

PLANNING BOARD for TRAINING (PBFT) - The principal organization through which the shipboard training program is formulated and implemented with the ultimate goal of producing well-trained and qualified personnel.

PLANT - Pattern of sonobuoys in Codar configuration.

PLATFORMS - Partial decks below the lowest complete deck used broken to admit machinery or other spaces and are called platform decks or just platforms.

PLAYBOY - Tactical air coordinator - Airborne.

PLAYMATE - Friendly ship, submarine or aircraft with which I am cooperating.

PLAYPEN - Submarine patrol area in a barrier.

PLAYTIME - Informative call indicating the amount of time an aircraft can remain in minutes before terminating present activity/RTB.

PLUGGING MATERIALS - Plugging materials include wooden plugs and wedges and wooden shoring.

PLUGMAN - The plugman connects the hose to the fireplug, and when directed to do so and while the nozzle is closed, open the fireplug valve to activate the hose.

PMS SKED - Computer program used by the Work Center Supervisor to create PMS scheduling documents, which the Division Officer uses to manage the preventive maintenance program of the division.

PNEUMATIC - Driven, or operated, by air pressure.

___POGO___ - Switch to communications channel number preceding POGO. If unable to establish communications, switch to channel number following POGO. If no channel number is following POGO return to this channel.

POINT of CONTACT (POC) - Identifies an individual to be contacted for information concerning content of the message.

POINTER - Directional sonobuoy. May be supplemented by Active to denote active buoy or Passive to denote passive.

POINTING___ - I hold directional sonobuoy or Codar bearing on contact___ degrees (it must be understood whether bearings are magnetic, true or relative to Codar plant road).

POINT DETONATING FUSES (PDFs) - Contact fuse that detonates upon striking the target.

POLAR - Friendly nuclear submarine.

POLAR BEAR (direction) - Friendly aircraft has visual/contact on the friendly package and is joining.

POLARITY - The condition in an electrical circuit by which the direction of the flow of current can be determined. Usually applied to batteries and other direct voltage sources. Two opposite charges, one positive and one negative. A quality of having two opposite magnetic poles, one north and the other south.

POND - Carry out jamming plan indicated or in accordance with previous orders.

PONY - ASW weapon carrying helicopter.

POPCORN - Hull popping noises indicating that a submarine is changing depth.

POPEYE - In clouds or area of reduced visibility.

POOP DECK - A partial deck above the main deck located all the way aft.

POP - 1. Starting climb for Air to Ground attack. 2. Directive for maximum performance climb out of low altitude structure.

POPUP - Informative call a contact that has suddenly appeared.

PORT DIRECTORIES - An Official Use Only publication covering regular ports of call.

PORT SERVICES - Services that are rendered when a ship is import (Steam, water, sewage, firemain, etc).

PORTABLE SUBMERSIBLE PUMPS - The portable submersible pump used aboard naval ships is a centrifugal pump driven by a water-jacketed constant speed ac electric motor and may be designed to operate as single or three phase at 120, 240, or 440 volts.

POSSIBLE COMPROMISE - A possible compromise is when classified information is not properly controlled.

POSITION QUALITY - Accuracy value of a unit's known geodetic and relative position.

POSITION and INTENDED MOVEMENT (PIM) - The theoretical position of the ship on the intended track at any time. The PIM moves along the track at the SOA, and the actual ship's position can be described in relation to it.

POSIT - Request for, or informative call describing friendly aircraft current position from a fixed reference point (i.e. CAP datum or BULLSEYE).

POSITIVE CONTROL - The controlling unit is responsible for taking actions for collision avoidance, such as ordering the necessary alterations to heading, speed and altitude to maintain separation criteria.

POSSUB (LOW/HIGH/CONFIDENCE) - Contact classified as possible submarine.

POST ATTACK - Directive transmission to indicate desired direction after completion of intercept/engagement.

POSTBOX - In AIR/SUB co-operation, a method used by submarine to rerouting message by communications relay.

POSTHOLE - Rapid descending spiral.

POST-SEPARATION (MATERNITY) CARE - Limited medical care benefits provided to pregnant service members after separation from the naval service.

POTENTIAL ENERGY - Energy at rest; stored energy.

POUNCER - A unit stationed to provide defense in depth and mutual support for the screening units.

POWER - Directive call to set the throttle(s) to an appropriate setting. In an A/A engagement, this may mean to reduce the throttles to idle to reduce the IR signature. Is defined as the rate of doing work or the rate of expending energy.

POWER FACTOR - The ratio of the actual power of an alternating or pulsating current, as measured by a wattmeter, to the apparent power, as indicated by ammeter and voltmeter readings. The power factor of an inductor, capacitor, or insulator is an expression of their losses.

POWER TRANSMISSION - Is the process of transmitting power from the driving unit (engine) to the driven unit (load).

POWER of ATTORNEY - A legal document authorizing and designating a person to act in behalf of someone in their absence.

POWERCHECK VALVE - Diaphragm type, normally closed, seawater pressure-operated control valve. This valve allows the flow of AFFF from the pump to be mixed with seawater and protects the AFFF tank from seawater contamination or dilution.

POWERTROL VALVE - Diaphragm type, normally closed, seawater pressure-operated control valve. This valve allows the flow of AFFF/seawater solution through the distribution system or controls seawater flow on flight deck injection systems.

PRECEPT - A document that gives general and specific guidance to the board regarding the criteria upon which their selections should be based.

PRECEDENCE - Speed of service for processing a message.

PRE-CONTACT POSITION - Stabilized position behind the AAR equipment, to be achieved before being cleared to contact position.

PREFERRED CHANNEL BUOYS - Mark junctions, bifurcation, or hazards that may be passed on either side with topmost color band denoting the preferred channel.

PRELIMINARY INQUIRY OFFICER - The officer assigned to collect all available facts about an offense itself and the background of the accused.

PRELIMINARY INQUIRY REPORT - The report completed by the Preliminary Inquiry Officer documenting all available facts about an offense itself and the background of the accused.

PRELUDE - The reference point from which track position are reported within a force.

PREP CHARLIE - Carrier(s) addressed land aircraft when ready (Relay to aircraft when ready).

PREPARATION for OVERSEAS MOVEMENT (POM) GUIDE (COMNAVSURFLANT INSTRUCTION 3500.3 (Series)/PACFLT CSTAR Memorandum) - Provides guidance on the preparation required prior to getting underway for a six month deployment.

PRESS - Directive call that a requested action is approved and will be supported.

PRESENCE - A condition where there are live rounds exposed directly to RF energy in the gun system linkless feed chutes and gun entrance and exit units.

PRESET and PROGRAMMED GUIDANCE SYSTEMS - Require that guidance information be input to the weapon prior to launch. The following screens will describe how this system functions.

PRESSURE LOCK - A shipboard passageway with a quick-acting watertight (QAWT) door on either end. Only one door is opened at a time to prevent the flow of air from a pressurized part of the ship to an unpressurized area. Unlike an air lock, a pressure lock does not have air sweep fittings for purging contaminated air. Therefore, it is not used in a contaminated environment.

PRE-BOARDING INSTRUCTION - Specific instructions are radioed to the merchant ship prior to boarding; information includes boarding time, where to rig ladder, unlock all secured spaces, ventilate holds, muster crew in view.

PRE-COMBUSTION - The stage that involves a partial burning of the fuel before it enters the main combustion space. Pre-combustion helps to create the turbulence needed for the fuel and air to be properly mixed.

PRE-TRANSMITTAL REVIEW - In MDS, the Division Officer (DIVO) conducts a review of each maintenance item prior to its approval. This allows the DIVO to review the maintenance action for accuracy, ensure the material needed to complete the action is on order, and verify all required information and associated forms have been completed.

PRE-WETTING - Activation of the Countermeasure Washdown System before the arrival of chemical and biological contamination.

PRESSURE - The amount of force distributed over each unit of area, usually expressed in pounds per square inch (psi).

PRIMARY CIRCUITS - The number of primary circuits used within the sound-powered battle telephone system varies among ships. The size and type of your ship normally determines the choice of circuits.

PRIMARY LIGHTS - Very strong, long range lights used for making landfall or navigating through coastal passages.

PRIME MOVER - The source of the turning force applied to the rotor of a generator. This may be an electric motor, a gasoline engine, steam turbine, etc. The prime mover is the source of mechanical power used to drive the propulsion shaft. Propulsion prime movers used onboard ships are steam turbines, diesel engines and gas turbine engines.

PRIMING - A method used to remove air in fuel system for the prevention of stalls, misfires, or knocking.

PRINT (BANDIT/FRIENDLY) - Valid non co-operative target recognition (NCTR) reply.

PRIORITY (P) - Highest precedence assigned to administrative matters; typically used for administrative and logistical message traffic of a sensitive nature or of increased urgency; also used for information essential to operations currently in progress; speed of service objective 3 hours.

PRIVATEER - Hostile missile-firing Fast Patrol Boat.

PROBE - A fueling probe on the hose and a receiver bell. Any aircraft which carries out the visual identification/recognition of a specific target which has previously been located by another means.

PROBABLE CAUSE - A reasonable belief that a crime has been committed and evidence related to that crime will be located in the place to be searched at that time.

PROBSUB - Contact classified as probable submarine.

PROGRAMED OPERATIONAL and FUNCTIONAL APPRAISALS (POFA) - Used to trouble shoot problems in the TDS.

PROJECTILE SEATING DISTANCE GAUGE (PSDG) - Determines the depth of penetration of the gauge through the chamber and into the gun bore.

PRONTO - As quickly as possible.

PROPELLER - Rotating screw-like device that provides thrust to push the ship through the water.

PROPULSION FAILURE - Course corrections from the guidance system will continue to be fed to the control system; however, the weapon is not able to maintain its altitude and the corrected flight path.

PROPULSION SECTION - Delivers the warhead to the intended target.

PROTECTION FACTOR - The reciprocal of a transmission (or shielding) factor. A radiation measurement at an interior location can be multiplied by the protection factor for that space to estimate the radiation level at the corresponding exterior location. A protection factor is always greater than one. Multiplying by a protection factor is mathematically equivalent to dividing by a transmission factor.

PROTECTIVE MASK - A primary means of defense against CB agents is the protective mask. The mask is designed to protect the face, eyes, and the respiratory tract of the user from tactical concentrations of chemical and biological agents, toxins, and radioactive fallout particles.

PROTECTIVE SHIELDING - A method of defense against nuclear radiation.

PROTON - A subatomic particle that has a positive electrical charge.

PROTRACTED EXPOSURE - Those in which doses are received over a longer period of time, normally greater than 24 hours, as a result of exposure to fallout.

PROXIMITY FUSES - Detonates when the weapon reaches an optimal position relative to the target.

PSEUDO-EQUIVALENT ROUND (PESR) - A method of estimating bore erosion based on the number and type of propelling charges fired since the last star gauge measurement.

PUMP - Directive/descriptive call indicating the fighters are maneuvering up to 180° degrees away from the threat with the intention of recommitting, depending on the tactical situation.

PUMPKIN - In AIR/SUB co-operation, an ESM homing method. (Aircraft as transmitting unit).

PUPPIES - Emission control plan (EMCON plan) is modified as follows ___.

PURE - Informative indicating pure pursuit is being used or directive to go pure pursuit.

PURPLE - Unit indicated is suspected of carrying nuclear weapons.

PURGING - The method by which gases, vapors, or other airborne impurities are displaced from a confined space.

PURPLE-K-POWDER (PKP) - Potassium bicarbonate powder used to extinguish class BRAVO and class CHARLIE fires.

PUSH (FREQ/CHANNEL/TAD) - Directive call to switch to designated frequency, channel or TAD.

PUSHING - Departing designated point.

PUSHING (GROUP/DESCRIPTION) - Informative that said group(s) have turned cold and will continue to be monitored.

PYRAMID - Any ship-launched torpedo weapon system. May be prefixed with torpedo brevity word (BASSET, COBRA, etc.).

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QUALIFIED PERSON - A person designated, in writing, as capable (by education or specialized training) of anticipating, recognizing, and evaluating personnel exposure to hazardous substances or other unsafe conditions in a confined space. This person shall be capable of specifying necessary control or protective action to ensure personnel safety.

QUARTZ CHRONOMETERS - Provides the Navigator with precise time, set to Greenwich Mean Time and can be reset if necessary.

QUARTZ WATCHES - Used for timing navigation lights and during celestial observations.

QUICK FLASHING (QF) - Duration of light is less than duration of darkness, the frequency is at least 60 times per minute.

QUARTER DECK - AN are of the ship designated by the Commanding Officer where official and ceremonial functions are carried out when the ship is in port or at anchor.

QUARTERDECK WATCH - First line of defense that is manned 24 hours a day in-port with a 9mm. pistol.

QUARTERLY PMS SCHEDULE - A visual display of each work center's PMS requirements to be performed during a specific three month period.

QUERY DISSEMINATION - Information gathered during the query is forwarded to the commander of the MIF task group; warship is assigned to board vessel; all MIF units should copy information passed to MIF commander.

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RACKET - Intercepted electronic emission which has been assigned to a number of the track block.

RAD - A unit of energy absorbed from ionizing radiation absorbed from ionizing radiation, equal to 100 ergs per gram of irradiated material. An added factor in the use of a rad is that it expresses the dose from any type of radiation, whereas the roentgen relates only to gamma radiation or X rays.

RADAR - Determines the present position of the target in bearing, range and elevation. Determines distance and direction by emitting radio energy and detecting returned reflections. A radar detects contacts by transmitting electro-magnetic pulses that bounce off dense objects and return to the antenna. Examples of radars found onboard a ship are surface search, air search and fire control.

RADAR ARRAY - Simulates the appearance of the ship, reflecting radar signals back towards their source.

RADAR BEARING - The true or relative bearing displayed from the radar transmitter to a known radar target.

RADAR CONSOLES - Present target video and enable system operators to control various radar functions.

RADAR OVERLAY MATCHING - Correlates the ship's navigation radar and electronic chart to display the most accurate ship's position available.

RADAR RANGE - The distance from the radar transmitter to a known radar target.

RADAR SYSTEMS - Multi-frequency, adjustable scanning speed, signal processing to reduce background clutter, submarines ECM can detect radar transmissions, threat of radar detection may keep submarine submerged.

RADAR SYSTEMS ELECTRONICS - Measures the interval between transmission of a pulse and receipt of a returned echo and generate a return image that appears on the radar scope.

RADAR-WEAPON ASSEMBLY - The search and track radar, gun subsystem, mount, barbette, and platform.

RADIAC - The acronym for Radiation, Detection, Indication, and Computation.

RADIANT HEAT - Transfer of heat in the form of waves similar to light and radio waves, without physical contact between the emitting and the receiving regions.

RADIO BROADCAST WARNINGS - Promulgate information of an immediate or emergency nature, including, but not limited to, warnings relating to defective aids to navigation and distress calls.

RADIO NAVIGATIONAL AIDS (Pub. 117) - Contains information on marine direction-finder stations, radio beacons, shore-based navigational systems, Racons, time signals, radio navigational warning schedules, and other radio navigational information.

RADIO SILENCE - Authorized to receive data but not transmit.

RADIOTELEPHONE - Quick, easy method of voice communication between units, circuit encryption used for secure communications.

RADIATION - Transfer of heat from a source across an intervening space, no material substance is involved.

RADIATION SICKNESS - The disease resulting from excessive exposure of the body to ionizing radiation.

RADIOACTIVE CLOUD - A cloud formed from the material that was vaporized in the fireball.

RADIOACTIVE DECAY - A decrease in the level of radioactivity from a radioisotope as it decomposes to a more stable condition.

RADIOACTIVE WATER POOL - A surface or underwater nuclear detonation creates a radioactive water pool in the area of the detonation. This pool expands outward rapidly from SZ, for about 2 minutes, and continues to expand more slowly.

RADIOACTIVITY - The release of nuclear radiation from a nuclear reaction or nuclear decay.

RADIOLOGICAL ASSESSMENT - Prediction of radiation intensity based on the decay of radioactive substances.

RADIOLOGICAL CONTROL - Minimizing the exposure to nuclear radiation and radioactive contamination.

RADIOLOGICAL DELINEATION - Determination of the location of radioactive contamination and the radioactive intensity of the radiation in the surrounding area.

RAINOUT - Radioactive rain that results when the cloud from a nuclear burst joins a rain cloud.

RAMROD - Offensive fighter sweep against HOSTILES.

RAM TENSIONER - A device that keeps the highline taut by adjusting the tension in the highline to compensate for normal ship movement during RAS.

RANGE - The range to an object or target in hundreds of yards Normally limited to less than 10,000 yards.

RANGE LIGHTS - Used to assist navigators in keeping their ships in the middle of channels, to establish lines of position (LOP's), and to determine gyro errors.

RANGE METHOD - Compare the observed gyro bearing of a navigation range of opportunity to the bearing indicated on the chart.

RANGE of TIDE - Difference between high and low water, the average Daily range of tides is referred to as mean range.

RANGER - An active non-directional sonobuoy giving target range.

RAPID EXTERNAL SURVEY - Sometimes referred to as the gross external survey, is conducted after the rapid internal survey to obtain more precise radiation levels at topside vital stations and at contaminated areas that are irradiating internal vital stations. As in the rapid internal survey, the focus is on getting an accurate measurement quickly at action stations and expeditiously reporting the results.

RAPID INTERNAL SURVEY - Performed immediately after the cessation of fallout to get an indication of the severity of the radiation hazard at specific locations, primarily action stations. Safe stay times for interior vital stations can be calculated based on the rapid internal survey.

