Glossary / list of aviation abbreviations
Here you can find some abbreviations & terms in common use. All trademarks or product names mentioned herein are the property of their respective owners.
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| Abbrev. | Description |
|---|---|
| A-G | Air to Ground |
| A/C | Aircraft |
| A/l | Anti-ice |
| A/P | Autopilot |
| A/T | Autothrottle |
| AA/A-A | Air to Air |
| AAA | Anti Aircraft Artillery |
| AAATS | Australian Advanced Air Traffic Services |
| AAC | Aeronautical Administration Communication |
| AAC | Army Air Corps |
| AAM | Air to Air Missile |
| AAR | Air to Air Refueling |
| AAS | Advanced Automation System |
| AATT | Advanced Aviation Transportation Technology |
| AB | Afterburner |
| AB | Air Base |
| ACA | Agile Combat Aircraft |
| ACARS | Aircraft Communications Addressing and Reporting System |
| ACARS | ARINC communications and address reporting system |
| ACAS | Airborne Collision and Avoidance System |
| ACC | Air Combat Command |
| ACF | Area Control Facility |
| ACFS | Advanced Concepts Flight Simulator |
| ACK | Acknowledge |
| ACMS | Aircraft Condition Monitoring System |
| ACT | Active |
| AD | Air Defence |
| AD | Airworthiness Directive |
| ADATS | Air Defence Anti Tank System |
| ADC | Air Data Computer |
| ADF | Automatic Direction Finder |
| ADGB | Air Defence of Great Britain |
| ADI | Attitude Director lndicator |
| ADLP | Aircraft Data Link Processor |
| ADMA | Aviation Distributors and Manufactureres Association |
| ADO | Approved Design Organisation |
| ADS | Automatic Dependent Surveillance |
| AECB | Atomic Energy Control Board |
| AERA | Automated Enroute ATC |
| AEW | Airborne Early Warning |
| AFB | Air Force Base |
| AFCENT | Air Forces Central (Europe) |
| AFCS | Automatic Flight Control System |
| AFDS | Autopilot Flight Director System |
| AFNORTH | Air Forces North (Europe) |
| AFR | Africa (region) |
| AFS | Automatic Flight System |
| AFSOUTH | Air Forces South (Europe) |
| AFTN | Aeronautical Fixed Telecommunication Network |
| AGATE | Advanced General Aviation Transport Experiments |
| AGL | Above Ground Level |
| AGM | Air to Ground Missile |
| AGNA | Advisory Group of National Authorities |
| AHRS | Attitude Heading Reference System |
| AI | Artificial Intelligence |
| AIM | Air Intercept Missile |
| AIP | Aeronautical Information Publication |
| AIRS | Advanced Infrared Sounder |
| AL | Allegheny |
| ALARM | Air Launched Anti-Radiation Missile |
| ALBM | Air Launched Ballistic Missile |
| ALCM | Air Launched Cruise Missile |
| ALPA | Air Line Pilots Association |
| ALT | Alternate |
| ALT | Altitude |
| ALT HOLD | Altitude Hold Mode |
| ALTN | Alternate |
| AM | Amplitude Modulation |
| AMC | Acceptable Means of Compliance |
| AMO | Approved Maintenance Organisation |
| AMOSS | Airline Maintenance and Operation Support System |
| AMRAAM | Advanced Medium Range Air to Air Missile |
| AMSS | Aeronautical Mobile Satellite Service |
| ANG | Air National Guard |
| ANP | Actual Navigation Performance |
| ANP | Air Navigation Plan |
| AOA | Airport Operations Area |
| AOA | Angle-of-Attack |
| AOC | Aeronautical Operation Control |
| AOC | Air Operator Certificate |
| AOCS | Attitude and Orbit Control System |
| AOG | Aircraft On Ground |
| AOM | Aircraft Operating Manual |
| AOPA | Aircraft Owners and Pilots Association |
| AP | Armor Piercing |
| APA | Allied Pilots Association |
| APC | Aeronautical Passenger Communication |
| APMS | Automated Performance Measurement System |
| APO | Approved Production Organisation |
| APPR | Approach/Approach Mode |
| APRT | Airport |
| APU | Auxiliary Power Unit |
| AQP | Advanced Qualification Program |
| ARAC | Aviation Rulemaking Advisory Committee |
