Abbreviations not included in ICAO Doc. 8400 are marked with an asterisk (*)
| A - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| ABN | Aerodrome beacon |
| ACARS | Aircraft Communication addressing and Reporting System |
| ACC | Area control centre or area control |
| ACFT | Acknowledge |
| ACT | Active or activated or activity |
| AD | Aerodrome |
| ADC | Aerodrome chart |
| ADF | Automatic direction-finding equipment |
| ADIZ | Air defence identification zone |
| AFIL | Flight plan filed in the air |
| AFIS | Aerodrome flight information service |
| AFS | Aeronautical fixed service |
| AFTN | Aeronautical fixed telecommunication network |
| A/G | Air-to-ground |
| AGL | Above ground level |
| AIC | Aeronautical Information Circular |
| AIM | Aeronautical Information Management |
| AIP | Aeronautical Information Publication |
| AIRMET | Information concerning en-route weather phenomena which may affect the safety of low-level aircraft operations |
| AIS | Aeronautical information services |
| ALRS | Alerting service |
| ALT | Altitude |
| ALTN | Alternate (aerodrome) |
| *AMC | Airspace management cell |
| AMDT | Amendment |
| *AMO | Aeronautical Meteorological Station |
| *AMS | Aeronautical Meteorological Station |
| AMSL | Above mean sea level |
| *ANA | Aeroportos de Portugal S.A. |
| *ANAC | Autoridade Nacional da Aviação Civil |
| ANC | Aeronautical chart (1:500 000) |
| ANS | Air Navigation Services |
| ANSP | Air Navigation Services Provider |
| AO | Aircraft Operator |
| *AOC | Air Operator Certificate |
| APCH | Approach |
| APP | Approach control office or approach control or approach control service |
| APR | April |
| APU | Auxiliary Power Unit |
| ARO | Air traffic services reporting office |
| ARP | Aerodrome reference point |
| ARR | Arrival ATS message designator |
| ASDA | Accelerate-stop distance available |
| ASPH | Asphalt |
| *AT | Customs |
| ATC | Air traffic control |
| *ATFCM | Air traffic flow and capacity management |
| *ATFMX | ATFCM exemption approved |
| ATIS | Automatic terminal information service |
| ATM | Air traffic management |
| ATS | Air traffic service |
| ATZ | Aerodrome traffic zone |
| AUG | August |
| AVBL | Available or availability |
| AVGAS | Aviation gasoline |
| B - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| B | Blue |
| BFR | Before |
| BLW | Below |
| BRG | Bearing |
| BTN | Between |
| *BYD | Beyond |
| C - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| C | Degrees Celsius (Centigrade) |
| *CA | Airforce Command |
| CAT | Category |
| *CFMU | Central Flow Management Unit |
| CHG | Modification ATS message designator |
| CIA | Aeronautical Information Circular (national) |
| CL | Centre line |
| CM | Centimetre |
| *CMA | Aeronautical Meteorological Centre |
| CNL | Cancel or cancelled |
| CNL | Cancellation ATS message designator |
| *CODE | ICAO Aircraft Address in form alphanumerical of six hexadecimal characters |
| COM | Communications |
| CONC | Concrete |
| CONS | Continuous |
| CPDLC | Controller-Pilot Data Link Communications |
| *CPVM | Meteorological Forecasting and Watching Centre |
| CS | Call sign |
| CTA | Control area |
| CTC | Contact |
| CTL | Control |
| CTR | Control zone |
| CWY | Clearway |
| D - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| D... | Danger area (followed by identification) |
| DCT | Direct (in relation to flight plan clearances and type of approach) |
| DEC | December |
| DEG | Degrees |
| DEP | Departure ATS message designator |
| DEST | Destination |
| DIST | Distance |
| DLA | Delay ATS message designator |
| DME | Distance measuring equipment |
| *DOC | Document |
| DOF | Date of Flight (YYMMDD) |
| DVOR | Doppler VOR |
| *DVORTAC | DVOR and TACAN Combination |
| E - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| E | East or eastern longitude |
| *EAD | European AIS Database |
| *EASA | European Union Aviation Safety Agency |
| *EEA | European Economic Area |
| EET | Estimated elapsed time |
| *EC | European Community |
| *ECAC | European Civil Aviation Conference |
| ELEV | Elevation |
| ELR | Extra long range |
| *EN | English |
| ENR | En-route |
| ENRC | En-route chart |
| EOBT | Estimated off-block time |
| EQPT | Equipment |
| EST | Estimate ATS message designator, estimated or estimation |
| ETA | Estimated time of arrival or estimating arrival |
| ETD | Estimated time of departure or estimating departure |
| ETO | Estimated time over significant point |
| *EU | European Union |
| *EUR | European Region |
| F - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| *FAP | Portuguese Air Force |
| FATO | Final approach and take-off area |
| FEB | February |