RAPID-FIRE GUNS - Guns in which loading, firing, ejecting empty cases, and breech operations are performed automatically, but are powered by energy other than propellant energy.

RASTER CHARTS - Created by scanning an existing paper chart; similar to paper charts with the ability to run on most computers; low cost and ease of production; world-wide availability.

RAT - Hostile fighter.

RAT GUARDS - Shields secured around lines immediately after mooring to prevent rats from coming aboard.

RAT-TAILED STOPPER - Takes working strain of a working line while the working line is shifted.

RATFINK - Hostile bomber.

RATE - The combination of rating (occupational field) and paygrade.

RATING - A Navy occupation, or broad career field, which organizes occupational specialties together by related knowledge, training, aptitudes, and skills.

RATING ENTRY for GENERAL APPRENTICES (REGA)/CAREER REENLISTMENT OBJECTIVES (CREO) PROGRAM - Guides non-designated strikers into ratings with lower-level vacancies, and guides first-termers transitioning into the career force into undermanned ratings.

RAVEN - Airborne ECM operator.

RAYGUN (POSITION/HEADING/ALTITUDE) - 1. Indicates a radar lock-on to unknown aircraft that is presumed to be a threat. 2. A request for a Buddy Spike reply from friendly aircraft meeting these parameters.

REACTIVE MATERIAL - A solid, liquid, or gas that is chemically unstable at normal temperature and air pressure; capable of undergoing violent change when subjected to heat, shock, mixture with water, or other chemicals.

REACTIVE POWER - The power returned to the source by the reactive elements of the circuit is called reactive power. It is measured in volt-amperes reactive (var).

READINESS - A two digit group denoting time (in minutes) required to get airborne.

READY - The alert state READY orders the immediate readiness of the indicated Force Weapon System.

READY CAP - Fighter aircraft in condition of STANDBY.

READY SHELTER - If the ship is warned enough in advance, personnel topside shall be ordered to ready shelter before the arrival of the base surge or fallout. Taking ready shelter is both a contamination avoidance measure and a radiation mitigation technique.

REASONABLE BELIEF - Belief that a crime has been committed from which the evidence suggests.

RECEIPT - The way that classified information is sent.

RECEIVER - A swivel fitting that supports the probe on the receiving ship.

RECEIVING SHIP - Normally the approach ship.

RECCO - Aircraft search units.

RECKON___ - The contact is in a fade area. Its dead reckoning position is_____ (bearing)____(range).

RECOGNITION - Accomplished by the use of a decoder unit that receives the coded reply from the transponder via the receiver in the interrogator.

RECOIL SYSTEM - Absorbs the gun's rear thrust when firing.

RECIPROCAL BEARING - A bearing that is located exactly 180° out from another bearing.

REDUCED CHARGE - Used for defilade (reverse slope) fire missions when a higher trajectory is required; uses normal sized cartridge cases with less than a full service load of propellant.

REDEYE - In AIR/SUB co-operation, a visual homing method.

REDHEAD - Pulsating red light.

RED ZONE - Navy term for behaviors that are clearly sexual harassment. The most severe forms of sexual harassment constitute criminal conduct, such as sexual assault.

RED BUOYS - Mark channels' starboard sides or indicate obstructions which must be passed on your starboardside (IALA B).

REFERENCE (direction) - Directive to assume stated heading.

REGISTER of COMMISSIONED and WARRANT OFFICERS of the U.S. NAVY on ACTIVE DUTY (NAVPERS 15018A) - Lists the order of seniority of officers of the U.S.N. on active duty.

REFRACTOMETER - Gives accurate readings of total dissolved solids in aqueous solutions.

REFERENCE - Various documents, messages, phone conversations, or other means of disseminating information later referred to in the body of the message at hand.

REFERENCE STATION - The actual times of occurrence and level of high and low tide is listed for every day of the year.

REFRIGERENT - The vapor/liquid selected for use in refrigeration equipment.

REFRIGERENT TON - The refrigeration ton is the standard unit of measure used to designate the heat removal capacity of a refrigeration unit. One refrigerent ton removes 12,000 BTUs per hour, the same as a mid-sized portable room A/C unit.

RELATIVE BEARING - A bearing measured in degrees from the ship's heading clockwise to the line of sight of the observed object.

RELATIVE MOVEMENT - Motion measured with respect to an arbitrarily selected object, which may or may not have actual movement.

RELATIVE NAVIGATION - Automatic JTIDS function used to determine distance between units by measuring transmission arrival times and correlating them with reported positions.

RELATIVE PLOT - Polar coordinate presentation of the successive positions of one or more moving ships or objects with respect to another arbitrarily selected object which is used as the reference for motion.

RELATIVE WIND - Velocity and relative direction FROM which the wind is blowing in relation to ship's head.

RELEASER - Authorized by the CO to release or send out messages in the name of the command or activity.

RELAY LANTERNS - Installed throughout the ship to provide limited illumination when other sources fail.

RELEASE FROM ACTIVE DUTY - termination of active duty status and transfer to the Inactive Duty Naval Reserve or Fleet Reserve.

REMOTE CONTROL - When guns are controlled through remote signals from the gun fire control system.

REMOTE MANUAL OPERATION - Human operation of a process by manual manipulation of loading signals to the final control elements.

REMOTE OPTICAL SIGHT SYSTEM - Topside TV camera mounted on the director; used for remote manual tracking of a target or automatic following of the targets being tracked by another sensor.

REMRO - Remote Radar Operator, detects, tracks, and reports all radar contacts obtained from airborne radar.

RENO - Indicates that more than one radar contact is observed and the pilot is able to distinguish his assigned target.

RENT - Report of characteristics of an intercepted signal.

REPAIR ACTIVITY REPRESENTATIVE - The individual authorized to concur in the accuracy and adequacy of proposed tag-outs by signing the TORS.

REPAIR PARTIES - Qualified shipboard personnel responsible for executing damage control duties in a training or actual damage control situation.

REPAIR PARTS PETTY OFFICER (RPPO) - Responsible for the ordering of repair parts required for division equipment maintenance.

REPAIR PARTY MANUAL - The repair party manual provides detailed information on the standard methods and techniques used in damage control as outlined in NWP 3-20.31.

REPLY - Accomplished by the use of a transponder unit that receives interrogation signals and automatically replies with a coded response signal that provides identification.

REPORT(-) - Report contact designated frequently (every___minutes).

REPORT and DISPOSITION of OFFENSE(s) - NAVPERS 1626/7, also referred to as a report chit. A standard report used to formally place a person on report It is used to start a charge by letting the proper authority know about the apparent misconduct of a member.

RESCUE AND ASSISTANCE BILL - The Rescue and Assistance Bill organizes qualified personnel by duty section or the entire ship to render emergency assistance outside the ship.

RESCAP - Rescue Combat Air Patrol. Provides protection to rescue vehicles from hostile forces during all phases of SAR.

RESET - A call to re-establish to a pre-briefed position or area of operation. For HVAA, normally used following a RETROGADE, for fighters normally after an intercept.

RESIDUAL RADIATION - Nuclear radiation released after a nuclear explosion from fission products in fallout, rainout, base surge, and radioactive pool.

RESOLUTION 665 - Authorized UN forces to visit any vessel heading to or from Iraq.

RESOLUTION 686 - Trade restored with Kuwait after Iraqi defeat.

RESOLUTION 687 - Limited trade reestablished with Iraq for humanitarian and medical supplies; any trade requires prior approval of UN.

RESOLUTION 706 - Allowed Iraq to export oil to finance humanitarian aid.

RESOLUTION 712 - Allowed Iraq to export oil to finance humanitarian aid.

RESUME - Resume last formation/station/mission ordered.

RESUMED - Emission resumed and is identified as previous intercept.

RETESTING AND RECERTIFYING - The process of testing, evaluating, and certifying a confined space by the gas free engineer using the same procedures required for initial testing and certification when the certificate expires without entry, work, or test and updating of the certificate; or when conditions occur which alter the initial conditions found or specified.

RETROGRADE - Directive to withdraw from present position or area of operation in response to a threat.

RETURNING - Informative call indicating the fighters are returning to CAP given in bearing and range.

REVERSE OSMOSIS - The reverse of the natural osmosis achieved by external application of sufficient reverse pressure to cause the solvent to flow in its unnatural direction, that is from the more concentrated solution to the diluted solution.

REVERSE POWER RELAY - Device used to protect the prime mover by preventing it from becoming motorized (driven by another generator) when operating in parallel with another generator.

REVERT - Resume search on the previously assigned intercept guard (watch).

REVTAC - Type of vectored attack used when the directive unit broadcasts sonar contact information. The delivery unit solves his firing solution, using own radar for plotting or reported data.

RF - The Reserve Force is the remainder of duty section personnel that are not members of the SAT, BAF or fire party.

RHEOSTAT - A resistor whose value can be varied. A variable resistor, which is used for the purpose of adjusting the current in a circuit.

RHINO - A friendly aircraft with a nuclear weapon on board (RHINO may be used as a suffix to an aircraft's call sign to indicate which aircraft have NDB's on board).

RHUMB LINE - A line making the same oblique angle with all meridians.

RICKETTSIAE - Intracellular, parasitic microorganisms that are intermediate in size between bacteria and viruses.

RIDER - A bogey that is complying with ACO/safe passage procedures.

RIDING LINES - Used to hold the probe in place.

RIDING STOPPER - Mounted closest to the wildcat behind the housing stopper.


RIG CAPTAIN - The Senior Boatswain's Mate in charge of the station.

RIGGERS - Deck seamen who work for the rig captain.

RIM CONTACT - A contact which strikes the rim or periphery of the drogue.

RINGER - Shipborne short or medium range ASW projectile.

RIPPLE - Two or more munitions released or fired in close succession.

RISER - A radar contact which has suddenly appeared.

ROAD - Axis of sonobuoy pattern.

ROBB COUPLING - Combined quick-release coupling and valve consisting of a male end attached to the fueling manifold on the receiving ship and a female end secured to the hose'send, sent over by the delivery ship.

ROCKIES - In AIR/SUB co-operation, the aircraft approaches the contact area with homing assistance from the cooperating submarine.

ROENTGEN (R) - A unit of exposure to gamma or X radiation.

ROLL CALL - Poll of participating units by the NCS.

ROLLER CHOCK - Contains rollers to reduce line friction.

ROLLER PATH - A series of roller bearings, of each gun mount should be perfectly parallel to that of the reference director.

ROLLER PATHS - Bearings located on the stand upon which the gun mount rotates.

ROLLING FRICTION - Occurs when the surface of a curved body, such as a cylinder or sphere, rolls across another surface.

ROLLOVER - A sudden spread of flame through the unburnt gases and vapors in the upper layer across the overhead of a space.

ROLEX - Informative/directive call indicating a time change in minutes from a given datum. The term "plus" will indicate later time and the term "minus" will indicate an earlier time ("Mission 4TK148, Rolex plus 2" means two minutes have been added to the datum times).

RM VECTOR - Direction of relative motion and speed of relative motion.

ROMAN CANDLE - A nuclear missile is about to be exploded in the area indicated.

ROMPER - Any ship which is unable to remain with the convoy and has moved more than 10 miles ahead of the convoy.

RONSON - The unit addressed is to carry out an individual Gridlock with the GRU (or the PU as indicated within parenthesis).

ROPE - Illumination of an aircraft with an IR pointer.

ROTATING BAND - Circular band that seals the forward end of the gun chamber; engages the rifling; imparts projectile spin; acts as a rear bearing surface for the projectile.

ROUND TURN - A complete turn around an object, usually a bitt.

ROUTE - Bellhop channel indicated or AEW channel in use.

ROUTINE (R) - Typically used for administrative and logistical message traffic; also used for peacetime military operations; speed of service objective is 6 hours.

ROVING PATROL - Checks security of all sensitive areas on board (e.g., Radio Central, CMS safe, Ship's Office).

RPPO LOG - The Repair Parts Petty Officer (RPPO) Log is an automated function of the MDS system. It is a printed report that breaks down the material requirements for all maintenance actions placed on the CSMP.

RSS - Ready Service Spares, Spare parts used when critical components break down .

RUMBA - Own ship maneuvering for ranging.

RUNNING FIX - A position determined by crossing lines of position obtained at different times and advanced or retired to a common time.

RUNNING FIX - Position determined by crossing lines of position obtained at different times and advanced or retired to a common time.

RV - Informative/descriptive call indicating a rendezvous point.

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S-3 VIKING - ASW and ASUW roles, surface surveillance and intelligence collection, EW, mine warfare, SAR coordination, tanking, equipped with JTIDS Link-16.

SADDLED - Informative from wingman/element indicating the return to briefed formation position.

SADDLE WHIP - The retrieving line that is 1/2 inch or 3/4 inch wire 450- 800 feet long for fuel STREAM and span wire rigs.

____SAFE - Do not open fire/cease firing. Fire may be opened only in self-defense or in response to a formal order. Weapon control status; prefixed by the appropriate weapon code word or general term WEAPON.

SAFE/HOT - Select armament (safe/hot) or armament is safe/hot.

SAFE STAY TIME - The time personnel can remain in the vicinity of a radioactive hot spot without exceeding their maximum permissible exposure (MPE).

SAFE WATER MARK - Used to mark fairways and mid channels; red with white vertical stripes and red ball topmark.

SAFE WORKING LOAD (SWL) - The force required to stretch a line to the point where further strain may cause the line to fail, resulting in injury or death.

SAFETY - Safety is a primary concern during all training events. If an unsafe condition exists, the training event should be STOPPED until a safe condition is established. During training, planning, and operations, the operational risk management (ORM) process must be used. The training team leaders are responsible for ensuring that proper procedures are used in planning training events.

SAFETY COUNCIL - Analyzes the ship's safety program and makes policy recommendations on a Quarterly basis.

SAFETY LINK - Holds the gun in battery if counter-recoil system fails.

SAFETY OFFICER - The Officer in Charge (OIC) of a specified RAS/FAS transfer station.

SAILING CHARTS - Use scales 1:600,000 and smaller and are used for voyage planning and transit sailing.

SAILING DIRECTIONS and COAST PILOTS - Provides narrative descriptions of coastlines, harbors, winds, typical weather patterns, tides, currents, off-lying dangers, and other information not readily shown on a chart.

SALINITY - The concentration of chemical salts in water. Salinity increases the ability of water to conduct electrical current. This conductivity is measured by electrical devices, called salinity cells; salinity is indicated in units of epm (equivalent per million), ppm (parts per million), or micromhos/cm.

SALVO - Am about to open fire. FRIENDLY unit(s) keep clear or get clear of indicated contact, HOSTILE or area (Direction of withdrawal may be indicated).

SALVO ALARM - Sounded to warn gun crew of intention to shoot when mount is in remote control.

SALVO LATCH - Locks breechblock closed to prevent double loading in case of misfire.

SAM (direction) - Informative call indicating visual acquisition of a SAM or SAM launch (BLUE 3, SAM, right 4 o'clock).

SAME - Informative reply indicating that the aircrew has the identical information as was just stated.

SANDWICHED - A situation where an aircraft or element finds themselves between opposing aircraft or elements.

SAT - The Security Alert Team is the primary team that reacts to security alerts.

SATURATED STEAM - Steam saturated with all the heat it can hold at the boiling temperature of water.

SATURATION - A state of maximum impregnation.

SAUNTER - Fly at best endurance speed.

SCINTILLATION - The distortion of a very high-frequency electromagnetic signal as it passes through layers of beta particles from a nuclear explosion at altitudes above 35 miles.

SCHOOLS - Shore-based, formal training courses.

SCAN - Search sector indicated and report any contacts.

SCRAM___ - Friendly unit is in immediate danger. Withdraw clear in the direction indicated for safety. Directive call to cease the intercept and take immediate evasive action. Implies that the target aircraft is being engaged by SAMs or other AD fighters.

SCRAMBLE - Take off as quickly as possible. (Usually followed by the appropriate instructions).

SCRAPPER - Attack or localization aircraft of ASW air search and attack team.

SCREEN AXIS - An arbitrarily selected direction from which all bearings are used in the designation of screen stations in a circular formation are measured-the screen axis is always indicated as a true direction from the screen center.

SCREENING MAST - Another name for the Executive Officer's Inquiry (XOI); As it relates to processing disciplinary violations, during screening mast, the XO will either dismiss the report chit or forward it to the CO for captain's mast.

SCUD - Any threat TBM.

SEADOG(s) - Friendly Fast Patrol Boat(s).

SEA LION - Underwater interrogation equipment.

SEA PRINT(ER) - Underwater teletype transmission/equipment.

SEA RETURN___ - Sea return obscures sonar or radar display to distance indicated.

SEA SPARROW - Highly maneuverable air-to-air missile with surface-to-air capability.

SEA TALK - Underwater voice transmission.

SEARCH AND TRACK RADAR - A pulse doppler radar with separate search and track antennas, a common transmitter, a microwave receiver, and a signal processor.

SEARCHER - Unit having intercept equipment without DF capability. All references to duffers are applicable to searchers within their capabilities.

SEARCHLIGHT - Train antenna specified on true bearing indicated.

SECONDARY HAZARD - A chemical or biological hazard that does not develop during the delivery of the agent on target, but develops later.

SECONDARY LIGHTS - Short range lights found at harbor and river entrances.

SECONDARY STATIONS - Corrections to be applied to times and heights at the reference station to determine times and heights of tides.

SECRET - Classification to provide substantial degree of protection.

SECRET FILE - Used to file SECRET messages, some of which are received off of the fleet broadcast while others are received via different circuits.