| ARC | Airworthiness Review Certificate |
| ARINC | Aeronautical Radio Incorporated |
| ARM | Anti Radiation Missile |
| ARPA | Advanced Research Projects Agency |
| ARR | Arrival |
| ARTCC | Air Route Traffic Control Center |
| ARTS | Automated Radar Terminal System |
| ASCII | American Standard Code for Information Interchange |
| ASI | Air Speed Indicator |
| ASM | Air to Surface Missile |
| ASM | Anti Submarine Missile |
| ASR | Airport Surveillance Radar |
| ASRAAM | Advanced Short Range Air to Air Missile |
| ASRS | Aviation Safety Reporting System |
| ASTOR | Airborne Stand-Off Radar |
| ASW | Anti Submarine Warfare |
| ATA | Actual Time of Arrival |
| ATA | Air Transport Association |
| ATC | Air Traffic Control |
| ATCS | Advanced Train Control Systems |
| ATCSCC | Air Traffic Control System Command Center |
| ATHR | Autothrust System |
| ATIS | Automatic Terminal Information Service |
| ATM | Air Traffic Management |
| ATN | Aeronautical Telecommunications Network |
| ATPL | Airline Transport Pilot Licence |
| ATS | Automatic Throttle System |
| ATSC | Air Traffic Service Communications |
| AVAIL | Available |
| AVHRR | Advanced Very High-Resolution Radiometer |
| AWACS | Airborne Warning And Control System |
| AWAS | Automated Weather Advisory Station |
| AWIPS | Advanced Weather Interactive Processing System |
| AWO | All Weather Operations |
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| Abbrev. | Description |
|---|---|
| BAC | British Aircraft Company |
| BAe | British Aerospace |
| BALPA | British Air Line Pilots Association |
| BASIS | British Airways Safety Information System |
| BEA | Bureau d’Enquêtes Accidents (French equivalent of NTSB) |
| BFU | Bundesstelle für Flugunfalluntersuchung (German equivalent of NTSB) |
| BIT(E) | Built-ln-Test (Equipment) |
| BMEWS | Ballistic Missile Early Warning System |
| BMVg | German Ministry of Defense (Bundesministerium der Verteidigung) |
| BRG | Bearing |
| BRT | Brightness |
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| Abbrev. | Description |
|---|---|
| C | Centigrade |
| CAA | Civil Aviation Authority (Great Britain) |
| CAAC | Civil Aviation Authority of China |
| CAB | Civil Aeronautics Board |
| CAME | Continuous Airworthiness Maintenance Exposition |
| CAP | Combat Air Patrol |
| CAS | Calibrated (Computed) Air Speed |
| CAS | Close Air Support (tactical) |
| CASA | Construcciones Aeronáuticas S.A. (Part of EADS) |
| CASE | Computer Aided Software Engineering |
| CAT | Clear Air Turbulence |
| CAT | Computer Aided Testing |
| CBT | Computer Based Training |
| CBU | Cluster Bomb Unit |
| CDI | Course Deviation Indicator |
| CDTI | Cockpit Display of Traffic Information |
| CDU | Control display unit |
| CFIT | Controlled Flight Into Terrain |
| CG | Center of Gravity |
| CGS | Centimeter-gram-second |
| CIT | Compressor Inlet Temperature |
| Cl | Cost Index |
| CLB | Climb Detent of the Thrust Levers |
| CLR | Clear |
| CMC | Central Maintenance Computer |
| CNS | Communications, Navigation and Surveillance |
| CNS/ATM | Communications, Navigation and Surveillance / Air Traffic Management |
| CofA | Certificate of Airworthiness |
| CofAE | Certificate of Airworthiness for Export |
| COM | Cockpit Operating Manual |
| COM | Communication |
| CON | Continuous |
| COTR | Contracting Officer's Technical Representative |
| COTS | Commercial Off The Shelf |
| CP | Control Panel |
| CPCS | Cabin Pressure Control System |
| CPDLC | Controller Pilot Datalink Communications |
| CPL | Commercial Pilot Licence |
| CPU | Central Processing Unit |
| CRC | Cyclic Redundancy Check |
| CRM | Cockpit Resource Management |
| CRM | Crew Resource Management |
| CRS | Certificate of Release to Service |
| CRS | Course |
| CRT | Cathode Ray Tube |