| *FFR | Fire Fighting and Rescue |
| *FFS | Fire Fighting Service |
| FIR | Flight information region |
| FIS | Flight information service |
| FL | Flight level |
| FLG | Flashing |
| FLTCK | Flight check |
| FM | From |
| FPL | Flight plan ATS message designator |
| FREQ | Frequency |
| FRI | Friday |
| FT | Foot or Feet (dimensional unit) |
| G - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| G | Green |
| GAMET | Area forecast for low-level flights |
| *GAT | General air traffic |
| GBAS | Ground Based Augmentation System |
| GEN | General |
| GEO | Geographic or true |
| GND | Ground |
| GNSS | Global navigation satellite system |
| *GPIAAF | Gabinete de Prevenção e Investigação de Acidentes com Aeronaves e de
Acidentes Ferroviários |
| GPS | Global positioning system |
| GUND | Geoid Undulation |
| H - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| *H | Hour |
| H24 | Continuous day and night service |
| *HAZMAT | Hazardous material |
| HEL | Helicopter |
| *HEMS | Hospital Emergency Medical Service |
| HF | High frequency [3 000 to 30 000 kHz] |
| HJ | Sunrise to sunset |
| HLDG | Holding |
| HLP | Heliport |
| HN | Sunset to sunrise |
| HO | Service available to meet operational requirements |
| HOL | Holiday |
| HOSP | Hospital aircraft |
| HPA | Hectopascal |
| HR | Hours |
| HS | Service available during hours of scheduled operations |
| HUM | Humanitarian |
| HX | No specific working hours |
| HZ | Hertz (cycle per second) |
| I - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| IAS | Indicated airspeed |
| *IATA | International Aviation Transport Association |
| IBN | Identification beacon |
| ICAO | International Civil Aviation Organisation |
| ID | Identifier or identify |
| *IFPS | Integrated initial flight plan processing system |
| IFR | Instrument flight rules |
| INOP | Inoperative |
| INS | Inertial navigation system |
| INTL | International |
| *IPMA | Instituto Português do Mar e Atmosfera |
| J - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| JAN | January |
| JUL | July |
| JUN | June |
| K - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| KG | Kilograms |
| KHZ | Kilohertz |
| KIAS | Knots indicated airspeed |
| KM | Kilometres |
| KT | Knots |
| L - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| L | Left (preceded by runway designation number to identify a parallel runway) |
| L | Locator (see LM, LO) |
| LAT | Latitude |
| LDA | Landing distance available |
| LDI | Landing direction indicator |
| LGT | Light or lighting |
| LIH | Light intensity high |
| LIL | Light intensity low |
| LIM | Light intensity medium |
| LM | Locator, middle |
| LMT | Local mean time |
| LO | Locator, outer |
| LONG | Longitude |
| LRG | Long range |
| M - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| M | Metres (preceded by figures) |
| MAG | Magnetic |
| MAR | March |
| MAX | Maximum |
| MAY | May |
| MCTA | Military Control Area |
| MCTR | Military Control Zone |
| MDA | Minimum descent altitude |
| *MEDEVAC | Medical evacuation |
| MEHT | Minimum, eye height over threshold (for visual approach slope indicator
systems) |
| MET | Meteorological or meteorology |
| METAR | Aerodrome routine meteorological report |
| MF | Medium frequency (300 to 3000 khz) |
| MHA | Minimum holding altitude |
| MHZ | Megahertz |
| MIL | Military |
| MIN | Minutes |
| *MLAT | Multilateration |
| MNM | Minimum |
| *MO | Meteorological office |
| MON | Monday |
| MSA | Minimum sector altitude |
| MSL | Mean sea level |
| *MT | Medium tension energy line |
| MTOM | Maximum take-off mass |
| *MTOW | Maximum take-off weight |
| *MVFR | VFR Manual |
| MWO | Meteorological Watch Office |
| N - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| N | North or northern latitude |
| NAT | North Atlantic Region |
| NAV | Navigation |
| NDB | Non-directional radio beacon |
| NE | North-east |
| NIL | None or I have nothing to send to you |
| NM | Nautical miles |
| NNE | North-north-east |
| NNW | North-north-west |
| NOF | International NOTAM office |
| NOTAM | A notice distributed by means of telecommunication containing information concerning the establishment, condition or change in any aeronautical facility, service, procedure or hazard, the timely knowledge of which is essential to personnel concerned with flight operations |
| NOV | November |
| NR | Number |
| *NS | Non-schedule |
| *NVO | Normal Visibility Operations |
| NW | North-west |
| NWB | North-westbound |
| O - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| OAC | Oceanic area control centre |
| OBST | Obstacle |
| OCA | Oceanic control area |
| OCH | Obstacle clearance height |
| OCT | October |