SECTION LEADER - The Section Leader is responsible for writing the watchbill and ensuring that all duty section personnel are present. Reports to the CDO.

SECTOR LIGHTS - Used to warn navigators of hazards when approaching from certain dangerous arcs or sectors.

SECURING MATERIALS - Includes assorted hook bolts, manila line, wire rope, chain, machine bolts, angle clips for welding, and shoring. Backup materials include mess tables, metal joiner doors, buckets, plywood or lumber, sheet metal, and metal plate.

SECURITY ALERT FORCES - These teams (e.g., SAT, BAF, RF, and AF) respond to breeches or attempted breeches in shipboard security.

SECURITY CONTAINERS (SAFES) - Containers used to safeguard classified material.

SECURITY MANAGER - Serves as the principal advisor and representative to the commanding officer in matters pertaining to the classification, safeguarding, transmission, and destruction of classified information.

SECURITY TEAM - Guard boarding areas, secure embarkation ladder, secure merchant crew, and maintain watch on crew.

SEQUENCE NUMBER - A number assigned to a ship that dictates its position in a formation (1, 2, 3, etc.).

SELECTED TRIPPING - These are the preselected loads that are tripped during load shed.

SELECTIVE TRIPPING - Tripping the circuit breaker closest to the faulty circuit. This will remove power from the faulty circuit without affecting other, non-faulty circuits.

SELFTACK - An attack conducted by a dipping helicopter on its own target after the helicopter has broken DIP.

SEMIACTIVE HOMING - The launch platform provides the source of energy that the weapon guides on. This is referred to as illumination.

SELF-CONTAINED BREATHING APPARATUS (SCBA) - Type of respirator that allows the user complete independence from a fixed source of air.

SELF-CONTAINED GUIDANCE - Involves sending the weapon from point to point without in-flight corrections based on target position.

SELF DESTRUCT FUSES - Causes the projectile to self-destruct if specific design parameters are not met.

SELF-INCRIMINATION - No person subject to ART. 31 of the UCMJ may compel any person to incriminate himself or to answer any questions the answer to which may tend to incriminate him.

SEMI-AUTOMATIC GUNS - Use propellant energy to open the breech, eject the empty cartridge cases, and close the breech when the next round is manually loaded.

SEMI-DIURNAL - Two high & two low tides each tidal day, occur at regular intervals, small variations between successive highs and lows (U.S. Atlantic Coast).

SENSIBLE HEAT - When heat is added to a material, one of two things will occur: the material will change temperature or the material will change state. When a substance is below the temperature required to change state, the addition of heat will raise the temperature of the substance. (Example: Sensible heat applied to a pot of water will raise its temperature until it boils.)

SENSOR INPUTS - Collects data from radar, sonar, Electronic Warfare (EW), Identification Friend or Foe (IFF) and distributes to a switchboard that receives radar video and transmits that information to the consoles located on the bridge and CIC.

SEPARATE - Leaving a specific engagement; may or may not reenter.

SEPARATE AMMUNITION - Propelling charge and projectile physically separate but loaded into the gun in one operation.

SERPENT - A towed array system (TAS) which is towed by surface ships or submarines.

SEQUENCING - Sequence valves control the sequence of operation between two branches in a circuit; that is, they enable one unit to automatically set another unit into motion.

SERIES CIRCUIT - An arrangement where electrical devices are connected so that the total current must flow through all the devices; electrons have one path to travel from the negative terminal to the positive terminal.

SET POINT - A command to set (or have set) a particular speed. May be in knots/indicated or in Mach, depending upon the controlled aircraft expressed as follows Knots indicated in three digits, i.e. THREE FIVE ZERO (350); Mach - two or three digits with the word. Direction toward which the current is flowing. Separating whole numbers from tenths and hundreds i.e., ONE POINT ONE THREE (1.13) or POINT NINE THREE (.93).

SETBACK - Movable parts move backward upon firing.

SET POINT - The level or value at which a controlled variable is to be maintained. A command to set (or have set) a particular speed. May be in knots/indicated or in Mach, depending upon the controlled aircraft expressed as follows Knots indicated in three digits, i.e. THREE FIVE ZERO (350); Mach - two or three digits with the word. Separating whole numbers from tenths and hundreds i.e., ONE POINT ONE THREE (1.13) or POINT NINE THREE (.93).

SEXTANT - An instrument used for measuring angular distances, especially the angle if the sun, moon and stars. Used at sea to determine latitude and longitude.

SEXUAL HARASSMENT - A form of sex discrimination that involves unwelcome sexual advances, request for sexual favors, and other verbal or physical conduct of a sexual nature.

SFWL/JSN LOG - The Ship's Force Work List/Job Sequence Number Log, or Trouble Log, is the work center's list of all material discrepancies to be corrected either by ship's force or an outside activity.

SH-60 SEAHAWK - Helicopter used for ASW, search and rescue, drug interdiction, anti-ship warfare, cargo lift, and special operations.

SHACKLE - One weave; a single crossing of flight paths; maneuver to adjust or regain formation parameters.

SHADOW(ing) - The observation of an enemy unit or force, usually as a sequel to surveillance or reconnaissance for the purpose of reporting its composition, location movement and any other relevant information. Follow indicated target.

SHAKE OFF - Take avoiding action against aircraft.

SHALLOW - Contact is above layer depth.

SHANK - Vertical portion of an anchor connecting the flukes and top ring.

SHAPED CHARGE WARHEADS - Used against hardened targets such as armored or double-hulled targets.

SHELF LIFE - A period of time for which an instrument can be used without degradation, usually specified by the manufacturer.

SHIELDING FACTOR - A fraction, always less than one, that represents the proportion by which shielding attenuates gamma radiation.

SHIFT - Directive to shift laser illumination to a different target.

SHIFT PATROL - Shift patrol by course ____ and distance ____.

SHINING - Inquisitive call indicating that a fighter is radar locked to a bogey - discriminator such as heading, BULLSEYE or angels may be necessary.

SHIP INFORMATION BOOK - When a ship is built for the Navy, the builder prepares a ship information book (SIB). The ship's crew uses the SIB to familiarize themselves with the ship's characteristics. Normally the SIB will contain the following eight volumes: Hull and Mechanical; Propulsion Plant; Auxiliary Machinery, Piping, Ventilation, Heating, and Air-Conditioning Systems; Power and Lighting Systems; Electronic Systems; Interior Communications; Weapons Control Systems; and Ballasting Systems.

SHIP PARAMETER INPUTS - Information from Gyro, anemometer, and pit sword essential for computer positioning data.

SHIP'S DRAWING INDEX (SDI) - The SDI is kept in the engineering department office (log room). The SDI lists all working drawings that have a NAVSHIPS or NAVSEA drawing number, all manufacturers' drawings, all equipment drawing lists, and all assembly drawings that list detail drawings.

SHIP's FORCE - Personnel assigned to the ship who are responsible for maintenance and operation of the ship's systems and equipment.

SHIP'S GENERAL ANNOUNCING SYSTEM (1MC CIRCUIT) - The ship's general announcing system used to pass information to the ship's crew on a regular basis each day. It is also another means of damage control communication because information can be passed throughout the ship. The 1MC system should be used only to pass warnings or vital information that affects the entire ship's company.

SHIPBOARD ADVANCED RADAR TARGET IDENTIFICATION SYSTEM (SARTIS) - A unique new surface based system intended to augment existing identification systems.

SHIPBOARD TRAINING TEAMS - Training teams include a core group of the most knowledgeable and experienced personnel from the ship. The size of the crew, number of qualified personnel, complexity of the exercise, and safety requirements will influence the size of the team.

SHIP'S SERVICE TELEPHONES - Telephones for damage control communications when there are telephones installed at or near repair party lockers. The ship's service telephones are standard telephones.

SHIPS' DRAFT - The vertical distance from the keel to the waterline.

SHOLE - A flat block that may be placed under the end of a shore to distribute pressure.

SHOOTER - Aircraft designated to employ ordnance.

SHORE - The signal is to be retransmitted on operational point to point circuits as soon as possible after landing. Source APP-1. A portable beam.

SHORE BASED TACTICAL DATA LINKS - Provide signals intelligence or long-range radar images to ships and aircraft.

SHORE POWER - At or near a suitable weather deck location, groups of 400 A receptacles are provided for a shore power connection. Portable cables can be attached to them from the shore or from a ship along side.

SHORT SPLICE - Strongest way to connect two lines.

SHORTSHOT - Submarine believed to have fired from inside the screen.

SHORT-TERM EXPOSURE LIMIT (STEL) - The maximum concentration of a substance to which personnel can be exposed for up to 15 minutes without significant physiological effects (i.e., irritation, narcosis, impairment of self-rescue), provided that no more than four exposures per day are permitted and at least 60 minutes elapses between exposure periods.

SHORT-TERM LETHAL CONCENTRATION (STLC) - A concentration of a substance that is lethal within 10 minutes of exposure.

SHOTGUN - Informative call indicating a prebriefed weapons state at which separation/bugout should begin.

SHOTS - 15-fathom (90 foot) lengths of chain; may be connected to by detachable links.

SHRINK - A short-term decrease in drum water level that results from a change in the firing rate or steam flow without any corresponding change in the feeding rate. Since flow of water into the boiler must correspond to the outflow of steam, the feeding rate must be decreased when shrink occurs.

SIDEREAL HOUR ANGLE (SHA) - The hour circle of a star or planet measured westward from the first point of Aries from 0° through 360°.

SIDEREAL TIME - A reference time system for the stars' apparent rotation about the earth.

SIDEWALL___ - An offset RV in AIR/SUB co-operation at time____.

SIGNAL DATA CONVERTER/GUN MOUNT PROCESSOR (SDC/GMP) - A digital processor and interface unit that receives filtered target data and control commands from the Gun Computer Console (GCC) and ship's attitude (pitch and roll) and clock data from the clock/gyro data converter cabinets to develop two ballistic solutions for the target being engaged.

SIGNAL DATA RECORDER-REPRODUCERS - Contain four tape drives that are unique from other DDG-51 class standard AN/USH-26 (V).

SIGNALMAN - Sends visual signals between UNREP stations when directed by the rig captain.

SILENT - Broadcast station is not transmitting. May also be used as an order and must be followed by a frequency or station designator. If possible it should be followed by an estimated time of return to the air.

SILENT UNREP - Performed without radios, using only signal flags or lights.

SINGLE MAIN FIREMAIN SYSTEM - Consists of a single piping run that extends fore and aft. This type of firemain is generally installed near the centerline of the ship, extending forward and aft as far as necessary.

SIGHT ANGLE - The difference in elevation between the line-of-fire and line-of-sight.

SIGHT DEFLECTION - The difference in bearing between the line-of-fire and the line-of-sight.

SIGHT REDUCTION - The process of deriving from a sight the information needed to establish a line of position.

SIGHT REDUCTION TABLES - Tables for performing sight reduction, particularly those for comparison with observed altitude, to determine altitude difference and establish a line of position.

SIGNALED COURSE - The true course being steered or to be steered by the guide of the formation.

SIGNALED SPEED - The speed at which the formation has been ordered to proceed.

SILVER/ALUMINUM - Counter-measures projectile.

SINGLE - One object. Descriptive call indicating one aircraft.

SINGLE UP - Leaves (sends) only one standing line to the pier; this single line will have an eye at the pier end.

SINKER - A radar contact that later disappeared.

SISTER - Assisting ship of surface ASW unit.

SITUATION REPORT (SITREP) - SITREPs are used to report significant events that do not meet the reporting criteria for OPREP messages.

SITUATIONAL AWARENESS BEACON WITH REPLY (SABRE) - Uses miniaturized Global Positioning (GPS) and Ultra High Frequency Satellite Communications (UHF SATCOM) equipment and provides position, altitude, heading, velocity, and identification information to any user within the satellite footprint.

SIXGUN - In AIR/SUB cooperation, a method to achieved plot-lock.

SKATE - Informative/directive to execute launch and leave tactics.

SLACK WATER - Period of time when there is little or no movement of water due to tidal currents.

SKIMMER - Search aircraft of ASW air search and attack team.

SKIN DOSE - Radiation from a source outside the body, possibly on the skin, that can damage the skin.

SKIP IT - Do not attack, cease attack, cease interception. Veto of fighter commit, usually followed with further directions.

SKOSH - Aircraft is out of/or unable to employ active radar missiles.

SKUNK - A surface contact detected by radar.

SKYROCKET - Am about to fire AA shells to burst at HOSTILE's estimated altitude and direction to indicate his approach.

SLAM____ - A submarine in the process of missile launch has been detected. The position of the launch is to be given immediately after SLAM.

SLAMEYE___ - A visual bearing of the missile, missile vapor track, or missile exhaust. The bearing of the launch from the reporting unit and the position of the reporting unit are given immediately after SLAMEYE.

SLAPSHOT (type/bearing) - Directive for an aircraft to employ a range unknown HARM against a specified threat at the specified bearing.

SLICE/SLICEBACK - Directive call to perform a high-G descending turn in the direction stated usually 180-degree turn.

SLIDE - Mounted between two trunnion supports; does not move during recoil; supports and counterbalances the barrel; serves as a mounting surface for components that load the breech and fire the powder case; ejects the empty case.

SLIDING FRICTION - Occurs when the surface of one solid body slides across the surface of another solid body.

SLIDING PADEYE - Slides up and down in guide tracks on a kingpost.

SLINGSHOT - Launch by catapult.

SLIPPING - Informative or directive call indicating the attacker will attack the target at the alternate TOT.

SLOPE - Pulse repetition rate in pulses per second.

SLOW - Any detection with a ground speed of 200 knots to 400 knots. Descriptive call indicating target ground speed of 200 knots to 400 knots.

SLUDGE - Is the gummy or carbonaceous material that accumulates in lubrication. Carbon from the combustion chambers or from the evaporation of oil on a hot surface, such as the underside of a piston, will cause sludge to form.

SMALL STUFF - Line that is 1 3/4 inches or less in circumference.

SMASH - Directive to turn on/off anti collision lights.

SMOKE - Smoke marker used to mark a position or datum.

SMOKE CONTROL ZONE - The area between the inner and outer smoke boundaries established for fires that involve primarily class ALPHA or class CHARLIE materials.

SMUGGLER - Hostile Fast Patrol Boat or Fast Torpedo Boat.

SNAKE - Directive call to oscillate an IR pointer about a target.

SNAP - Directive call to turn to a direction/heading ("RED 1 SNAP 240°").

SNEAKER - An intelligence gathering vessel.

SNIFF - Passive NCTR reply.

SNIFFER - Exhaust trail detection equipment.

SNIPER - Directive for an aircraft to employ a range known HARM against a specified threat at the specified location.

SNOOPER - An aircraft employed in the detection and reporting of opposing forces while avoiding detection by those forces.

SNOOZE - Directive/informative indicating initiation of EMCON procedures.

SNORT - Visually sighted submarine snorkel.

SNORTING - Submarine contact is snorkeling.

SNOW - Sweep jamming.

SO - Sensor Operator, operates radar and MAD equipment; interprets acoustic data; qualified SAR swimmer.

SOFT - The probe has not fully engaged in the drogue.

SOFT PATCH - A patch used to repair small holes or cracks in low-pressure (150 psi) piping.

SOLENOID - Control device that uses electromagnetism to convert electrical energy into mechanical motion. The movement of the solenoid may be used to close a set of electrical contacts, cause the movement of a mechanical device, or both at the same time.

SOLENOID-OPERATED PILOT VALVE (SOPV) - Electrically operated pilot valves that control the activation of many AFFF fire-extinguishing systems. All SOPVs (master and service) have four control line ports; one port is always connected to supply pressure (firemain), and a second port is the valve drain (which should be piped to discharge within the coaming of the AFFF station).

SOLO - Aircraft proceed on independent operations.

SONGBIRD - In AIR/SUB co-operation, a radio homing method (Aircraft as transmitting unit).

SONOBUOYS - Small, self-contained sonar systems deployed by aircraft to detect submarines; data transmitted by VHF radio for signal processing and analysis.

SORT - Directive call to assign responsibility within a group; criteria can be met visually, electronically (radar) or both.

SORTED (BRA) - Informative call indicating that the criteria have been met to ensure individual flight members have separate radar contacts.

SOPA - The Senior Officer Present Afloat of each geographic area ensure the instructions of the fleet commander are carried out.

SOSUS RED - Maritime Enemy Force Alert Message - SOSUS.

SOUNDING - The measured water depth.

SOUND BUOYS - Pillar buoys equipped with a bell, gong, whistle, or horn.

SOUND POWERED PHONES - Sound powered phones are a voice activated means of communicating onboard a ship.

SOUR - Equipment indicated is not operating efficiently.

SPACE SEGMENT - Consists of 24 satellites orbiting 11,000 nautical miles above Earth.

SPADES - An interrogated group/radar contact which lacks the Air Tasking Order established (or equivalent) IFF modes and codes required for the identification(ID) criteria.

SPAN WIRE - A 3/4-inch wire for single hose rigs and 7/8 inch for double hose rigs.

SPAR and PILLAR - Two basic shapes for lighted buoys.

SPARKLE - Target marking by infrared pointer. Target marking by gunship or airborne forward air controller using incendiary rounds.

SPECIAL PURPOSE - Deploys parachute-suspended pyrotechnic candle for area illumination; six types; Illumination, White Phosphorus, Variable Time-Non fragmenting, Blind, Loaded/Plugged, Dummy and Drill.