| CRZ | Cruise |
| CSD | Constant Speed Drive |
| CTA | Control Area (ICAO Term) |
| CTA | Controlled-Time of Arrival |
| CTAS | Center TRACON Automation System |
| CTC | Centralized Train Central |
| CTOL | Conventional Take Off and Landing |
| CTR | (Aerodrome) Control Zone |
| CTR | Center |
| CTR | Civil Tilt Rotor |
| CTRL | Control |
| CWS | Control Wheel Steering |
| CWY | Clearway |
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| Abbrev. | Description |
|---|---|
| D | Derated |
| D-TO Nl | Derated Takeoff Engine Fan Speed |
| D/D | Drift Down |
| DA | Descent Advisor |
| DADC | Digital Air Data Computer |
| DATALINK | Digitized Information Transfer (air/ground) |
| db | decibel (acoustic measurement unit) |
| DBS | Direct Broadcast Satellite |
| DC | Direct Current Electricity |
| DCT | Direct (route) |
| DE-TO PR | Derated Takeoff Engine Pressure Ratio |
| DECR | Decrement |
| DEL | Delete |
| DEP | Departure |
| DES | Descent |
| DEST | Destination |
| DEV | Deviation |
| DFDAU | Digital Flight Data Acquisition Unit |
| DFDR | Digital Flight Data Recorder |
| DFGS/C | Digital Flight Guidance System/Computer |
| DGAC | Civil Aviation Authority France |
| DGPS | Differential GPS |
| DH | Decision Height |
| DIR | Direct |
| DIR/INTC | Direct Intercept |
| DIS | Distance |
| DISCR | Discrepancy |
| DIST | Distance |
| DLIR | Downward Looking InfraRed |
| DLR | German Aerospace Research Establishment (Deutsches Zentrum für Luft- und Raumfahrt) |
| DME | Distance Measuring Equipment |
| DMU | Data Management Unit |
| DNTKFX | DownTrack Fix |
| DOD | Department of Defense |
| DOT | Department of Transportation |
| DRU | Data Retrival Unit |
| DTG | Distance-to-go |
| DZ | Drop Zone |
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| Abbrev. | Description |
|---|---|
| E | East |
| E/D | End-of-Descent |
| E/O | Engine-Out |
| EADI | Electronic Attitude Director Indicator |
| EADS | European Aeronautic Defence and Space Company |
| EAS | Equivalent Airspeed |
| EASA | European Aviation Safety Agency |
| EC | European Commission |
| ECAM | Electronic Centralized Aircraft Monitor |
| ECM | Electronic Counter Measures |
| ECON | Economy |
| ECS | Environmental Control System |
| EEC | Electronic Engine Control |
| EFC | Expected Further Clearance |
| EFIS | Electronic Flight Instrument System |
| EGT | Exhaust Gas Temperature |
| EHSI | Electronic Horizontal Situation Indicator |
| EICAS | Engine Indicating and Crew Alerting System |
| EIU | Electronic Interface Unit |
| ELT | Emergency Locator Transmitter |
| EMP | Electromagnetic Pulse |
| EMS | Emergency Medical Services |
| ENG | Engine |
| EPA | European Part Approval |
| EPR | Engine Pressure Ratio |
| EPROM | Erasable Programmable Read-Only Memory |
| ESM | Electronic Support Measures |
| EST | Estimated |
| ETA | EstimatedTime of Arrival |
| ETSO | European Technical Standard Order |
| ETSOa | European Technical Standard Order authorisation |
| ETX | End of Transmission |
| EU | European Union |
| EUR | Europe (region) |
| EW | Electronic Warfare |
| EW | Radar Early Warning Radar |
| EXEC | Execute |
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| Abbrev. | Description |
|---|---|
| F | Fahrenheit |
| F/D (FD) | Flight Director |
| FA | Final Approach |
| FAA | Federal Aviation Administration |
| FAC | Forward Air Controller |
| FADEC | Full Authority Digital Engine Control |
| FAF | Final Approach Fix |
| FANS | Future Air Navigation System |
| FAR | Federal Acquisition Regulation |
| FAR | Federal Aviation Regulations |
| FARP | Forward Air Refuelling Point |
| FAST | Final Approach Spacing Tool |
| FBO | Fixed Based Operator |
| FBW | Fly by Wire |
| FCC | Flight Control Computer |
| FCL | Flight Crew Licensing |