| OPMET | Operational meteorological information |
| OPR | Operator or operate or operative or operating or operational |
| OPS | Operations |
| OTR | Others |
| P - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| P... | Prohibited area (followed by identification) |
| PALS | Precision approach lighting system (specify category) |
| PANS | Procedures for Air navigation Services |
| PAPI | Precision approach path indicator |
| PAX | Passenger(s) |
| PCN | Pavement classification number |
| PERM | Permanent |
| PIB | Pre-flight information bulletin |
| PPR | Prior permission required |
| *PSP | Polícia de Segurança Pública |
| *PT | Portuguese language |
| Q - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| QFE | Atmospheric pressure at aerodrome elevation (or at runway threshold) |
| QNH | Altimeter sub-scale setting to obtain elevation when on the ground |
| R - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| R | Right (preceded by runway designation number to identify a parallel runway) |
| R | Red |
| R... | Restricted area (followed by identification) |
| R... | Radial from VOR (followed by identification) |
| RAC | Rules of the air and air traffic services |
| *RALT | Alternative Route |
| RCC | Search and Rescue coordination centre |
| RCF | Radio communication failure ATS message designator |
| RCL | Runway centre line |
| REG | Registration |
| REP | Report or reporting or reporting point |
| RESA | Runway end safety area |
| RMK | Remark |
| ROC | Rate of climb |
| RTE | Route |
| RTF | Radiotelephone |
| *RTIL | Runway Threshold Identification Lights |
| RVR | Runway visual range |
| RWY | Runway |
| S - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| S | South or southern latitude |
| SA | Sand |
| SALS | Simple approach lighting system |
| SAR | Search and rescue |
| SAT | Saturday |
| SBA | Aerodrome Brigade Service |
| SBAS | Satellite based augmentation system |
| *SBSLCI | Basic service of rescue and firefighting |
| SE | South-east |
| *SEA | Support Facilities Service |
| SEC | Seconds |
| SELCAL | Selective calling system |
| SEP | September |
| *SERA | Standardised European Rules of the Air |
| SFC | Surface |
| SIGMET | Information concerning en-route weather phenomena which may affect the safety of aircraft operations |
| *SIGWX | Significant weather |
| *SITA | Société Internationale des Telecommunications Aeronautiques |
| SPECI | Aerodrome special meteorological report |
| SR | Sunrise |
| SRR | Search and rescue region |
| SS | Sunset |
| SSE | South-south-east |
| SSR | Secondary surveillance radar |
| SSW | South-south-west |
| SUN | Sunday |
| SUP | Supplement |
| *SYNOP | Surface synoptic observations |
| SW | South-west |
| SWY | Stopway |
| T - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| T | Temperature |
| TACAN | UHF tactical air navigation aid |
| TAF | Aerodrome forecast |
| TCO | Third country operator |
| TDPM | Touchdown positioning marking |
| TDZ | Touchdown zone |
| TEL | Telephone |
| THR | Threshold |
| THU | Thursday |
| TKOF | Take-off |
| TLOF | Touchdown and lift-off area |
| TMA | Terminal control area |
| TODA | Take-off distance available |
| *TON | Tonne |
| TORA | Take-off run available |
| TRA | Temporary reserved airspace |
| *TRMZ | Transponder radio mandatory zone |
| TUE | Tuesday |
| TWR | Aerodrome control tower or aerodrome control |
| TWY | Taxiway |
| TYP | Type of aircraft |
| U - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| UFN | Until further notice |
| UHF | Ultra high frequency [300 to 3000MHz] |
| *UL | Runway for ultralight aircraft |
| ULM | Ultra Light motorized aircraft |
| UNL | Unlimited |
| UTC | Coordinated Universal Time |
| V - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| VAC | Visual approach chart |
| VALC | Visual approach and landing chart |
| *VAR | Magnetic variation |
| VASIS | Visual approach slope indicator systems |
| *VET | Veterinary |
| VFR | Visual flight rules |
| *VFRN | Night visual flight rules |
| VHF | Very high frequency (30 to 300 MHz) |
| VLR | Very long range |
| VMC | Visual meteorological conditions |
| VOLMET | Meteorological information for aircraft in flight |
| VOR | VHF omnidirectional radio range |
| VRB | Variable |
| VTOF | Visual take-off chart |
| W - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
| W | West or western longitude |
| W | White |
| WB | Westbound |
| WDI | Wind direction indicator |
| WED | Wednesday |
| WGS-84 | World Geodetic System - 1984 |
| WID | Width |
| WIP | Work in progress |
| WS | Wind shear |
| WSW | West-south-west |
| WT | Weight |
| Y - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z GLOSSARY OF TERMS |
|
|
| Y | Yellow |
|