SPIKED (direction) - Informative call of a RWR indication of a hostile AI radar lock-on ("RED 4, SPIKED, right 2 o'clock").

SPIN - Directive/informative to execute a pre-briefed timing/spacing maneuver.

SPIT(TING) - Lay/launch(ing) buoys.

SPITTER (direction) - An aircraft that has departed from the engagement or is departing the engaged fighters targeting responsibility.

SPRING TIDE - When the sun, earth and moon are in line,gravitational forces reinforce one another causing unusually high tides at the equator and unusually low tides near the poles.

SPECIAL BILLS - Bills that apply during special circumstances. Some examples include those for anti-sneak/anti-swimmer attack, evacuating civilians from enemy territories, handling prisoners of war, handling hazardous materials on a ship preparing for battle, and transporting troops.

SPECIAL MARKS - Yellow marks that are used to identify special areas.

SPECIAL PURPOSE SONOBUOY - Used to measure aspects of acoustic environment including temperature and background noise.

SPECIFIED COMMAND - A command that has broad continuing missions and that is established by the President through the Secretary of Defense with the advice and assistance of the Chairman of the Joint Chiefs of Staff. It normally is composed of forces from a single Military Department. Also called specified combatant command. (Joint Pub l-02).

SPEED MADE GOOD (SMG) - Single resultant speed from a given departure point to a subsequent position; the net speed of movement from one point to another.

SPEED of ADVANCE (SOA) - Intended or desired speed relative to the earth, taking into consideration known or predicted current.

SPEED of ADVANCE (SOA) - Position ship is on PIM line divided by the time is the Speed of Advance (SOA).

SPEED of RELATIVE MOVEMENT (SRM) - The speed at which the contact moves along the Line of Relative Motion (LRM).

SPLASH(ED) - 1. Causeway section (has been) launch(ed) from LST. 2. Informative call hostile aircraft shot down. 3. Weapons impact (A/G)(A/A).

SPLASH POINT - Water entry point of an airborne ASW weapon.

SPLICING - Secures two lines or two parts of the same line by interweaving the strands.

SPLIT - Request to engage a threat visual will not be maintained requires flight lead acknowledgement (air-to-air).

SPLITTING - Contact is dividing.

SPLIT PLANT - The condition in which two, or more generators are operating, supplying power to different sections of the electrical distribution system.

SPMIG - Standard PMS Materials Identification Guide. The SPMIG lists all tools, equipment, and test equipment required to perform PMS. The SPMIG also includes a list and cross-reference of required lubricants, compounds, and cleaning agents.

SPOOK - A Hostile surfaced submarine.

SPOKE - Bearing of a single jamming transmission is_____°T.

SPOKED - The receiver has damaged the drogue.

SPOT - Acquisition of laser designation. Used in conjunction with pre-arranged code numbers designating spot frequencies to direct stations on to intercepted frequency with the use of UP and DOWN ____(MHz).

SPOTTED - You are now within Hostile radar range. Informative call of a RWR indication of a hostile search radar.

SPOTTER - Day or night spotting mission.

SPOOFER - A contact employing electronic or tactical deception measures.

SPOOFING - Information that voice deception is being employed.

SPRING LAY - Preformed cable laid rope consisting of six ropes around a fiber core; used for permanent mooring/alongside towing.

SQUAWK (ING) - Operate IFF as indicated or IFF is operating as indicated (e.g. squawk three code zero zero and ident).

SQUAWKING (MODE) - An informative call denoting a bogey is responding with an IFF mode.

SQUAWK CHARLIE - Turn IFF, mode CHARLIE on for altitude read out.

SQUAWK ECHO - Operate (operating) "I"-band transponder in ECHO Enhanced mode.

SQUAWK FOUR - Turn mode 4 switch on.

SQUAWK IDENT - Activate IFF transponder I/P switch.

SQUAWK LOW - Turn IFF master control to the low sensitivity position.

SQUAWK MAYDAY - Turn IFF master control to emergency.

SQUAWK MIKE - Place IFF master control to MIC. Make short radio transmission.

SQUAWK NORMAL - Turn IFF master control to NORMAL.

SQUAWK STANDBY - Turn IFF master control to STANDBY.

STACK - Two or more groups, contacts or formations with a high or low altitude separation in relation to each other.

STADIMETER - Range finder instrument for determining the distance to an object of known height by measuring the vertical angle subtended by the object.

STANDARD DISTANCE - The standard distance for large ships is 1,000 yards and 500 yards for small ships; the standard distance between a large ship and a small ship is 1,000 yards.

STANDARD COMPASS - Headings read from it are termed "per standard compass".

STANDARD TIME - Time determined by longitude.

STAND - A brief period, at high or low tide, where no rise or fall of the height of tide occurs.

STANDBY DUSTBIN - Nuclear ASW weapon attack approved.

START UP - Start main engines.

STANDARD ORGANIZATION and REGULATIONS of the US NAVY (SORM), OPNAVINST 3120.32(Series)) - The SORM provides guidance and regulation for organization and administration aboard Navy ships and is designed to create standardization among Navy units yet allow the flexibility to be tailored specifically to the ship's missions, configuration, and manning in order to create an efficient organization for personnel and equipment.

STANDARD UNIT - The basic organizational unit, such as that of your ship, in the U.S. Navy.

STAND - Ring-shaped structure mounted on the weather deck; supports rotating gun mount components.

STANDBY - A non-operational mode.

STANDBY PERSON - The person trained in emergency rescue procedures assigned to remain on the outside of the confined space and to be in communication with those working inside.

STANDBY STATION - A ship's position immediately prior to an UNREP from where the sequence of flag hoists will commence the approach.

STANDARD SCORE - The actual advancement exam results.

STANDARD TENSIONED REPLENISHMENT ALONGSIDE METHOD (STREAM) - The system and method of rigging used to perform the cargo transfers.

STANDARD MISSLE - Surface-to-air and surface-to-surface missile, mounted on surface ships.

STANDING END - Inactive part of a line as opposed to an eye or bitter end.

STAR GAUGE - Measures the bore diameter at various points along its length.

STATE CHICKEN - I am at a fuel state requiring recovery, tanker service or diversion to an airfield.

STATE LAMB - I do not have enough fuel for an intercept plus reserve for carrier recovery.

STATE TIGER - I have sufficient fuel to complete my mission as assigned.

STATE TIGER SLOW - I have sufficient fuel to complete a subsonic interception and return to base.

STATIC OVERPRESSURE - A sudden, nondirectional increase in air pressure caused by the passage of the air blast wave from a nuclear burst.

STATION - A specific area assigned to a ship in a formation in the general relative area, patrol line, or sector assignment.

STATION-to-STATION - Circuit between ships' stations; manned by phone talkers.

STATIONING SPEED - A speed slower than operational speed used by a ship when maneuvering or changing station; specified for reasons of fuel economy.

STATUS - Pass tactical situation.

STATUTORY BOARD - Selection boards that include promotion (including special and spot promotion), selective early retirement (SERB), and other various continuation boards.

STEADY - Am on prescribed heading, or straighten out immediately on present heading or heading indicated. Directive call to stop oscillation of IR pointer.

STEAM BLANKETING - A method for making the outer boundaries of a space safe for hot work by using steam to displace and carry off flammable vapor/air mixtures within a space.

STEER___ - Set magnetic heading indicated to reach me (or___).

STEERING COMPASS - Headings read from it are termed "per steering compass".

STERN - Request for or directive to intercept using STERN geometry.

STERN CHOCK - Normally centerline, after-most closed chock.

STERN LINE - Secures the stern to the pier.

STICK - A number of A/C weapons dropped one after another at a predetermined time interval.

STINGER - Within a group, a formation of three or more aircraft with a single aircraft in trail.

STOCK - Prevents the anchor from rolling on the sea bottom.

STOCKLESS ANCHOR - The most common, because it is easy to stow and handle, it gets its holding power from the flukes' length.

STOP - Stop IR illumination of a target.

STOP (ABORT CODE) - FAC directs aircrew to abort the attack. This is a mandatory instruction.

STOP SHAFT - Refers to a shaft that has been stopped in preparation to being locked.

STORAGE - The holding of HM or HW for a temporary period, after which time the HM is used or stored elsewhere, or the HW is treated, disposed of, or stored elsewhere.

STOVEPIPE - A pre-designated area in which a designated submarine may operate and other submarines are to keep clear.

STRAGGLER - A ship separated from its convoy.

STRANGER - An unknown contact not associated with action in progress (bearing, range and altitude relative to you).

STRANGLE - Switch off equipment indicated.

STRANGLE SQUAWK FOUR - Turn mode 4 switch off. Continue squawking other modes as appropriate.

STRAKES - The hull plating fastened to the framework in longitudinal rows.

STREAM - Dispensing of chaff Alfa: Solid; Bravo: Random intervals; Charlie: Bursts.

STREAM SUPPORT LEG - Part of the receiving ship; a variation of a STREAM rig; usually used by carriers.

STRENGTH - Indicates the numerical strength of a track.

STRENGTH DECK - Deck designed to carry not only deck loads on it but also the hull stresses.

STRETCHER-BEARER - The stretcher-bearer is required to take the repair locker first-aid kit, or box, to or near the scene. If medical department personnel are available, they will help them in administering first aid, as required.

STRINGER - Man portable, shoulder-fired, supersonic missile system designed to counter high speed, low level, ground attack aircraft.

STRIPPED - Indicates an AC separated from it's element formation.

STROBE - Radar indications of noise jamming.

STRONGBACK - A bar or beam of wood or metal that is used to distribute pressure or to serve as an anchor for a patch. The strongback is often shorter than a shore.

SUBATOMIC PARTICLE - One of the components of which all atoms are composed (electron, proton, and neutron).

SUBJECT LINE - Begins with SUBJ, followed by a single slash and indicates the basic content of the message.

SUBTERFUGE SEARCHES - An unlawful search conducted that is unreasonable in scope, selective in nature, and is directed at particular individuals.

SUCAP - Surveillance Combat Air Patrol.

SUGAR - Surface to air missile (SAM) state report.

SUNLAMP - In AIR/SUB co-operation, a radio homing method (Submarine as transmitting unit).

SUNRISE - Informative C2 functions are available (opposite of MIDNIGHT).

SUPER - Descriptive call indicating a speed of 600 knots/Mach 1 or greater.

SUPERDUFF - SHFDF equipment or unit fitted with SHFDF equipment.

SUPERHEATED STEAM - Steam heated to a temperature above the saturated temperature of the given pressure.

SUPERSTRUCTURE DECK - A partial deck above the main, upper, or forecastle deck that does not extend to the sides of the ship (if it does, it does not have the side plating carried up to it.).

SUPPORT SHIP - Ships that provide combatant battle groups with high-speed, multiple commodity logistic support.

SUPPLEMENTARY CIRCUITS - Primary circuits related to their principal functions. However, when the circuit is also used for damage control communications, the circuit is considered as a supplementary circuit.

SUPPLEMENTARY SURVEYS - Conducted to confirm or revise stay time calculations. They may also be ordered to localize hot spots for decontamination. Supplementary surveys of interior spaces shall include beta monitoring to detect intrusion of contamination.

SUPPLY VENTILATION - Moving fresh air into a compartment or space and displacing contaminated air through any available openings.

SURF (Standard Underway Replenishment Fixture) - Block used to fairlead the tensioned outhaul line from the receiving station back to the delivery ship.

SURF TRAVELING,ACTUATED REMOTELY (STAR) - The rig consisting of a STAR latch assembly and a STAR probe.

SURFACE BURST - A nuclear detonation in which the fireball is in contact with the surface of land or water.

SURFACE RADAR MODE - The primary operating mode against surface targets.

SURFACE ZERO - The point of detonation of a nuclear surface burst on water.

SURGE BEARING - Used to allow for acceleration and deceleration.

SURVEY - The effort to determine the location and nature of the chemical, biological, and radiological contamination and radiation on or in a ship.

SUSPECT - A track which is potentially hostile because of its characteristics, behavior, origin or nationality.

SUW - Surface Warfare is the detection, tracking and identification of all surface contacts and the engagement of hostile contacts.

SWAP - Executive order for change of Scene of Action Commander.

SWEEP TEAM ONE - Escort BO and ABO to bridge for document inspection; inspect accommodations and cargo; make vessel disposition recommendations.

SWEEP TEAM TWO - Secure engineering spaces; account for engineering personnel; inspect steering, work shops, and cargo; make vessel disposition recommendations to BO.

SWELL - A short-term increase in boiler drum water level that results from a change in the firing rate or steam flow without any corresponding change in the feeding rate. Since flow of water into the boiler must correspond to the outflow of steam, the feeding rate must be increased when swell occurs.

SWEEP - Keep all round search and report any new contacts.

SWEET - Equipment indicated is operating efficiently. (Opposite of SOUR.)

SWING CIRCLE - Circle centered at the position of the anchor with a radius equal to the sum of the ship's length plus the length of chain let out.

SWING CIRCLE - Circle drawn from the actual anchor location with a radius equal to the length of anchor chain veered plus the total length of the ship.

SWITCH - Order telling the designated ship or ships to cease general searching and shift to the frequency of the specified racket, whether or not the racket is within the Duffer's intercept search responsibility.

SWITCH(ED) - Indicates an attacker is changing from one aircraft to another.

SYNCHRO - Carry out a netsync procedure for terminal clock synchronization purposes, beginning in (...) minutes.

SYNCHRONIZING PROTECTIVE DEVICE - A synchronizing protective device is installed on many ships to prevent closing of the circuit breaker unless proper conditions exist. The use of the synchronizing protective device should be a mandatory requirement on ships that have it installed and bypass of this protective device should be allowed only in the event of an emergency.

SYNTHETIC FIBER ROPE - Stowage as significant as for natural fiber rope; sunlight, fluorescent light, and most chemicals cause damage; nylon sensitive to all light radiations and acidic chemicals; polyester sensitive to sunlight and caustic (alkaline) chemicals.

SYNTHETIC ROPES - Nylon, polyester and polypropylene.

SYSTEM MONITORING - Performed by System Monitoring System (SMS) and Entry Query Control (EQCC) to gain access to the computer, load, start, and stop the operational program.

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2000 Yards - 1 nautical mile.

2M MINIATURE/MICRO REPAIR PROGRAM - Repair of miniaturized electronic components at sea.

3-M UP-LINE REPORT - The purpose of up-line reporting within the 3M System is to provide maintenance and material managers throughout the Navy with the means to plan, acquire, organize, direct, control, and evaluate the manpower and material resources required to support maintenance.

TG/TF COMMAND NET - Used to assign warfare responsibilities and transmit data pertinent to operations, EEIs include transmission source, designated action/information only recipients, response requirements, rules of engagement.

TG/TF TACTICAL AND SCREEN NET - Used for reports on specific areas of responsibility, unit movement control, or information important to all units, EEIs include calling/called unit identification, unit tasking, and unit reports.

TACTICAL - Request/directive to switch to tactical control.

TACTICAL AIR COMMUNICATION and NAVIGATION (TACAN) - Uses airborne, navigation sets AN/ARN-21 and AN/ARN-52, in conjunction with surface/shore equipment (AN/SRN-25) to provide navigation information to aircraft.

TACTICAL CONTROL - The detailed and, usually, local direction and control of movements or maneuvers necessary to accomplish missions or tasks assigned. Also called TACON. (Joint Pub l-02).

TACTICAL DIAMETER - The diameter of the half-circle made by a ship in executing a 180-degree turn using constant rudder angle.

TAGOUT - Means to put special tags on equipment to warn other personnel that the equipment must not be operated until authorized personnel remove the tags.

TAG-OUT LOG - A control document for administering tag-out procedures and a record of authorization for each active tag-out action. The log contains the TUMs manual, a Tag-out Index and Record of Audits, TORS, (active and cleared) and an Instrument Log.

TAG-OUT RECORD SHEET - A record of all tags associated with the tag-out

TAILORED SHIP TRAINING AVAILABILITY (TSTA) - A basic training program designed to prepare the ship to proceed to the intermediate and advanced phases of training.

TAKE(ING)___ WITH___ - Engage/am engaging target (indicated) with weapon (indicated).

TALK - Broadcast station is transmitting data. May also be used as an order. May be modified by prowords Clean or Dirty and must be followed by a frequency designator.

TALLY - Sighting of a target, bandit, bogey, landmark or enemy position; opposite of "NO JOY."

TAO - The Tactical Action Officer fights the ship for the Commanding Officer and has weapons release authority.

TARCAP - Target area Combat Air Patrol.

TARGET - Directive call assigning targeting responsibilities ("BLUE 3, TARGET southern group - BLUE 3").

TARGETED (-) - Group responsibility has been met.

TARGET ANGLE - The relative bearing of ownship from a target ship.

TARGET DESIGNATION SYSTEM - Connecting link between the search radar and the gunfire control system; Target Designation Transmitters are mounted binoculars serving as an alternate source of target information for the gunfire control system.

TATTLETALE - A unit maintaining contact on a target from a position which enables it to pass targeting information to other units.

TATTLETALE LINE - Small, natural line spliced into synthetic fiber lines to provide an indication of the working load placed on the fiber line.

TATTOO - A reference number, other than a track number, unique to a class of vessel or an individual vessel of a class used to describe the identity of a contact.

TEAM LEADER - The team leader directs the efforts of attack teams to extinguish or overhaul a fire.

TEAR AGENTS - Tear agents (also known as riot-control agents) are essentially local irritants, which, in very low concentrations, act primarily on the eyes, causing intense pain and a considerable flow of tears; stinging of warm, moist skin; and irritation of the nose. High concentrations produce irritation of the upper respiratory tract and lungs and cause nausea and vomiting. The agents may be either solids or liquids and may be dispersed in the air as vapors or smokes.