| FCU | Flight Control Unit |
| FDAMS | Flight Data Acquisition and Management System |
| FDC | Flight Data Company |
| FDR | Flight Data Recorder |
| FEATS | Future European Air Traffic System |
| FF | Fuel Flow |
| FGS/C | Flight Guidance System/Computer |
| FIR | Flight Information Region |
| Fix | Position in space usually on aircraft's flight plan |
| FL | Flight Level |
| FLCH | Flight Level Change |
| FLIDRAS | Flight Data Replay and Analysis System |
| FLIR | Forward looking InfraRed |
| FLT | Flight |
| FMA | Flight Mode Annunciator |
| FMC | Flight Management Computer |
| FMGC | Flight Management Guidance Computer |
| FMGS | Flight Management Guidance System |
| FMS | Flight Management System |
| FO | First officer |
| FOD | Foreign Object Damage |
| FOQA | Flight Operations Quality Assurance |
| FPA | Flight Path Angle |
| FPA | Focal Plane Array |
| FPM | Feet Per Minute |
| FQIS | Fuel Quantity Indicating System |
| FR | From |
| FRA | Flap Retraction Altitude |
| FREQ | Frequency |
| FSF | Flight Safety Foundation |
| FT | Feet |
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| Abbrev. | Description |
|---|---|
| G/S | Glideslope |
| GA | General Aviation |
| GA | Go-Around |
| GAF | German Air Force (Luftwaffe) |
| GAR | Go-Around |
| GAT | General Aviation Terminal |
| GCA | Ground-controlled Approach |
| GDLP | Ground Data Link Processor |
| GE | General Electric |
| GHz | Gigahertz |
| GLLD | Ground Laser Locator Designator |
| GM | Guidance Material |
| GMT | Greenwich MeanTime |
| GNSS | Global Navigation Satellite System |
| GPS | Global Positioning System |
| GPU | Ground Power Unit |
| GPWS | Ground Proximity Warning System |
| GRAF | Ground Replay and Analysis Facility |
| GRP | Geographical Reference Points |
| GS | Glide Slope |
| GS | Ground Speed |
| GSFC | Goddard Space Flight Center |
| GW | Gross Weight |
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| Abbrev. | Description |
|---|---|
| HAC | Hughes Aircraft Co. |
| HAI | Helicopter Association International |
| HARM | High Speed Anti Radiation Missile |
| HAS | Hardened Aircraft Shelter |
| HBARO | Barometric Altitude |
| HDG | Heading |
| HDG SEL | Heading Select |
| HDOT | Inertial Vertical Speed |
| HE | Altitude Error |
| HF | High Frequency |
| HIRS | High-Resolution Infrared Sounder |
| Hl | High |
| HMS | Her Majesty´s Ship |
| HP | Holding Pattern |
| hp | Horse Power (0.7456999 kw) |
| HPRES | Pressure Altitude |
| HSI | Horizontal Situation Indicator |
| HUD | Head-Up Display |
| HUMS | Health and Usage Monitoring Systems |
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| Abbrev. | Description |
|---|---|
| IA | Inspection Authorization |
| IAOA | Indicated Angle-of-Attack |
| IAS | Indicated Air Speed |
| ICAAS | Integrated Control in Avionics for Air Superiority |
| ICAO | International Civil Aviation Organization |
| ID | Identifier |
| IDENT | Identification |
| IEPR | Integrated Engine Pressure Ratio |
| IF | Intermediate Frequency |
| IFR | Instrument Flight Rules |
| IFRB | International Frequency Registration Board |
| IGFET | Insulated Gate Field Effect Transistor |
| ILS | Instrument Landing System |
| IMC | Instrument Meteorological Conditions |
| in.hg. | inches of mercury |
| INBD | Inbound |
| INFO | Information |
| INIT | Initialization |
| INR | Image Navigation and Registration |
| INS | Inertial Navigation System |
| INTC | Intercept |
| IPC | Illustrated Parts Catalogue |
| IPT | Integrated Product Team |
| IR | Infrared |
| IRD | InfraRed Decoy |
| IRS | Inertial Reference System |
| IRU | Inertial Reference Unit |
| ISA | International Standard Atmosphere |
| ISO | International Standards Organization |
| ITU | International Telecommunications Union |