TECHMANs/CSTOMs - A reference for corrective ship's force-level maintenance.

TEN SECONDS - Directive to terminal controller to standby for Laser on call in approximately ten seconds.

TERMINAL ELIGIBILITY DATE (TED) - The last possible date for service members to meet their required time in rate to take the advancement exam.

TERMINAL PHASE - Portion of weapon flight from target acquisition to impact.

TERMINATE - 1. Cease local engagement without affecting the overall exercise. 2. Stop laser illumination of a target.

TERRESTRIAL GUIDANCE - Involves comparison of stored information about the terrain over which the weapon is flying with observations of the terrain by optical or radar equipment in the weapon.

TERRITORIAL SEA - A zone of the ocean extending from the U.S. coastline out to 3 nm from shore.

TEST MODE - Provides a means of checking general operating conditions of the gunfire control system.

TEXT - Contains the main thought or idea of the message.

THREAT - Informative call of an untargeted bandit/bogey with pre-briefed range/aspect of a friendly.

THERMAL RADIATION - Electromagnetic emissions in the form of light and heat.

THERMAL RADIATION INJURY - Can cause burn injuries directly when the skin absorbs radiant energy. It can also cause burn injuries indirectly as a result of fires started by the radiation. The flash of thermal radiation from the fireball produces direct burns, called flash burns. The indirect, or secondary, burns are called flame burns. These burns are like the skin burns that are caused by any large fire, no matter what its origin.

THREAT EVALUATION - Determines the degree of threat (threat priority) that the track presents to own ship or other ships in company.

THRESHOLD LIMIT VALUES (TLV) - Levels of airborne concentrations of physical agents, expressed in parts per million (ppm), that represent conditions under which average personnel may be repeatedly exposed, during normal working hours, without adverse effects.

THROTTLES - Reduction in power to decrease IR signature.

TIDAL CURRENT - Current caused by the gravitational interaction of the earth and moon, and to a lesser extent, the earth and sun.

TIDAL CURRENT PREDICTIONS - Published annually for the United States and parts of Asia.

TIDAL DAY - The earth's rotation coupled with the moon's orbit that produces 24 hours, 50 minutes.

TIDAL REFERENCE PLANE - Level of water used on charts for measuring the ocean depth and tide height, mean lower low water is commonly used on charts as the reference plane.

TIDE - Vertical rise and fall of the level of the ocean caused by the gravitational forces of the earth the moon, and to a lesser extent the sun. In general, there are two highs and two lows at a given location during a 24-hour period. Positive radar contact with element/aircraft.

TIED ON - Number two or other formation aircraft has established contact on leader and will maintain appropriate position.

TIDE RIPS - Strong currents along shorelines generated by large volumes of water crossing major depth changes.

TIGER - Enough fuel and ordnance to accept a commit.

___TIGHT - Do not open fire unless target(s) has (have) been identified as HOSTILE. Weapon control status; prefixed by the appropriate weapon codeword or general term "WEAPON."

TIMBER - Air Control Network Participating Group of LINK 16/TADIL-J.

TIMECHECK - Informative call to check/change IFF code.

TIME DIVISION MULTIPLE ACCESS - Allocation of unique time slots to allow multiple user access to a common channel.

TIME of FILE - When message was typed.

TIME in RATE (TIR) DATE - The beginning date that a service member gets credit for time in rate.

TIME ZONE - Band of longitude where the time is considered to be the same as at the base meridian of the zone.

TIT FOR TAT - One or more countermarking units overtly stationed for immediate retaliation against the marker.

TO - Action addee(s).

TOMAHAWK - Long range, subsonic cruise missile used for land attack warfare, launched from surface ships and submarines.

TOMCAT - A surface picket or picket group which is responsible for early identification of Friendly aircraft returning and for acting as reference point for such aircraft when they proceed through the AAW area.

TOOL SHED - Airborne VHF homing equipment.

TORQUE - Is defined as a force or combination of forces that produce or tend to produce a twisting or rotary motion.

TOP SECRET - Highest degree of protection.

TOTAL PROTECTION (TP) ZONE - A zone within a collective protection system that provides protection against liquid, solid, and gaseous CBR agents.

TOUCHDOWN - Boats have contacted the beach.

TOXIC - A substance which when ingested, inhaled, or absorbed through the skin in sufficient amounts can produce harmful effects such as changes in living tissue, impairment of the central nervous system, severe illness or, in extreme cases, death.

TOXIC GAS BILL - The Toxic Gas Bill specifies the procedures and assigns duties and responsibilities for controlling and minimizing toxic gas casualties.

TOXIC MATERIAL - A solid, liquid, or gas that can damage living material, impair the central nervous system, or cause illness or death through inhalation, ingestion, or skin absorption.

TOXIC OR HAZARDOUS ATMOSPHERE - An atmosphere containing a concentration of air contaminants sufficient to cause injury to personnel.

TOXICITY - The property of a material to cause injury to an organism with the maximum result being incapacitation or death.

TOXICITY LIMITS - The limits of a vapor from a certain minimum concentration (lower limit) to a maximum concentration (upper limit).

TOXINS - Poisonous products of living organisms that, when inhaled, swallowed, or injected into man or animals, will cause illness or death.

TRACK - Intended horizontal direction of travel with respect to the earth, taking into consideration effects including current, wind, and seas.

TRACKING - 1. Stabilized gun solution. 2. Continuous illumination of a target. 3. Contact heading. The process of accurately determining and predicting target position.

TRACKING - 1. Stabilized gun solution. 2. Continuous illumination of a target. 3. Contact heading.

TRACKING ___SPEED___ - By my evaluation, contact is steering true course and at speed indicated.

TRACK QUALITY - Value assigned a track as a measure of positional accuracy.

TRACK-WHILE-SCAN (TWS) - A feature that will scan 360 degrees to search for contacts.

TRACTORS - Towing aircraft.

TRADE - Hostile surface raiders are in the offing (this is a warning message and is followed by the general direction of the approach of the raiders e.g. TRADE south).

TRAIL - Track (or shadow) (The words "landward" or "seaward" may be used to indicate from which side of enemy unit to shadow).

TRAILER - Aircraft which are following and keeping a designated airborne contact under surveillance.

TRAILERS - Descriptive call indicating additional bogeys/bandits following the mentioned contacts/group.

TRAIL SHAFT - Refers to the shaft that is off line and is not propelling the ship. The trail shaft is able to freewheel as the ship moves through the water.

TRAIN CIRCLE - A red circle painted on the deck indicating the outer limit of the "swing" arc of the equipment.

TRAINING EXERCISES (TRXs) - Formal drills, conducted both underway and inport, and are used to practice operational tasks and to evaluate unit readiness. They are usually conducted as team training.

TRAIN and ELEVATION DRIVE ASSEMBLIES - Motor driven structures that form the CIWS platform and mount.

TRAINERS, EVALUATORS, AND SAFETY OBSERVERS - Trainers, evaluators, and safety observers directly observe individual and team performance of the training event and some may act as initiators.

TRAINING CIRCLE - Gear inside the stand that engages gun mount power drives to move the gun mount.

TRAIN WARNING BELL - A bell affixed to equipment which sounds whenever the unit is rotated, except during General Quarters, to alert personnel that the equipment in moving.

TRANSFER - The distance gained in a direction perpendicular to that of the original course line from the time the rudder is shifted over until it steadies on the new course.

TRANSFER HAZARD - Radioactive contamination that can be spread from a contaminated area to a clean area by foot traffic or some other form of physical contact.

TRANSIENT DOSE - A term used in some texts to describe the radiological dose received from the time of arrival of fallout or the base surge to the time of cessation of fallout.

TRANSIENT RADIATION EFFECTS ON ELECTRONICS (TREE) - Caused by initial gamma and neutron emissions from a nuclear burst. These emissions result in the failure or degraded operation of sophisticated solid-state circuits.

TRANSFER - Distance gained at right angles to the original course,measured from the line representing the original travel direction to the point of turn completion.

TRANSFER STATION MARKERS - Displayed to indicate the type of cargo being transferred at the station; station marker light box is used at night; bunting or painted areas are used during the day.

TRANSIT RADIATION - Radiation from radioactive particles or droplets in the environment around the ship.

TRANSLATE (ing) - Move point of origin of barrier (point of origin is moving) at course and speed indicated. Time to start and stop may be specified also.

TRANSMISSION FACTOR - A fraction, always less than one, that represents the proportion by which shielding attenuates gamma radiation.

TRASHED - Informative call that missile has been defeated.

TRAVEL - Change radar frequency.

TRAVELLER - A suspect surface track following a recognized traffic route.

TREMBLE - Modulation/rate of conical scan in Hertz.

TRESPASS (POSITION) - Informative indicating flight is entering surface to air threat ring of a specific system at the stated location.

TRIANGULATION METHOD - Take a round of bearings on three or more objects around the ship with a gyro repeater and plot a fix on the chart.

TROLLEY - A device that slides along the highline where the load is suspended.

TROLLEY METHOD - A trolley shackle is attached to the buoy wire and used to ease the anchor chain down to the buoy.

TROUT - Take a DF bearing on transmission indicated.

TRUE - Refers to the geographic meridian.

TRUE BEARING - A bearing always measured from true north (000°T) clockwise in degrees to the line of sight.

TRUE MOTION - Movement in relation to the earth, specifically the North Pole.

TRUE POWER - The power dissipated in the resistance of the circuit, or the power actually used in the circuit.

TRUE WIND - The velocity and direction FROM which the true wind is blowing.

TRUNNIONS - Projections mounted on each side of the slide that provide the axis of rotation for gun elevation.

TSCO - Top Secret Control Officer - Maintains a system of accountability (e.g. registry) to record the receipt, reproduction, transfer, transmission, downgrading, declassification and destruction of command Top Secret information.

TUCKER - Main gun armament.

TUMBLEWEED - Indicates limited situation awareness; no joy; blind; a request for information.

TUNE - Send a continuous signal on the central radio frequency for 30 seconds, beginning in (...)minutes for radio receiver frequency tuning purposes.

TURNBUCKLE - A metal coupling device consisting of an oblong piece internally threaded at both ends and two threaded rods that form a unit that can be adjusted for tension or length.

TURN - A movement whereby all ships turn together on signal.

TURN BEARINGS - Used to allow for the advance and transfer of a ship.

TWO-BLOCKED - Causeway is completely against upper hold shelf (of LST) and ready to be lashed.

TWO-CYCLE FUSE OPERATION - Occurs in arming and firing, as the projectile leaves the bore, fuses are armed by setback and centrifugal forces, keeps the projectile "boresafe" and safe to handle until fired.

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ULTRADUFF - UHF/DF equipment or unit fitted with UHF/DF receiver.

UNABLE - Cannot comply as requested or directed.

UNABRIDGED NAVY INDEX of PUBS and FORMS (NPFC 2002) - Delineates all of the publications and forms available to naval personnel.

UNDERGROUND BURST - A nuclear explosion centered below the surface of the ground.

UNDERWATER BURST - A nuclear burst centered below the surface of a body of water.

UNDERWATER SHOCK - A pressure wave that travels outward in water from an explosion at or under the surface.

UNDERWATER SHOCK INJURY - Injury among topside and below-deck personnel by the rapid upward movement of the deck.

UNDULY FAMILIAR RELATIONSHIP - A relationship between two individuals that is improper and known.

UNGROUNDED SYSTEM - A distribution system in which there is no intentional connection from ground (ships hull) and any line conductor or the neutral of a three-phase ac distribution system.

UNGUIDED WEAPONS - Usually projectiles fired at targets of limited range; guided weapons are self-propelled, and generally have a greater range.

UNIFIED COMMAND - A command with broad continuing missions under a single commander and composed of forces from two or more Military Departments, and which is established by the President, through the Secretary of Defense with the advice and assistance of the Chairman of the Joint Chiefs of Staff. Also called unified combatant command. (Joint Pub l-02).


UNIFORM CODE of MILITARY JUSTICE - The UCMJ is the bedrock of military law. It is a federal law, enacted by Congress.

UNIFORM REGULATIONS (NAVPERS 15665 Series) - Promulgates general orders governing the uniforms and appearance of personnel in the navy.

UNITED STATES - The U.S. includes the Commonwealth of Puerto Rico, Virgin Islands, Guam, American Samoa and the Commonwealth of the Northern Marianas Islands.

UNITED STATES COAST GUARD (USCG) - Sets the safety standards for all vessels operating within U.S. waters.

UNIT BILLS - Provide the policies for personnel assigned to duties and stations when the concerted effort of most or all of the ship is required to accomplish a given evolution or function.

UNKNOWN - An evaluated track which has not been identified.

UPDATE CASREP - Reports information that was not previously reported (or which has otherwise changed) in the Initial CASREP or in previous Update CASREPs.

UPPERDECK - A partial deck extending from side to side above the main deck amidships.

UPPER CARRIAGE ASSEMBLY - Pair of brackets that hold the trunnion brackets.

UPPER EXPLOSIVE LIMIT (UEL) - Upper end of the explosive range. Concentrations above this limit are too rich to explode or burn. Concentrations below the LTEL are within the explosive range.

URINALYSIS PROGRAM COORDINATOR (UPC) COURSE - One-day training for command UPCs that teaches the correct procedures for administering a command urinalysis program.

USER - Authorized to draft, release, and process electronically transmitted messages; responsibility is to conform to all regulations governing the use of the DOD record messaging systems.

USER SEGMENT - Consists of hand-held or mountable receivers.

UPSET (EMP, TREE) - Temporary degradation in an electrical or electronic system caused by electromagnetic pulse (EMP) or transient radiological effects on equipment (TREE). USE OF FORCE - Use of force determined after evaluation of crew response to boarding.

USW - Underseas Warfare is the detection, tracking and classification of all undersea contacts, including mines, as well as the engagement of hostile submarines.

USW AIRCRAFT SENSORS - Multiple sensors used to detect and classify submarines.

USW MODE - Aircraft mission is to classify, localize, and potentially attack a submarine threat.

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VACUUM - Pressures lower than atmospheric; in steam plant, a mixture of very little air and low density steam.

VALLEY - Interfere with threat communications frequency indicated or accordance with previous orders. May be modified by JULIET to indicate jamming or SIERRA to indicate spoofing. With proword AM VALLEY indicates activity is taking place.

VAMPIRE - HOSTILE anti ship guided missile.

VAPOR - The product of the evaporation of seawater feed.

VAPOR - Gas state of a substance.

VAPORIZATION - To pass into the gas or vapor state.

VAPOR SECURE - Establishing a film or foam blanket over flammable liquid to prevent vaporization.

VARIABLE TIME - Detonates the projectile in the target's proximity.

VARIABLE TIME-INFRARED (VT-IR) - Incorporates a passive-sensing device that detonates upon detecting infrared radiation from an aircraft's exhaust gases.

VARIABLE TIME-RADIO FREQUENCY (VT-RF) - Incorporates a radio transceiver into the projectile; detonates upon sensing the target's reflected signal strength.

VARIATION - The difference between true north and magnetic north, it is east if the compass points eastward (right) of true north, and west if it points westward (left) of true north.

VAT"B" (See also BOWWAVE) - Short form weather report giving" (V=Visibility in miles; A=Amount of clouds in eighths; T=Height of cloud top in thousands of feet; B=Height of cloud base in thousands of feet.)

VBSS - Visit, Board, Search, and Seizure.

VBSS TEAMS - Crucial to enforcing limitations of trade with Iraq; Rules of Engagement established within UN resolution language and U.S. Policy.

VECTAC - Vectored attack. Type may be specified as RADAR.

VECTOR - Alter heading to magnetic heading indicated. (Use of true headings to be established before operation commences). Heading ordered must be in three digits; (for homing, use STEER).

VECTOR CHARTS - Created electronically from the beginning; look different than paper charts; portray charted features as points, lines, or areas with amplifying information (attributes); zooming reveals details.

VECTOR DIAGRAM - Used to determine the course and speed of the reference and maneuvering ships.

VECTOR LEFT/RIGHT - Alter course to left/right of present course.

VELOCIMETER - Used to measure initial velocity (IV) of each 5"/54 round fired from the gun mount.

VELOCITY - The rate of motion in a particular direction. The velocity of fluids is usually expressed in feet per second.

VENTILATING - The process of moving air into or from a compartment or space.

VENTURI - The part of a tube, channel, pipe, and so forth tapered to form a smaller or constricted area.

VERTICAL LAUNCH (VLA) - Quick reaction, all weather, intermediate range, Anti-Submarine Warfare (ASW) weapon launched from surface ships.

VERTICAL OFFSET LOOP FIREMAIN SYSTEM - Consists of two single piping runs, installed fore and aft in an oblique (that is, angled) plane, separated both vertically and athwartship, connected at the ends to form a loop. The lower section of the firemain is located as low in the ship as practical on one side, and the upper section is located on the damage control deck on the opposite side of the ship. Athwartship cross-connects are usually provided at each pump riser.

VERY HIGH - Above 50,000 feet. Descriptive call indicating target altitude above 50,000 feet MSL.

VERY LOW - Below 500 feet. Descriptive call indicating target altitude below 500 feet AGL.

VERY QUICK FLASHING (VQF) - Duration of light is less than duration of darkness. The frequency is at least 100 times per minute.

VERY SLOW - Descriptive call indicating a target ground speed of less than 200 knots.