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| Abbrev. | Description |
|---|---|
| JAA | Joint Aviation Authorities |
| JaboG | German Fighter Bomber Wing (Jagdbombergeschwader) |
| JAR | Joint Aviation Requirements |
| JATO | Jet Assisted Takeoff |
| JG | German Fighter Wing (Jagdgeschwader) |
| JSRA | Joint Sponsored Research Agreement |
| JSTARS | Joint Surveillance Target Attack Radar System |
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| Abbrev. | Description |
|---|---|
| KG | Kilogram |
| kHz | kilohertz |
| KIAS | Knots Indicated Air Speed |
| km | Kilometer |
| KT (kts) | Knots (nautical miles/ hour) |
| KTAS | Knots True Air Speed |
| kW | Kilowatt |
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| Abbrev. | Description |
|---|---|
| L | Left |
| LANTRIN | Low Altitude Navigation and Targeting InfraRed Night |
| LAT | Latitude |
| LBA | Luftfahrtbundesamt (German Civial Aviation Authority) |
| LCN | Local Communications Network. |
| LDGPS | Local DGPS |
| LFR | Low-frequency Radio Range |
| LGB | Laser Guided Bomb |
| LIM | Limit |
| LMM | Compass locator at the middle marker |
| LNAV | Lateral Navigation |
| LO | Low |
| LOC | Localizer Beam |
| LOE | Line Oriented Evaluation |
| LOFT | Line Oriented Flight Training |
| LOM | Compass Locator at the Outer Marker |
| LON | Longitude |
| LORAN | Long Range Navigation |
| LOS | Line-Oriented Simulation |
| LRC | Long Range Cruise |
| LRU | Line Replaceable Unit |
| LTG | German Air Transport Wing (Lufttransportgeschwader) |
| LVL CHG | Level Change |
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| Abbrev. | Description |
|---|---|
| M | Mach Number |
| M/ASI | Mach/Airspeed Indicator |
| MAA | Maximum Authorized IFR Altitude |
| MAC | Mid-Air Collision |
| MAG | Magnetic |
| MAINT | Maintenance |
| MAN | Manual |
| MAP | Missed Approach Point |
| MAR | March |
| MAW | Missile Approach Warning |
| MAX | Maximum |
| MAX CLB | Maximum engine thrust for two-engine climb |
| MAX CRZ | Maximum engine thrust for two-engine cruise |
| MCA | Minimum Crossing Altitude |
| MCDU | Multipurpose Control Display Unit |
| MCL | Multi Crew License |
| MCP | Mode Control Panel |
| MCT | Maximum Continuous Thrust |
| MCW | Modulated Continuous Wave |
| MDA | Minimum Descent Altitude |
| MDL | Multipurpose Data Link |
| MEA | Minimum Enroute Altitude |
| MEL | Minimum Equipment List |
| MET | Meterological |
| MIDAS | Multi-discipline Data Analysis System |
| Mile | (engl. Mile = 1,60933 km) |
| MILSPEC | Military Specifications |
| MIN | Minimum |
| MIN | Minutes |
| MLA | Maneuver Load Alleviation |
| MLA | ManeuverLimited Altitude |
| MLE | Landing Gear Extended Placard Mach Number |
| MLS | Microwave Landing System |
| MMEL | Master Minimum Equipment List |
| MMO | Mach Max Operating |
| MMS | Missile Management System |
| MN | Magnetic North |
| MNPS | Minimum Navigation Performance Specification |
| MOA | Memorandum of Agreement |
| MOCA | Minimum Obstruction Clearance Altitude |
| MoD | Ministry of Defence |
| MOD | Modified/Modification |
| MODIS | Moderate-resolution Imaging Spectrometer |
| MOE | Maintenance Organisation Exposition |
| Mph | Miles per hour |
| MRA | Minimum Reception Altitude |
| MRCA | Multi Role Combat Aircraft |
| MRM | Medium Range Missile |
| MRT | Multi Role Transporter |
| MRTT | Multi Role Transport Tanker |
| MSG | Message |
| MSL | Mean Sea Level |
| MTBF | Mean Time Between Failures |
| MTO(A) | Maintenance Training Organisation (Approval) |
| MU | Management Unit |
| MWP | Meteorological Weather Processor |
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| Abbrev. | Description |
|---|---|
| N | North |
| N/A | Not Applicable |
| NACA | National Advisory Committee for Aeronautics |
| NAS | National Aircraft Standard |
| NAS | National Airspace System |
| NASA | National Aeronautics and Space Administration |
| NAT | North Atlantic (region) |
| NATCA | National Air Traffic Controllers Association |
| NATO | North Atlantic Treaty Organisation |
| NAV | Navigation |
| NAVAID | Navigational Aid |
| NBAA | National Business Aircraft Association |
| ND | Navigation Display |
| NDB | Non-directional Radio Beacon |
| NESDIS | National Environmental Satellite, Data, and Information Service |
| NGATM | New Generation Air Traffic Manager |
| Nl | Engine Revolutions per Minute (percent) |
| NLM | Network Loadable Module |
| NLR | National Research Laboratory (The Netherlands) |
| NM | Nautical Mile (1,85335 km) |
| NMC | National Meteorological Center |
| NOAA | National Oceanic and Atmospheric Administration |
| NOTAM | Notice for Airmen |
| NRP | National Route Program |
| NTSB | National Transportation Safety Board |
| NV / NVE | Night Vision, Equipment |
| NWS | National Weather Service |
| NWS | Nose Wheel Steering |
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| Abbrev. | Description |
|---|---|
| O-QAR | Optical Quick Access Recorder |
| OAG | Official Airline Guide |
| OAT | Outside AirTemperature |
| OATS | Orbit and Attitude Tracking |
| OBTEX | Offboard Targeting Experiments |
| ODAPS | Operational OGE Data Acquisition and Patch Subsystem |
| OEM | Original Equipement Manufacturer |
| OFST | Lateral Offset Active Light |
| OGE | Operational Ground Equipment |
| OIS | OGE Input Simulator |
| OP | Operational |
| Ops | Operations |
| OPT | Optimum |
| OTFP | Operational Traffic Flow Planning |
| OTR | Operational Turn Round |
| OV | Overseas National Airways |
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| Abbrev. | Description |
|---|---|
| P | Procedure-Required Tuned NAVAID |
| PAR | Precision Approach Radar |
| PAWES | Performance Assessment and Workload Evaluation |
| PBD | Place Bearing/Distance (way point) |
| PD | Profile Descent |
| PDB | Performance Data Base |
| PDC | Pre Departure Clearance |
| PERF | Performance |
| PF | Pilot Flying |
| PFD | Primary Flight Display |
| PGB | Precision Guided Bomb |
| PHARE | Program for Harmonized ATC Research in Europe |
| PHIBUF | Performance Buffet Limit |
| PHINOM | Nominal Bank Angle |
| PIREPS | Pilot Reports |
| PMS | Performance Management System |
| PND | Primary Navigation Display |
| PNF | Pilot non-flying |
| POS | Position |
| POS INIT | Position Initialization |
| POS REF | Position Reference |
| PPI | Plan Position Indicator |
| PPL | Private Pilot Licence |
| PPOS | Present Position |
| PREV | Previous |
| PROC | Procedure |
| PROF | Profile |
| PROG | Progress Page on MCDU |
| PROV | Provisional |
| PT | Total Pressure |
| PTH | Path |
| PVD | Plan View Display |
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| Abbrev. | Description |
|---|---|
| QAR | Quick Access Recorder |
| QFE | Atmospheric pressure reduced to airport or runway elevation |
| QNH | Atmospheric pressure to sea level |
| QRH | Quick Reference Handbook |
| QTY | Quantity |
| QUAD | Quadrant |
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| Abbrev. | Description |
|---|---|
| R | Right |
| R/C | Rate of Climb |
| RAAF | Royal Australian Air Force |
| RAD | Radial |
| RAD | Radio |
| RADAR | Radio Detection And Ranging |
| RAF | Royal Air Force |
| RAPS | Recovery Access Presentation System |
| RASCAL | Rotorcraft Air Crew Systems Concepts Airborne Laboratory |
| RCAF | Royal Canadian Air Force |
| RCP | Radio Control Panel |
| RCS | Radar Cross Section |
| RDP | Radar Data Processing (system) |
| RECCE | Reconnaissance |
| REF | Reference |
| REQ | Request |
| REQ | Required/Requirement |
| RESTR | Restriction |
| RESYNCING | Resynchronizing |
| rf | radio frequency |