VESSEL DISPOSITION - MIF commander makes final determination; detained vessels are held until another country agrees to accept the vessel; MIF forces are responsible for detained vessels and provide food, water, and medical care.

VIC - Three groups, contacts or formations with the single closest in range and two contacts, azimuth split, in trail.

VICTOR - VHF/AM radio.

VICTORDUFF - VHF/DF equipment or unit fitted with VHFDF receiver.

VIRUSES - A group of parasitic microorganisms that live in the cells of their selected hosts.

VISCOSITY - Tendency to resist flow. A liquid of high viscosity flows very slowly. The preferred unit of measurement for the Navy is the centistokes (cSt). The viscosity of oil is determined by measuring the time required for a specified volume of fluid to flow through a calibrated capillary tube at a specified temperature.

VISEGRIP - Bearing and range between barrier submarine and coordinating aircraft has been established.

VISUAL - Sighting of a friendly aircraft ground position; opposite of BLIND.


VISUAL NAVIGATION - A remotely operated camera that takes pictures of navigation aids and correlates them with a gyro input bearing will replace the Quartermaster using a gyrocompass on the bridge wing to shoot bearings.

VISUAL SCANNING - Aircrew looks for periscope wakes and shadows using binoculars, electro-optical devices, or night vision goggles.

VOICE - The signal is to be retransmitted as soon as the aircraft is in UHF/VHF contact with its shore base.

VOLTAGE REGULATOR - Device used to regulate the output voltage of a generator. Two types, manual and automatic voltage regulators.

VOLATILITY - The readiness of a liquid to vaporize or evaporate. The tendency to be readily diffused or dissipated in the atmosphere, especially at ordinary temperatures.

VOLCANO - HOSTILE anti ship guided missile signal.

VOLUME of FLOW - The quantity of fluid that passes a certain point in a unit of time. The volume of flow is usually expressed in gallons per minute (gpm) for liquids and cubic feet per minute (cfm) for gases.

VOMITING AGENTS - These agents are dispersed as aerosols and produce their effects by inhalation. These agents produce minor eye irritation and a feeling of pain and sense of fullness in the nose and sinuses.

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WALL - Three or more groups or contacts primarily split in azimuth.

WALTZ - The unit(s) indicated commence parallel keying on current circuit(s) and ordered circuit(s). (To be used with DANCE or KICK for ordering anti-jam counter-measure two).

WARHEAD SECTION - Designed to inflict damage on the target.

WARNING RED - Attack is imminent or has already commenced.

WARNING YELLOW - Attack is probable.

WARNING WHITE - Attack unlikely without adequate warning.

WASTE OIL - Oil whose characteristics have changed markedly since being originally refined and has become unsuitable for further use, and is not considered economically recyclable.

WATCH - Continue to sweep as directed and concentrate on the contact designated but do not report unless there is a material change in this contact.

WATCHDOG - A surface picket whose main task is AAW.

WATCHER - Helicopter sub-control unit.

WATCHTOWER - Command and Control Information System.

WATCH/DUTY OFFICER - The Ship's force person responsible for supervising the tag-out log.

WATERLINE - The water level along the hull of a ship afloat.

WATER ENTRY ACTIVATION - Force of impact or seawater activates sonobuoy components.

WATER JACKET - Internal passages and cavities cast into the cylinder block of engines and air compressors through which water is circulated around and adjacent to friction (heat) areas.

WATERTIGHT INTEGRITY - The degree of quality of watertightness.

WAVE OFF - Do not land. Further approach dangerous. Clear ship.

WEAPONS__ ____-___(-___) - I have ___semi-active plus___ passive homing missile. Remaining and gun ammunition is (PLUS, MINUS, ZERO). PLUS - Gun(s) fitted and sufficient ammunition for a gun attack. MINUS - Gun(s) fitted but not sufficient ammunition for a gun attack. ZERO - No gun(s) fitted. A fourth character can be given to indicate the number of front hemisphere capable missiles available. (E.g. an aircraft with a serviceable radar, loaded with 2 sparrows, 2 phoenix, 2 sidewinder AIM9L, and fully loaded gun would report its state as "4-2-PLUS-6").

WEAPON CONTROL GROUP (WCG) - A general-purpose digital computer located in the electronics enclosure.

WEAPONS FREE - Fire only at targets not positively identified as friendly in accordance with current ROE.

WEAPONS HOLD/SAFE - Fire only in self-defense or in response to a formal order.

WEAPONS TIGHT - Fire only at targets positively identified as HOSTILE in accordance with current ROE.

WEAPONS PAIRING - The assignment of the optimum weapon for a given threat based on its relative threat priority and available assets to ensure a probable kill.

WEATHERDECK - A deck or part of a deck exposed to the weather.

WEATHERING - The process by which radiological contamination is removed from the ship's surface areas by the natural action of the environment, especially wind and rain.

WEAVE - Continuous crossing of flight paths.

WEDGE - A block, triangular on the sides and rectangular on the butt end.

WEEDS - Indicates that aircraft are operating close to the surface.

WEEKLY PMS SCHEDULE - A visual display of PMS scheduled for accomplishment in a given work center during a specific week. It is posted in each work center and is used by the Work Center Supervisor to assign and monitor the accomplishment of required PMS checks by work center personnel.

WHAT LUCK - Request for results of assigned mission or task.

WHAT STATE - Report amount of fuel and armament remaining. Ammunition and oxygen are reported only when requested or critical.

WHAT WEAPONS - Report number of semi-active and passive homing missiles/gun ammunition remaining (See WEAPONS for methodology).

WHAT's UP - Is anything the matter?

WHEEL - A wheeling movement is an evolution, called corpen, whereby a formation course is changed without altering the arrangement of ships.

WHISPER(__) - Slow to below cavitation speed or speed indicated.

WHISTLE SIGNALS - Used when preparing to shoot shot line, ready to receive shot line, and shooting shot line.

WHITE - Illuminating projectile.

WILDCAT - Used to hoist and control lowering of the anchor.

WILLIAM FITTINGS - Marked with a black W, these fittings are kept open during all material conditions. WILLIAM fittings are secured only as necessary to control damage or CBR contamination and to make repairs to the equipment served.

WINCH - Mechanical device used to slack off or heave in saddle whips and span wire.

WINCH OPERATORS - Inhaul/outhaul operators.

WINCHESTER - Informative call indicating the aircraft is out of ordnance.

WIRE ROPES - Consists of three parts: wires, strands, and core.

WIRE ROPES SIZE - Number of WIRES are laid together to form the STRAND; size of wire rope is designated by its diameter; main types of wire rope used by the Navy have 6, 7, 12, 19, 24, or 37 wires in each strand.

WIRE-STRAND CORE - Resists heat better than a fiber core; adds about 15 percent to wire rope strength.

WOLF - Visually identified surfaced HOSTILE submarine.

WOLFHOUND - Visually identified surfaced HOSTILE submarine with a missile firing capability.

WOODPECKER - Close In Weapon System (CIWS).

WOOFER - Off board active radar decoy.

WORDS - Directive or interrogative regarding further information or directives pertinent to mission.

WORK - The result of force moving through distance.

WORKING - I am working with another submarine. 1. SEAD aircraft is gathering EOB on a signal of interest. Generally followed by signal type, bearing and range if able. 2. A/A aircraft executing EID on a specific aircraft group to obtain identification necessary for BVR employment (air).

WORK CENTER PMS MANUAL (43P1) - The 43P1 is a compact source of PMS information for the work center. This record is kept in the work center office/work space and is maintained by the work center supervisor. It is used as a ready reference of PMS requirements for the Work Center Supervisor and division officer.

WORK CENTER REPRESENTATIVE - Is normally the PIOC of a specific work item or the WCS of the work center performing the work item.

WORK CENTER SUPERVISOR (WCS) - The senior petty officer in charge of a maintenance group who is responsible for 3M system operation within the work center.

WORK PACKAGE - Contains a listing of all work items that the ship has requested to be accomplished by outside repair activities during assigned maintenance availability.

WORLD PORT INDEX - A numerical tabulation of information about world ports.

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XMT - Addee that is a participant of an Address Indicating Group (AIG) or a Collective Address Designator (CAD) which will be "exempted" from receiving the message.

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YARDSTICK - Directive to use A/A TACAN for ranging.

YELLOW BAND - Enough explosive to cause the ammunition item to function as a high order explosive.

YELLOW ZONE - Navy term for behaviors that many people find unacceptable and could be considered sexual harassment, especially if the behavior occurs repeatedly, and the behavior is unwelcome to the recipient.

YIELD - The energy released in a nuclear explosion stated in terms of the tonnage of TNT required to release an equivalent amount of energy. YOYO - Subordinate element/AC cleared to strip in order to target separate group, but will not be supported by lead element/AC.

YUKON - In AIR/SUB co-operation the prefix used by the submarine to pass homing information to the aircraft.

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ZENITH - The point on the celestial sphere directly above an observer or geographical position.

ZONE DESCRIPTION - The number, with its sign, that must be applied to zone time to obtain Greenwich Mean Time.

ZONE INSPECTION - A shipboard Inspection that divides the ship into zones, or sections, to provide manageable areas to inspect.

ZONE INSPECTION DISCREPANCY LIST (ZIDL) - A form used to document the results of a Zone Inspection.

ZONE TIME - Mean solar time at the standard meridian.

ZERO POSITION - References position for navigational systems of tactical fighter aircraft.

ZIPLIP - 1. Hold communications on this circuit to a minimum. 2. Directive call to minimize radio transmissions.

ZIPPER - Technique involving the keying of a microphone a prearranged number of times to convey a message with predetermined meaning. (e.g. Two keying sequence to mean message receipt).

ZIPPO - Alerts units that a missile attack is imminent or in progress./ Suffix letters/numbers indicated the type of threat and reactions required.


ZIPPO TIGHT - Inhibits all reactions to threats. ZIPPO's should not be called.

ZOMBIE - A SUSPECT air track conforming to ATC rules or following a recognized traffic pattern.

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A&A - Advice and Assist (Team)
AAFS - Amphibious Assault Fuel System
AAWC - Anti-Air Warfare Commander
AAR - Aircraft Sccident Report; Air-to-Air Refueling
ABC - Automatic Boiler Control
ABM - Antiballistic Missile
ABT - Automatic Bus Transfer
AC - Active Component
AC - Alternating Current
ACC - Air Combat Command (US Air Force)
ACM - Asbestos Containing Material
ACN - Activity Control Numbers
ACO - Action Cut-out
ACDS - Advanced Combat Direction System
ACLS - Automatic Carrier Landing System
ACS - AEGIS Combat System, Afloat Correlation System
ACPG - Advanced Chemical Protective Garment
ACSM - Acoustic Sarfare Support Measures
AC & R - Air Conditioning and Refrigeration
ADDU - Additional duty
ADSEP - Administrative separation
ADSW - Active Duty for Special Work
ADA - Air Defense Artillery
ADS - AEGIS or Automated Display System
ADT - Active Duty for Training
ADT - Automatic Detection and Tracking
ADP - Automatic Data Processing
ADZ - Amphibious Defense Zone
AEGIS - Shipboard Integrated AAW Combat Weapons Wystem
AEL - Allowance Equipage List
AEW/C - Airborne Early Warning/Control
AFFF - Aqueous Film-Forming Foam
AI - Air Interdiction
AKNLDG - Acknowledge Message
ALZ - Assault Landing Zone
ALNAV - All Navy Message
ALUSNA - American Legation U.S. Naval Attaché
AMLCD - Active Matrix Liquid Crystal Display
AMR - Auxiliary Machinery Room
AMRs - Auxiliary Machinery Rooms
AN - Airman
AN/SLQ-25A NIXIE - Towed Torpedo Decoy
AN/SLQ-32(V) - Electronic Warfare Suite
AN/SPY-1 - 3D Phased-array radar associated with the Aegis Weapon System (AWS)
AN/SQQ-89(V) - Undersea Warfare (sonar) suite
AN/SQR-4 - Undersea Warfare (sonar) Data Link
AOA - Amphibious Objective Area; Amphibious Operating Area; Angle of Arrival; Angle of Attack
AOR - Area of Responsibility
APIC - Allied Press Information Center
AP - Acquisition Professional
APD - Automatic Paralleling Device
APL - Allowance Parts List
APU - Auxiliary Power Unit
ARC - Alcohol Rehabilitation Center
ARD - Alcohol Rehabilitation Department
ARG - Amphibious Ready Group
ASAT - Anti-Satellite
ASMD - Anti-Ship Missile Defense
ASROC - Anti-Submarine Tactical Air Controller
ASTAC - Anti-Submarine ROCket
ASWE - Anti-Submarine Warfare Evaluator
ASWO - Anti-Submarine Warfare Officer
ASW SCOT - Anti-Submarine Warfare System Consolidated Operability Test
ASROC - Anti-Submarine Rocket
AT - Annual Training
ATE - Automatic Test Equipment
ATF - Advanced Tactical Fighter
ATF - Amphibious Task Force
ATG - Afloat Training Group; Amphibious Operating Area; Angle of Arrival; Angle of Attack
ATO - Air Tasking Order
ATP - Allied Tactical Publication
ATGLANT/ATGPAC - Afloat Training Group Atlantic/Pacific Fleets
AUX - Auxiliary Machinery Room
AUXs - Auxiliary Machinery Rooms
AW - Air Warfare
AWS - AEGIS Weapon System

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BA - Billets Authorized
BCU - Bridge Control Unit
BDA - Battle Damage Assessment
BEQ - Bachelor Enlisted Quarters
BFT - Battle Force Tactical Train(er/ing)
BG - Battle Group
BIU or B1U - Block I (1) Upgrade
BPD - Basic Point Defense; Beach Party Division
BS&W - Bottom Sediment and Water
BT - Bulkhead Terminal
BTB - Bus Tie Breaker
BTU - British Thermal Unit
BUPERS - Bureau of Naval Personnel
BUPERSINST - Bureau of Naval Personnel Instruction
BW - Biological Warfare
BWPT - Bilge Water Processing Tank

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C2 - Command and Control
C2I - Command and Control, and Intelligence
C2W - Command and Control Warfare
C2WC - Command and Control Warfare Commander
C3 - Command, Control, and Communications
C3I - Command, Control, Communications, and Intelligence
C4 - Command, Control, Communications, and Computers
C4I - Command, Control, Communications, Computers and Intelligence
C4ISR - Command, Control, Communications, computers, Intelligence, Surveillance, and Reconnaissance
C&D - Command and Decision
CAAC - Counseling and Assistance Center
CANTRAC - Catalog of Navy Training Courses
CAP - Command Advancement Program
CART - Command Assessment of Readiness and Training
CAPT - Captain
CAS - Close Air Support
CASREP - Casualty Report
CAT - Command Assessment Team
CATF - Commander, Amphibious Task Force
CATV - Community Antenna Television
CBR - Chemical, Biological, and Radiological
CCA - Craft Collection Area (for amphibious operations)
CCDG - Commander, Cruiser Destroyer Group
CCOL - Compartment Check-Off List
CCG - Cartesian Coordinate Grid; Commander, Carrier group
CCIR - Commander's Critical Information Requirements
CCOI - Critical contact of interest
CCP - Craft Collection Point (for amphibious landing craft operations)
CCS - Central Control Station (combined shipboard engineering and damage control station)
CDO - Command Duty Officer
CEC - Cooperative Engagement Capability
CFFZ - Call for Fire Zone
CFL - Command Fitness Leader
cfm - cubic feet per minute
CHAPGRU - Cargo Handling and Port Group
CHT - Collection Holding Tank
CHT - Collection, Holding, and Transfer
CHOP - Change Operational Control
CI - Counterintelligence
CIB - Combined Information Bureau
CIC - Combat Information Center
CICWO - Combat Information Center Watch Officer
CICWS - Combat Information Center Watch Supervisor
CINC - Commander of a Combatant Command; Command in Chief
CINCLANTFLT - Commander in Chief Atlantic Fleet
CINCPACFLT - Commander in Chief Pacific Fleet
CINCUSNAVEUR - Commander in Chief United States Naval Forces Europe
CINTEX - Combined Inport Tactical Exercise
CIWS - Close-In Weapons System (20mm Vulcan Phalanx gun)
CJCS - Chairman of the Joint Chiefs of Staff
CJCSI - CJCS Instruction
CJTF - Command, Joint Task Force
CLF - Commander, Landing Force
CLZ - Craft Landing Zone
CMAA - Chief Master-At-Arms
CMC - Command Master Chief
CMEO - Command Managed Equal Opportunity
CMO - Civil-Military Operations
CMOZ - Civil-Military Operations Center
CMP - Class Maintenance Plan
CMS - COMSEC Material System
CMSA - Cruise Missile Support Activity
CMWD - Countermeasure Washdown System
CMTQ - Cruise Missile Tactical Qualification
CNA - Center for Naval Analysis
CNET - Chief of Naval Education and Training
CNO - Chief of Naval Operations
CNP - Chief of Naval Personnel
CO - Commanding Officer
CO - Carbon Monoxide
CO - Commanding Officer
COA - Course of Action
COMMO - Communications Officer
COCOM - Combatant Command (command authority)
COMMZ - Communications Zone
COMNAVSURFLANT - Commander, Naval Surface Force Atlantic Fleet
COMPTUEX - Competitive Training Exercises
COMSEC - Communications Security
CONPLAN - Concept Plan
CONREP - Connected Replenishment
CONSOL - Consolidation of Cargo Between Replenishment Ships
CONUS - Continental United States
COOP - Craft of Opportunity (mine warfare)
COSAL - Coordinated Shipboard Allowance List
CO2 - Carbon Dioxide
CPG - Command Amphibious Group
CPO - Chief Petty Officer
CPOs - Chief Petty Officers
CPO - Chemical Protective Overgarment
CPP - Controllable Pitch Propeller
CPR - Cardiopulmonary Resuscitation
CQ - Carrier Qualification
C5RA - Combat Systems, Command, Control, Communications and Computer Readiness Assessment
CRA - Communications Readiness Assessment
CRAT - Communications Readiness Assist Team
CRC - CONUS Replacement Center
CRC - Communication Readiness Certification
CREWCERT - Crew Certification
CRITIC - CRIT Intelligence Communication
CRP - Controllable Reversible Pitch or Propeller
CRYPTO - Cryptographic Material
CSAR - Combat Search and Rescue
CSARB - Child Sexual Assault Review Board
CS - Combat Support
CSC - Combat Systems Coordinator
CSC - Computer Software Configuration
CSIS - Combat Systems IC Switchboard
CSMC - Combat Systems Maintenance Central
CSMP - Current Ship's Maintenance Project
CSS - Combat Service Support
CSOP - Combat Systems Operational Preparation
CSSQT - Combat Systems Ship Qualification Trials
CSTG - Combat Systems Training Group
CSTT - Combat System Training Team
CSTOM - Combat Systems Technical Operations Manuals
CSMP - Current Ship Maintenance Project
CT - Casualty Terminals
CTT - Command Training Team
CTAPS - Contingency TACS Automated Planning System
CUDIXS - Common User Digital Information exchange System
CW - Chemical Warfare; Continuous Wave
CWC - Composite Warfare Commander
CWO - Chief Warrant Officer
CV - Aircraft Carrier
CVBG - Aircraft Carrier Battle Group