| RFC | Royal Flying Corps |
| RHAW | Radar Homing And Warning |
| RHWR | Radar Homing Warning Receiver |
| RI | Radar Image |
| RMPs | Radio Management Panels |
| RN | Royal Navy |
| RNAF | Royal Netherlands Air Force (Koninklijke Luchtmacht) |
| RNAV | Area Navigation |
| RNP | Required Navigation Performance |
| RPM | Revolutions Per Minute |
| RTA | Required Time of Arrival |
| RTCA | Radio Technical Committee on Aeronautics |
| RTE | Route |
| RVR | Runway Visual Range |
| RW | Runway |
| RWY | Runway |
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| Abbrev. | Description |
|---|---|
| S | South |
| S/A | Strike / Attack |
| S/C | Step Climb |
| SA | Semi Active |
| SA | Situation Awareness |
| SACEUR | Supreme Allied Comander Europe |
| SAM | Surface to Air Missile |
| SAR | Search And Rescue |
| SARP | ICAO Standards and Recommended Practices |
| SAT | Static Air Temperature |
| SATCOM | Satellite Communications |
| SBIR | Small Business Innovative Research |
| SEL | Selected |
| SESMA | Special Event Search and Master Analysis |
| shp | Shaft Horse Power |
| SID | Standard Instrument Departure |
| SIGMET | Significant Meteorological Information |
| SITA | Société Internationale Télécommunique Aéronautique |
| SLAR | Side Looking Airborne Radar |
| SLIR | Side Looking Infra Red |
| SOP | Standard Operating Procedure |
| SOPA | Standard Operating Procedure Amplified |
| SP | Space |
| SPD | Speed Mode |
| SPS | Sensor Processing Subsystem |
| Sqn | Squadron |
| SRP | Selected Reference Point |
| SSFDR | Solid-State Flight Data Recorder |
| SSM | Sign Status Matrix |
| STAB | Stabilizer |
| STAR | StandardTerminal Arrival Route |
| STC | Supplemental Type Certificate |
| STEPCLB | StepClimb |
| STOL | Short Takeoff and Landing |
| STTR | Small Business Technology Transfer Resources |
| SUA | Special Use Airspace |
| SWAP | Severe Weather Avoidance Program |
| SWY | Stopway |
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| Abbrev. | Description |
|---|---|
| T/C (TOC) | Top-of-Climb |
| T/D (TOD) | Top of-Descent |
| T/O (TO) | Takeoff |
| TACAN | Tactical Air Navigation |
| TACH | Tachometer |
| TAI | Thermal Anti-lce |
| TAP | Terminal Area Productivity |
| TAS | True Air Speed |
| TAT | Total AirTemperature |
| TATCA | Terminal Air Traffic Control Automaiton |
| TAWS | Terrain Awareness and Warning System |
| TBA | To Be Advised |
| TBD | To Be Determined |
| TBO | Time between Overhauls |
| TBS | To Be Specified |
| TC | Type Certificate |
| TCA | Terminal Control Area |
| TCAS | Traffic Alert & Collision Avoidance System |
| TCDS | Type Certificate Data Sheet |
| TDWR | Terminal Doppler Weather Radar |
| TEMP | Temperature |
| TFM | Traffic Flow Management |
| TFR | Terrain Folowing Radar |
| TGT | Target |
| THDG | True Heading |
| THR | Thrust |
| THR HOLD | Throttle Hold |
| TIAS | True Indicated Airspeed |
| TKE | TrackAngle Error |
| TMA | Traffic Management Advisor |
| TMC | Thrust Management Computer |
| TMF | Thrust Management Function |
| TMU | Traffic Management Unit |
| TN | True North |
| TO EPR | Takeoff Engine Pressure Ratio |
| TO Nl | Takeoff Engine Fan Speed |
| TOD | Top of Descent |
| TOGA | Takeoff/Go-Around |
| TOT | Total |
| TRA | Thrust Reduction Altitude |
| TRACON | Terminal Radar Approach Control Facility. |
| TRANS | Transition |
| TRK | Track (to a NAVAID) |
| TRU | True |
| TSO | Technical Standard Order |
| TSRV | Transport Systems Research Facility |
| TT | Total Temperature |
| TURB | Turbulence |
| TWY | Taxiway |
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| Abbrev. | Description |
|---|---|
| UAV | Unmanned Aerial Vehicle |
| UHF | Ultra-high Frequency |
| USAF | United States Air Force |
| USAFE | United States Air Force Europe |
| USMC | United States Marine Corps |
| USN | United States Navy |
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| Abbrev. | Description |
|---|---|
| V | Velocity |
| V/S | Vertical Speed/Vertical |
| V/STOL | Vertical/Short Take Off and Landing |
| V/TRK | Vertical Track |
| V2 | Takeoff Climb Velocity |
| VA | Design Maneuvering Speed |
| VA | Heading to an Altitude |
| VAR | Variation |
| VAR | Visual-aural Radio Range |
| VAR | Volt-amps Reactive |
| VASI | Visual Approach Slope Indicator |
| VC | Design Cruising Speed |
| VCMAX | Active Maximum Control Speed |
| VCMIN | Active Minimum Control Speed |
| VD | Design Diving Speed |
| VD | Heading to a DME distance |
| VF | Design Flap Speed |
| VFE | Flaps Extended Placard Speed |
| VFR | Visual Flight Rules |
| VFXR(R) | Flap Retraction Speed |
| VFXR(X) | Flap Extension Speed |
| VG | Ground Velocity |
| VGND | Ground Velocity |
| VH | Maximum Level-flight Speed with Continuous Power |
| VHF | Very-high Frequency |
| VHRR | Very High-Resolution Radiometer |
| VISSR | Visible Infrared Spin Scan Radiometer |
| Vl | Critical Engine Failure Velocity (Takeoff Decision Speed) |
| Vl | Heading to a course intercept |
| VLA | Very Light Aeroplane |
| VLE | Landing Gear Extended Placard Airspeed |
| VLO | Maximum Landing Gear of Operating Speed |
| VLOF | Lift-off Speed |
| VLR | Very Light Rotorcraft |
| Vls | Lowest Selectable Airspeed |
| VM | Heading to a manual termination |
| VM(LO) | Minimum Maneuver Speed |
| VMAX | Basic Clean Aircraft Maximum CAS |
| VMC | Minimum Control Speed with Critical Engine Out |
| VMC | Visual Meteorological Conditions |
| VMIN | Basic Clean Aircraft Minimum CAS |
| VMO | Velocity Max Operating |
| VNAV | Vertical Navigation |
| VNE | Velocity Never Exceed |
| VNO | Maximum Structural Cruising Speed |
| VOM | Volt-ohm-milliammeter |
| VOR | VHF OmniRange Navigatgion System |
| VORTAC | VHF Omni Range Radio/Tactical Air Navagation |
| VPATH | Vertical Path |
| VR | Heading to a radial |
| VR | Takeoff Rotation Velocity |
| VREF | Reference Velocity |
| VS | Design Speed for Maximum Gust Intensity |
| VSCS | Voice Switching and Control System |
| VSI | Stalling Speed in a Specified Flight Configuration |
| VSO | Stalling Speed in the Landing Configuration |
| VTK | Vertical Track Distance |
| VTOL | Vertical Takeoff and Landing |
| VTR | Variable Takeoff Rating |
| VU | Utility Speed |
| VX | Speed for Best Angle of Climb |
| VY | Speed for Best Rate of Climb |
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| Abbrev. | Description |
|---|---|
| W | West |
| W/MOD | With Modification of Vertical Profile |
| W/STEP | With Step Change in Altitude |
| WAAS | Wide Area Augmentation System |
| WBC | Weight and Balance Computer |
| WINDMG | Wind Magnitude |
| WINDR | Wind Direction |
| WMSC | Weather Message Switching Center |
| WMSCR | Weather Message Switching Center Replacement |
| WPT | Way point |
| WT | Weight |
| WX | Weather |
| WXR | Weather Radar |
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| Abbrev. | Description |
|---|---|
| X-BAND | Frequency range between 8000 and 12500 MHz |
| XCVR | Transceiver |
| XFR | Transfer |
| XLTR | Translater |
| XM | External Master |
| XMIT | Transmit |
| XMITR | Transmitter |
| XPD | ATC Transponder (also XPDR, XPNDR, TPR) |
| XTK | Crosstrack (cross track error) |
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| Abbrev. | Description |
|---|---|
| YD | Yaw Damper |
| YSAS | Yaw Stability Augmentation System |
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| Abbrev. | Description |
|---|---|
| Z | Zulu (GMTtime) |
| ZFW | Zero Fuel Weight |
| ZNY | New York Air Route Traffic Control Center |
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