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dB - decibels
DANTES - Defense Activity for Nontraditional Educational Support
DAAR - Drug and Alcohol Abuse Report
DACT - Defense Air Combat Training; Dissimilar Air Combat Training
DAO - Defense Attaché Office
DAPA - Drug and Alcohol Program Advisor
DAS - Deep Air Support
DASS - Defensive Aids Sub System
DAWIA - Defense Acquisition Workforce Improvement Act
DB - Dry Bulb
DC - Damage Control
DC - Direct Current
DCA - Damage Control Assistant
DCC - Damage Control Central
DCC - Damage Control Console
DCII - Defense Clearance and Investigation Indexes
DCO - Damage Control Officer (generally the Engineer Officer by billet)
DCPO - Damage Control Petty Officer
DCTT - Damage Control Training Team
DFM - Diesel Fuel, Marine
DH - Department Head
DISA - Defense Information Systems Agency
DIVO - Division Officer
DLA - Defense Logistics Agency
DLI - Deck Launched Intercept
DLR - Depot Level Repairable
DLS - Decoy Launching System
DMR - Defense Management Review
DNA - Defense Nuclear Agency
DOD - Department of Defense
DON - Department of the Navy
DONCAF - Department of Navy Central Adjudication Facility
DORA - Diving Operational Readiness Assessment
DOS - Department of State
DPC - Data Processing Center
DSC - Deep Sound Channel
DSL - Deep Scattering Layer
DSOT - Daily System Operability Test
DSV - Deep Sound Velocity; Deep Submergence Vehicle
DTE - Detect-to-Engage
DTG - Date Time Group
DTS - Data Terminal Set
DUI - Driving under the influence

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EA - Electronic Attack
ECC - Engineering Control Console
ECCTT - Engineering Casualty Control Training Team
EDG - Emergency Diesel Generator
EDO - Engineering Duty Officer
EDORM - Engineering Department Organization and Regulation Manual
EDVR - Enlisted Distribution and Verification Report
EDVRMAN - Enlisted Distribution Verification Report Users Manual
EEI - Essential Elements of Information
EEOB - Electronic Enemy Order of Battle
EEBD - Emergency Escape Breathing Device
EEBDs - Emergency Escape Breathing Devices
EGL - Equipment Guide List
EHF - Extremely High Frequency
EIB - Electronic Information Bulletins
ELF - Extremely Low Frequency
EM - Electromagnetic
EMBT - Emergency Main Ballast Tank
EMCON - Emission Control
EMI - Extra Military Instruction
EMO - Electronics Material Officer
EMP - Electromagnetic Pulse
EMPSKED - Employment Schedule
EOD - Explosive Ordnance Disposal
EOP - Engineering Operational Procedures
EOCC - Engineering Operational Casualty Control
EOSS - Engineering Operational Sequencing System (system configuration and alignment)
EOOW - Engineering Officer of the Watch
EO - Equal Opportunity
EOOW - Engineering Officer of the Watch
EMRM - Equipment Maintenance Related Material
ENTNAC - Entrance National Agency Check
EOT - Engine Order Telegraph
EP - Electronic Protection
EPCC - Electric Plant Control Console
EPCPU - Electric Plant Central Processing Unit
EPMAC - Enlisted Placement Management Center
EPW - Enemy Prisoners of War
E-QUAL - Engineering Qualification
ER - Engine Room
ERs - Engine Rooms
ERO - Electronics Repair Officer
ES - Electronic Support; Electronic Surveillance
ESO - Educational Services Officer
ESSM - Evolved Sea Sparrow Missile
ETG - Engineering Training Group
EVAL - Evaluation Report
EW - Electronic Warfare
EWARP - Emergency Water-Activated Repair Patch
EW-EX - Electronic Warfare Exercise
EWS - Electronic Warfare Support
EXCOP - Exciter Control Panel
EXCOPs - Exciter Control Panels

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F - Fahrenheit
FAD - Fighter Air Director (direction); Fleet Air Defense
FADIZ - Fleet Air Defense Advisory Zone
FAST - Fleet Air Superiority Training; Fleet Antiterrorist Security Team; Floating At-Sea Target
FCLP - Field Carrier Landing Practice
FCO - Fire Control Officer
FC - Electronic Field Change
FC - Fire Control
FEBA - Forward Edge of Battle Area
FEF - Federal Executive Fellowship
FEMA - Federal Emergency Management Agency
FEP - Final Evaluation Period
FEZ - Fighter Engagement Zone
FFE - Firefighter's Ensemble
F/O - Fuel Oil
FIR - Flow-Induced Resonance
FIST - Fleet Imagery Support Terminal
FITREP - Fitness Report
FLEETEX - Fleet Exercise
FLIR - Forward-looking infrared
FLOT - Forward Line of Own Troops
FLTBCST - Fleet Broadcast
FLTCINC - Fleet Commander in Chief
FLTSEVOCOM - Fleet Service Voice Communication
FOD - Foreign Object Damage or Debris
FOM(NFM) - Figure of Merit
FOP - Fuel Oil Purifier
FORACS - Fleet Operational Readiness Accuracy Checksite
FOTC - Force Over-the-Horizon Track Coordinator
FOTS - Fuel Oil Transfer System
FPPWP - First Preplanned Waypoint
FSCC - Fuel System Control Console
FSCL - Fire Support Coordination line
FSC - Family Service Center
FSEE - Free Standing Electronic Enclosure
FSO - Fleet Support Operations
FSS - Fast Sealift Ships
FTA - Fleet Technical Assist
FTG - Fleet Training Group
FTSCLANT - Fleet Technical Support Center Atlantic
FTSC - Fleet Technical Support Center
FTSCPAC - Fleet Technical Support Centers Pacific
FWC - Force Weapons Coordinator
FXP - Fleet Exercise Publication

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GB - Generator Breaker
GCCS - Global Command and Control System
GCB - Generator Circuit Breaker
GDP - Gross Domestic Product
GENSIT - General Situation
GG - Gas Generator
GHZ - Gigahertz
gpm - gallons per minute
GQ - General Quarters
GMFCS - Guided Missile Fire Control System
GMLS - Guided Missile Launching System
GMT - General Military Training
GNFPP - Global Naval Force Presence Policy
GPETE - General Purpose Electronic Test Equipment
GPS - Global Positioning System
GRU - Grid Reference Unit
GTE - Gas Turbine Engine
GTG - Gas Turbine Generator
GTGs - Gas Turbine Generators
GTM - Gas Turbine Main
GTM - Gas Turbine Module
GTN - Global Transportation Network

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HATS - Helicopter/Hovering Attack Torpedo System
HAZMINCEN - Hazardous material Minimization Center
HC - Hearing Conservation
HCA - Humanitarian and Civic Assistance
HCO - Helicopter Control Officer
HEPA - High Efficiency Particulate Air
HERF - Hazards Of Electromagnetic Radiation To Fuel
HERP - Hazards Of Electromagnetic Radiation To Personnel
HF - High Frequency
HFDF - High Frequency Direction Finding
HFDF Red - Maritime Enemy Force Alert Message - HFDF
HIFR - Helicopter In-Flight Refueling
HM - Hazardous Material
HM or HAZMAT - Hazardous Material
HMIS - Hazardous Material Information System
HMTIS - Hazardous Material Turned Into Store
HMUG - Hazardous Material User's Guide
HM/HW - Hazardous Material/Hazardous Waste
HM&E - Hull, Mechanical and Electrical Equipment
HNS - Host-Nation Support
HOPM - Hydraulic Oil Power Module
HOTAS - Hands On Throttle and Stick
HP - High Pressure
HPT - High Payoff Targets
HPAC - High Pressure Air Compressor
HPAD - High Pressure Air Dehydrator
HS - Home Station
HULTEC - Hull-to-emitter correlation
HUMEVAC - Humanitarian Emergency Evacuation
HUMINT - Human Intelligence
HVU - High Value Unit
HWS - Harpoon Weapon System
Hz - Hertz
H2S - Hydrogen Sulfide

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"I" Division - Indoctrination Division
IAR - Individual Accomplishments Report
IAW - In Accordance With
IC - Interior Communication
ICCP - Impressed Current Cathodic Protection
ICSS - Integrated Combat Systems Switchboard
IDLH - Immediately Dangerous to Life or Health
IEC - Integrated Electronic Console
IEM - Inactive Equipment Maintenance
IFDL - In-Flight Data Link
IGVs - Inlet Guide Vanes
IFF - Identify Friend or Foe
IFVG - Integrated Fluid Variable Gear
IMAV - Intermediate Maintenance Availability
IMA - Intermediate Maintenance Activity
IMINT - Imagery Intelligence
IMO - International Maritime Organization
INCSEA - Incident at Sea
INFOSEC - Information Security
INSURVV - Board of Inspection and Survey
IPB - Intelligence Preparation of the Battlefield
IR - Intelligence Requirements; Infrared
IRS - Informal Resolution System
IRST - Infrared Search and Track
ISAR - Inverse Synthetic Aperture Radar
ISEA - In Service Engineering Agent
ITC - Integrated Throttle Control
ITP - Index of Technical Publications
ITT - Integrated Training Team
IUC - Immediate Unit Commander
IUM - In-Use Material
IUC/ISIC - Immediate Superior In Command
IUSS - Integrated Undersea Surveillance System
IUW - Inshore Undersea Warfare
IVCS - Integrated Voice Communications System

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JAG - Judge Advocate General
JAGMAN - Manual of the Judge Advocate General
JC2WC - Joint Command and Control Warfare Center
JEMP - Joint Exercise Management Program
JEZ - Joint Engagement Zone
JFACC - Joint Force Air Component Commander
JFC - Joint Force Commander
JFFC - Joint Force Fires Coordinator
JFI - Joint Force Integrator
JFITL - Joint Force Integrator Task List
JIB - Joint Information Bureau
JLOTS - Joint Logistics Over-the-Shore
JMCC - Joint Maritime Component Commander
JMCIS - Joint Maritime Command Information system
JMEM - Joint Munitions Effectiveness manuals
JMET - Joint Mission Essential Task
JMETL - Joint Mission Essential Task List
JOA - Joint Operations Area
JOCC - Joint Operational Command Center
JOPES - Joint Operation Planning and Execution System
JP - Jet Propulsion
JP - Joint Publication
JSCP - Joint Strategic Capabilities Plan
JSRC - Joint Search and Rescue Center
JSN - Job Sequence Number
JSTARS - Joint Strategic Targeting and Ranging Systems
JTCB - Joint Targeting Coordination Board
JTIDS - Joint Tactical Information Display
JTMP - Joint Training Master Plan
JTTP - Joint Tactics, Techniques, and Procedures
JULLES - Joint Universal Lessons Learned System
JWCA - Joint Warfighting Capabilities Assessment

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KHZ - Kilohertz
KW - Kilowatt

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LAMPS - Light Airborne Multi-Purpose System (AN/SH-60 helicopter)
LANTIRN - Low-Altitude Navigation and Targeting Infrared for Night
LC - Load Center
LCAC - Landing Craft Air Cushion
LCB - Load Center Breaker
LCs - Load Centers
LCDR - Lieutenant Commander
LCPO - Leading Chief Petty Officer
LCP - Local Control Panel
LCS - LCAC Control Ship
LCU - Landing Craft - Utility
LDO/CWO - Limited Duty Officer/Chief Warrant Officer
LEAs - Law Enforcement Agencies
LEDET - Law Enforcement Detachment
LF - Low Frequency
LIMDIS - LIMited DIStribution
LMA - Logistics Management Assessment
LMS - Link Monitor System
L/O - Lube Oil
LOC - Lines of Communication
LOCOP - Local Control Panel
LOCOPs - Local Control Operating Panels
LOEP - List of Effective Pages
LOGREQ - Logistics Requirement reports
LON - Letter of Notification
LOP - Lube Oil Purifier
LOP - Local Operating Panel
LOSCA - Lube Oil Storage and Conditioning Assembly
LOSCAs - Lube Oil Storage and Conditioning Assemblies
LOT - Letter of Transmittal
LP - Low Pressure
LPAC - Low Pressure Air Compressor
LPAD - Low Pressure Air Dehydrator
LPO - Leading Petty Officer
LPZ - Limited Protection Zone
LPZs - Limited Protection Zones
LRC - Lesser Regional Contingency
LRC - Local Record Check
LSE - Landing Signalman - Enlisted
LSP - Lube Oil Supply Pressure
LT - Lieutenant
LTA - Local Training Authority
LTJG - Lieutenant Junior Grade
LTT - Limited Team Trainers
LU - Lay Up
LVA - Low-Visibility Approach

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3-M - Maintenance, Material, and Management
M Division Officer - Machinery Division Officer
ma - milli-amps
MAA - Master-At-Arms
MACHALTS - Machinery Alterations
MAGTF - Marine Air Ground Task Force
MARG - Marine Amphibious Ready Group
MARREP - Maritime report
MAM - Maintenance Assist Modules
MBT - Manual Bus Transfer
MCM - Manual for Courts-Martial
MCPOC - Master Chief Petty Officer of the Command
MCS - Machinery Control System
MDS - Maintenance Data System
MDR - Medical Department Representative
MEDEVAC - MEDical EVACuation
MEF - Marine Expeditionary Force
MER - Main Engine Room
MERSHIP - Merchant Ship
METL - Mission Essential Task List
METOC - Meteorological/Oceanographic
MEU - Mission Essential Unit; Marine Expeditionary Unity
MEU(SOC) - Marine Expeditionary Unit (Special Operation Capable)
MEZ - Missile Engagement Zone
MF - Medium Frequency
MFC - Main Fuel Control
MFD - Multi Function Display (CRT)
MGIB - Montgomery GI Bill
MIB - Mishap Investigation Board
MILDEC - Military Deception
MIP - Maintenance Index Page
MIR - Mishap Investigation Report
MIW - Mine Warfare
MIZ - Marginal Ice Zone; Missile Intercept Zone
MG - Motor/Generator
MLOC - Master Light-Off Checks
MOB-DC/E/N/S - Mobility (exercises) Damage Control/Engineering/Navigation/Seamanship
MOMAG - Mobile Mine Assembly Group
MOOTW - Military Operations Other Than War
MOVREP - Movement report
MPA - Manpower Authorization
MPAC - Medium Pressure Air Compressor
MPDE - Main Propulsion Diesel Engine
MPE/S - Maritime Prepositioned Equipment and Supplies
MPE - Maximum Permissible Exposure
MR - Mishap Report
MR - Maintenance Required
MRC - Maintenance Requirement Card
MRC - Movement Report Center
MRC - Major Regional Contingency
MRG - Main Reduction Gear
MS - Mobilization Station
MSC - Military Sealift Command
MSGCHANGEREP - Message Change Report
MSI - Modified Surf Index
MSO - Ocean Going Minesweeper (according to MILBRATS)
MTBSP - Mobilization Troop Basis Stationing Plan
MTI - Moving Target Indicator
MTR - Mandatory Turn-In for Repair
MULTOTS - Multiple Unit Link-Test and Operational Training System

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NAC - National Agency Check
NACIC - Navy Absentee Collection and Information Center
NACLC - National Agency Check with Local Agencies and Credit Checks
NAIA - Navy Ammunition Inventory Accuracy Program
NAS - Naval Air Station
NATO - North Atlantic Treaty Organization
NAVADMIN - Naval Administrative
NAVAIR - Naval Air
NAVCAMS - Naval Communication Area Master Station
NAVELEX - Naval Electronics Center
NAVELEX - Naval Electronic Systems Command
NAVOSHENVTRACEN - Naval Occupational Safety and Health and Environmental Training Center
NAVOSH - Naval Occupational Safety and Health
NAVPERS - Naval Personnel
NAVPERSCOM - Navy Personnel Command
NAVSEA - Naval Sea Systems Command
NAVSEASYSCOM - Naval Sea Systems Command
NAVSAFECEN - Navy Safety Center
NAVSUP - Naval Supply Systems Command
NBC - Nuclear, Biological, and Chemical
NBPS - No Break Power Supply
NBPSs - No Break Power Supplies
NCA - National Command Authority
NCCOSC - Naval Command, Control and Ocean Surveillance Center
NCIS - Naval Criminal Investigative Service
NCMP - Navy Capabilities and Mobilization Plan
NCO - Non-Combatant Operations
NCTAMS - Naval Computer and Telecommunications Area Master Station
NCTR - Non-Cooperative Target Recognition
NCTS - Naval Computer and Telecommunications Station
NEC - Navy Enlisted Classification
NETPDTC - Naval Education and Training Professional Development and Technology Center
NFTI - Naval Firefighter's Thermal Imager
NEF - Naval Expeditionary Force
NEO - Non-Combatant Evacuation Operation
NFPA - National Fire Protection Association
NGG - Gas Generator Speed
NGO - Non-Governmental Organization
NIIP - Navy Instructional Input Program
NJP - Non-Judicial Punishment
NLLDB - Navy Lessons Learned Database
NLLS - Navy Lessons Learned System
NM - Nautical Miles
NMCS - Nation Military Command System
NMP - Navy Manning Plan
NMS - National Military Strategy
NOB - Not Observed
NOBC - Navy Officer Billet Classification
NOPF - Naval Oceanographic Processing Facility
NORAD - North American Aerospace Defense Command
No. - Number
NPC - Naval Personnel Command
NPT - Power Turbine Speed
NRC - National Response Center
NR&R - Navy Rights and Responsibilities
NSFS - Naval Surface Fire Support
NSSM - NATO Sea Sparrow Missile
NSTM - Naval Ships' Technical Manual
NTCS-A - Navy Tactical Command System-Afloat
NTDS - Naval Tactical Data System
NTFS - Navy Training Feedback System
NTIC-A - Navy Tactical Information Compendium Series A
NTP - Navy Tactical Publication
NWP - Naval Warfare Publication
NWPL - Naval Warfare Publication Library

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OA - Operational Area
OBA - Oxygen Breathing Apparatus
OBRP - Onboard Repair Parts
OBT TCD - On-board Trainer, Trainer Control Device
OCA - Operational Control Authority; Offensive Air
OCE - Officer Conducting (officer in charge of) the Exercise
OCONUS - Outside Continental United States
OCSOT - Overall Combat System Operability Test
OCM - Oil Content Monitor
OD - Oil Distribution
ODC - Officer Data Card
ODCR - Officer Distribution and Control Report
ODVR - Officer Distribution Verification Report
OGC - Optimum Generator Combination Chart
OHS - Oil/Hazardous Substance
OIC - Officer in Charge
OJT - On-the-Job Training
OLA - Office of Legislative Affairs
OMB - Office of Management and Budget
OMFTS - Operational Maneuver from the Sea
OOD - Officer Of the Deck
OPM - Office of Personal Management
OPCON - Operational Control
OPLAN - Operational Plan
OPNAVINST - Office of the Chief of Naval Operations Instruction
OPREP - Operational Report
OPSKED - Operating Schedule
OPSEC - Operations Security
OPTAR - Operating Target Funds
OPTESTED - Operationally Tested
OPTEVFOR - Operational Test and Evaluation (Force)
ORM - Operational Risk Management
ORDALTS - Ordnance Alterations
ORM - Operational Risk Management
O/S - Over-the-Side
OSD - Office of the Secretary of Defense
OSINT - Open-Source Intelligence
OSR - Officer Summary Record
OT - Operational Test
OTC - Officer-in Tactical Command
OTCIXS - Officer-in Tactical Command Information eXchange System
OTCIXSVZ - Officer-in-Tactical Command Information Exchange System
OTH - Over the Horizon
OTH-T - Over the Horizon Targeting
OTHSR - Optimum track ship routing
OWHT - Oily Waste Holding Tank
OWS - Oily Water Separator
OVHL - Overhaul

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PAA - Primary Aircraft Authorization
PACE - Program for Afloat College Education
PACC - Propulsion and Auxiliary Control Console
PAG - Public Affairs Guidance
PAL - Publication Allowance List
PAR - Program Assessment Review
PARs - Personnel Advancement Requirements
PBIL - Pushbutton Indicator Light Panel
PBFT - Planning Board for Training
PC - Personal Computer
PCS - Primary Control Ship (Amphibious landing craft operations)
PCS - Permanent Change of Station
PCV - Pressure Control Valve
PCVT - Personnel, Vehicles, Cargo and Time (amphibious operations - combat cargo tracking term)
PDR - Periscope Depth Range; Periscope Detection Radar; Predicted Detection Range, Precision Approach Radar
PECU - Portable Exothermic Cutting Unit
PEETE - Portable Electrical/Electronic Test Equipment
PERSTEMPO - Personal Tempo
PFA - Physical Fitness Assessment
PHARS - Portable Hydraulic Access/Rescue System
PHEL - Physiological Heat Exposure Limit
PIO - Preliminary Inquiry Officer
PI - Preliminary Inquiry
PIR - Priority Intelligence Requirements
PKP - Purple-K-Powder
PLA - Power Lever Angle
PLARA - Power Lever Angle Rotary Actuator
PLCC - Propulsion Local Control Console
PM - Periodic Maintenance
PMA - Permanent Magnet Alternator
PMAs - Permanent Magnet Alternators
PMC - Partial mission capable
PMCF - Plst-Maintenace Check Flight
PMI - Prevention of Mutual Interference
PMS - Planned Maintenance System
PMS MR - Preventive Maintenance System Maintenance Request
PN - Personnelman
PO3 - Petty Officer Third Class
POD - Plan of the Day
POD - Ports of Debarkation
POE - Ports of Embarkation
POM - Program Objective Memorandum
POIC - Petty Officer-In-Charge
POM - Preparation for Overseas Movement
POOW - Petty Officer of the Watch
POSSUB - Possible Submarine
POW - Prisoner of War
PPE - Personnel Protective Equipment
PPM - Parts Per Million
PQS - Personnel Qualification Standard
PPBS - Planning, Programming, and Budgeting System
PR - Periodic Reinvestigation
PRC - Progressive Repair Concept
PRF - Pulse Repetition Frequency
PRR - Pulse Repetition Rate
PRP - Personnel Reliability Program
PRMAR - Primary Mission Area
PRT - Physical Readiness Test
PSI - Pound per Square Inch
PSI - Personnel Security Investigation
PSIA - Pound per Square Inch Absolute
PSID - Pound per Square Inch Differential
PSIG - Pound per Square Inch Gauge
PSR - Performance Summary Record
PSYOPS - Psychological operations
PT - Physical Training
PT - Power Turbine
PTO - Power Takeoff
PTSR - Post-Mobilization Training and Support Requirement
PU - Participating Unit
PUB - Publication
PTR - Pressure Temperature Relationship
PVO - Private Voluntary Organization
PW - Potable Water
PW - Pulse Width
PZ - Protection Zone
PZs - Protection Zones

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QAWTDs - Quick Acting Watertight Doors

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RA - Repair Activity
RAC - Risk Assessment Code
RADAR - RAdio Direction And Ranging
RADHAZ - Electromagnetic Radiation Hazards
RAM - Rolling Airframe Missile
RAST - Recovery Assist Spotting and Traverse system associated with ships configured for LAMPS MK III helicopters
RATT - Radio Teletype
RBOC - Rapid bloom off-board
RC - Reserve Component
RCS - Radar Cross Section
RCU - Reserve Component Unit
RDT&E - Research, Development, Test, and Evaluation
REFTR/RFT - Refresher Training
RICER - Radar, IFF & CIC Equipment Room
RIMSS - Redundant Independent Mechanical Starting System
ROCs - Required Operational Capabilities
ROE - Rules of Engagement
ROTC - Reserve Officer Training Corps
RSG TDO - Readiness Support Group Type Desk Officer
RSOI - Reception, Staging, Onward Movement, and Integration
RT - Riser Terminal
RTB - Return To Base
RTM - Rate Training Manual

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SA - The 'A' section of a switchboard
SA - Seaman Apprentice
SAC - Scene-of-Action Commander, Supporting Arms Coordinator, Senior Air Coordinator
SAC(A) - Supporting Aims Coordinator (airborne)
SAG - Surface Action Group
SALVRTE - Salvage Training and Readiness Evaluation
SAM - Surface-to-Air-Missile
SAR - Search and Rescue
SB - The 'B' section of a switchboard
SBI - Special Background Investigation
SBTT - Schedule shipboard training team
SC - The 'C' section of a switchboard
SCC - Ship Control Console
SCC - Sea Combat Commander
SCU - Shaft Control Unit
SCBA - Self-Contained Breathing Apparatus
SCLSIS - Ship Configuration and Logistic Support Information System (pronounced "SKEL-SIS")
SCO - Secret Control Officer
SDK - Skin Decontamination Kit
SECDEF - Secretary of Defense
SECNAV - Secretary of the Navy
SECNAVINST - Secretary of Navy Instruction
SEED - Supplemental Emergency Escape Device
SEF - Ship's Equipment File
SERE - Survival, Evacuation, Resistance, and Escape
SERT - Ship's Electronic Readiness Team
SESEF - Shipboard Electronic Systems Evaluation Facility
SEWC - Space and Electronic Warfare Commander
SF - Special Frequency (400 Hz) switchboard
SG - The generator control section of a switchboard
SGS - Ship's Gridlock System
SHIPALTS - Ship Alterations
SHML - Ship's Hazardous Material List
SHML - Shipboard Hazardous Material List
SIB - Ship's Information Book
SIGNET - Signal Intelligence
SIMA - Shore Intermediate Maintenance Activity
SINS - Ships Inertial Navigation System
SITREP - SITuation REPort
SIOP - Single Integrated Operation Plan
SLAM - Stand-off Land Attack Missile
SLAMEX - Sea Launched Attack Missile Exercise
SM - Standard Missile
SMD - Ship Manning/Manpower Document
SMDR - Senior medical department representative
SN - Seaman
SNAP - Shipboard Non-Tactical Automated Data Processing Program
SNOK - Standard Notes for the Oil King
SO - Safety Observer
SOA - Speed of Advance
SOA - Statement of Awareness
SOF - Special Operations Force
SOFA - Status of Forces Agreement
SOP - Standard Operating Procedure
SOPA - Senior Officer Present Afloat
SORTS - Status Of Resources and Training System report
SOT - System Operability Test
SOPV - Solenoid-Operated Pilot Valve
SORM - Standard Organization and Regulations Manual
SPCMCA - Special Court-Martial Convening Authority
SPECAT - SPEcial CATegory
SPETE - Special Purpose Electronic Test Equipment
SPETERL - Ship's Portable Electronic Test Equipment Requirements List
SPR - Secret Periodic Reinvestigation
SRA - Selected Restricted Availability
SRBOC - Super Rapid Blooming Off-Board Chaff
SRQ - Service Request
SS - Submarine Service
SSBI - Single Scope Background Investigation
SSDG - Ship Service Diesel Generator
SSGTG - Ship Service Gas Turbine Generator (Same as GTG)
SSGTGs - Ship Service Gas Turbine Generators (Same as GTG)
SSRNM - Surface Ship Radiated Noise Measurement
SSM - Survival, Evasion, Resistance, and Escape
SSN - Social Security Number
SSS - Start/Stop Sequencing
SSS - Synchronous Self Shifting
SSTG - Ship Service Turbine Generator
STBY - Standby
STC - Static Frequency Converter (or Changer)
STCs - Static Frequency Converters (or Changers)
STK - Strike Control
STS - Significant-Threshold Shift
STW - Strike Warfare
SU - Start Up
SURFLANT - Surface Forces Atlantic
SURFORTRAMAN - Surface Force Training Manual
SURFPAC - Surface Forces Pacific
SUW - Surface Warfare Exercise
SUW - Surface Warfare
SUWC - Surface Warfare Commander
SVTT - Surface Vessel Torpedo Tube
SW - Seawater
SWBD - Switchboard
SWBDs - Switchboards
SWC - Ship's Weapons Coordinator
SWDG - Surface Warfare Development Group
SWO - Surface Warfare Officer
SWTW - Surface Warfare Training Week
SYSCOM - Systems Commanders

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T5.4 - Power Turbine Inlet Temperature
TAC - Tactical Advanced Computer
TACAN - Tactical Air Communication And Navigation
TACON - Tactical Control
TAC D&E - Tactical Development and Evaluation Program
TACELINT - Tactical Electronics Intelligence Report
TACMEMO - Tactical Memorandum
TACTAS - TACtical Towed Array Sonar
TAD - Temporary Additional Duty
TAD - Tanker Airborne Droge; Tactical Air Direction (net); Tactical Air Directory; Theater Air Defense
TADIL - TActical Data Information Link
TADIXS - Tactical Data Information eXchange System
TAMPS - Tactical Air Mission Planning System
TAO - Tactical Action Officer
TARPS - Tactical Airborne Reconnaissance Pod System
TASS - Towed Array Surveillance System
TDC - Top Dead Center
TDT - Target Designator Transmitter
TECHINT - Technical Intelligence
TECHMAN - Technical manuals
TEMADD - Temporary Additional Duty
TEMADDINS - Temporary Additional Duty Under Instruction
TEP - Temperature Extreme Pressure
TEPP - Tomahawk Employment Planning Package
TEWS - Tactical Early Warning System
TFCC - Tactical Flag Command Center
THADD - Theater High Altitude Air Defense Missile
TIC - Tactical Information Coordinator
TIC - Throttle Input Command
TICON - Tight CONtrol
TGL - Tag Guide List
TLAM-C - Tomahawk Maritime Unit Land Attack Missile Conventional
TLAM-D - Tomahawk Land-Attack Missile-Submunitions (conventional submissions)
TLAM-N - Tomahawk Land-Attack Missile-Nuclear
TMA - Target Motion Analysis
TMD - Theater Missile Defense
TMDER - Technical Manual Deficiency Evaluation Report
TNT - Trinitrotoluene
TOA - Time of arrival
TOD - Time of Delivery; Time of Departure
TOE - Table of Organization and Equipment
TOH - Time Overhead
TOI - Target of Intention; Target of Interest
TOJ - Track on Jam
TOL - Time of Launch
TOO - Target(s) of Opportunity
TORS - Tag Out Record Sheet
TPE - Transfer, Pumpout, and Evacuation
TPFDD - Time-Phased Force and Deployment Data
TPFDL - Time-Phased Force Deployment List
TRAP - Tactical Recovery of Aircraft and Personnel; Threat Research and Analysis Program TTP tactics, techniques, and procedures
TRMS - TYCOM Readiness Management System
TQL - Total Quality Leadership
TREE - Transient Radiation Effects on Electronics
TRXs - Training Exercises
TPZ - Total Protection Zone
TPZs - Total Protection Zones
TSSEs - Total Ship Survivability Exercises
TSTA - Tailored Ship Training Availability
TUM - Tag-Out Users Manual
TYCOM - Type Commander
TYCOMs - Type Commanders
TYCOM TRXs - Type Commander Required Exercises
TYCOMALT - Type Commander Alterations
TXV - Thermostatic Expansion Valve

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UA - Unauthorized absence
UAR - Unconventional Assisted Recovery
UAV - Unmanned Aerial Vehicle
UBIC - Underwater Battery IC Switchboard
UCCR - Uninhibited Chemical Chain Reaction
UCMJ - Uniform Code of Military Justice
UCP - Unified Command Plan
UEC - Universal Engine Controller
UHF - Ultra-High Frequency
UIC - Unit Identification Code
UJTL - Universal Joint Task List
UL - Underwriters Laboratory
ULF - Ultra-Low Frequency
UMI - Underway Material Inspection
UN - United Nations
UNAFF - Unified Action Armed Forces
UNREP - Underway Replenishment
UPB - Unit Punishment Book
UPS - Uninterruptible Power Supply
USAID - United States Agency for International Development
USIA - United States Information Agency
USR'S - Unit Status Reports
USACOM - US Atlantic Command
USARPAC - US Army Pacific
USCG - United States Coast Guard
USCINCEUR - US Commander in Chief, Europe
USCINCSOC - Commander in Chief, US Special Operations Command
USMTF - Uniformed Services Medical Treatment Facility
USPACOM - US Pacific Command
USTRANSCOM - US Transportation Command
USCINCTRANS - Commander in Chief, US Transportation Command
USSSPACECOM - US Space Command
USW - Warfare Exercise Units
USW - Undersea Warfare
USWC - Undersea Warfare Commander
UTM - Universal Transverse Mercator

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VA - Veterans Administration
VAC - volts alternating current
VCNO - Vice Chief of Naval Operations
VCR - Videocassette recorder
VDC - volts direct current
VERTREP - VERTical REPlenishment
VHF - Very High Frequency
VLF - Very Low Frequency
VLS - Vertical Launch System
VSBSS - Visit, Search, Boarding, Salvage and Seizure
VSVs - Variable Stator Vanes

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WASP - Wide Area Surface Picture
WCO - Weapons Control Officer
WCS - Work Center Supervisor
WCS - Weapons Control System
WBGT - Wet-Bulb-Globe Temperature
WIFCOM - Wire-Free Communication
WMD - Weapons of Mass Destruction
WSF - Weapon System File
WSM - Water Space Management; Weapons System Manager
WTDs - Watertight Doors
WWMCCS - Worldwide Military Command and Control System

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XO - Executive Officer
XOI - Executive Officer's Inquiry

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YN - Yeoman

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ZEDS - Zonal Electrical Distribution System

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