A | A | Altitude in hundreds of feet. |
| AA | Approved Agency. |
| A/A | Air-to-Air. |
| AAD | Assigned Altitude Deviation |
| AAIM | Aicraft Autonomous Integrity Monitoring. |
| AAL | Above Aerodrome Level. |
| ABM | Abeam. |
| ABN | Aerodrome Beacon. |
| ACARS | Aircraft Communication Addressing and Reporting System. |
| ACAS | Airborne Collision Aviodance system. |
| ACC | Area Control Centre of Area Control. |
| ACCID | Notification of an aircraft accident. |
| ACFT | Airfract. |
| ACK | Acknowledge. |
| ACL | Altimeter Check Location. |
| ACN | Aircraft Classification number. |
| ACT | Active. |
| AD | Aerodrome. |
| ADA | Advisory Area. |
| ADC | Aerodrome chart. |
| ADNN | Additional |
| ADF | Automatic Direction Finder. |
| ADIZ | Air Defense Identification Number. |
| ADO | Aerodrome Office. |
| ADR | Advisory route. |
| ADS-B | Automatic Dependent Surveillance Broadcast. |
| ADS-C | Automatic Dependent Surveillance Contract. |
| ADSU | Automatic Dependent Surveillance Unit. |
| ADVS | Advisory Area. |
| AES | Aircraft Earth Station |
| AFIL | Flightplan Filed in the Air |
| AFIS | Aerodrome Flight Information Service. |
| AFISO | AFIS Operator |
| AFIZ | Aerodrome Flight Information Zone. |
| AFM | Affirm |
| AFS | Aeronautical Fixed Service. |
| AFTN | Aeronautical Fixed Telecommunication Network. |
| A/G | Air-to-Ground |
| AGL | Above Ground Level |
| AGN | Again. |
| AIC | Aeronautical Information Circular. |
| AIDC | Air Traffic Services Inter facility Data Communication. |
| AIP | Aeronautical Information Publication. |
| Airac | Aeronautical Information Regulation and Control. |
| AIREP | Air Report. |
| AIS | Aeronautical Information Services. |
| ALA | Alighting Area. |
| ALERFA | Alert Phase. |
| ALPHA Scramble | Immediate departure with high priority (only used during QRA). |
| ALR | Alerting. |
| ALRS | Alerting Service. |
| ALS | Approach Light System. |
| ALT | Altitude. |
| ALTN | Alternate airport. |
| AMA | Area Minimum Altitude. |
| AMC | Airspace Management Cell. |
| AMD | Amend. |
| AMDT | Amendment. |
| AMHS | ATS Message Handling System. |
| AMS | Aeronautical Mobile Service. |
| AMSL | Above Mean Sea Level. |
| AMSS | Aeronautical Mobile Satellite Service. |
| ANC | Aeronautical Chart. |
| ANCS | Aeronautical Navigation Chart. |
| ANM | ATFM Notification Message. |
| AO | Aircraft Operator. |
| AOC | Aerodrome Obstacle Chart. |
| AOCS | Air Operations Control Station. |
| AOM | Airside Operations Manager. |
| AP | Autopilot. |
| AP | Airport. |
| APAPI | Abbreviated Precision Approach Path Indicator. |
| APCH | Approach. |
| APDC | Aircraft Parking or Docking Chart. |
| APN | Apron. |
| APP | Approach Control |
| APRX | Approximate. |
| APSG | After Passing. |
| APU | Auxiliary Power Unit. |
| APV | Approve. |
| ARC | Area Chart. |
| ARN | Arrange. |
| ARO | Air Traffic Service Reporting Office. |
| ARP | Aerodrome Reference Point. |
| ARQ | Automatic Error Correction. |
| ARR | Arrival. |
| ARS | Special Air Report. |
| ASC | Ascent. |
| ASDA | Accelerate Stop Distance Availeble. |
| ASE | Altimetry Stop Distance Availeble. |
| ASI | Airspeed Indicator. |
| ASM | Airspace Management. |
| ASR | Approach Surveillance Radar. |
| ATA | Actual Time of Arrival. |
| ATAS | Automatic Telephone Answering System. |
| ATC | Air Traffic Control. |
| ATCS | Air Traffic Control Service. |
| ATD | Actual Time of Departure. |
| ATFM | Air Traffic Flow Management. |
| ATIS | Automatic Terminal Information Service. |
| ATM | Air Traffic Management. |
| ATN | Aeronautical Telecom Network. |
| ATS | Air Traffic Services. |
| ATZ | Aerodrome Traffic Zone. |
| AUP | Airspace Use Plan. |
| AUX | Auxiliary. |
| AVG | Average. |
| AVGAS | Aviation Gasoline. |
| AWTA | Advice at What Time Able. |
| AWY | Airway. |
| AZM | Azimuth. |
B | BA | Braking Action |
| BARO-VNAV | Barometric Vertical Navigation |
| BASE | Cloud base |
| BCFG | Fog patches |
| BCN | Beacon (aeronautical ground light) |
| BCST | Broadcast |
| BDRY | Boundary |
| BECMG | Becoming |
| BFR | Before |
| BKN | Broken |
| BL | Blowing (followed DU = dust, SA = sand or SN = snow) |
| BLDG | Building |
| BLO | Below Clouds |
| BOMB | Bombing |
| BR | Mist |
| BRG | Bearing |
| BRKG | Braking |
| BS | Broadcasting station |
| BTL | Between Layers |
| BUFR | Binary Universal Form for the Representation of meteorological data |
C | C | Degrees Celsius. |
| CA | Course to an Altitude. |
| CADF | Centralized Airspace Data Function. |
| CAS | Calibrated Air Speed. |
| CAT | Category. |
| CAT | Clear Air Turbulence. |
| CAVOK | Ceiling and Visibility are Okay. |
| CB | Cumulonimbus. |
| CBA | Cross border area. |
| CC | Cirrocumulus. |
| CDA | Continuous Descent Approach. |
| CDI | Course Deviation Indicator. |
| CDU | Control Display Unit. |
| CDM | Collaborative Decision Making. |
| CDO | Continuous Descent Operations. |
| CDR | Conditional Route. |
| CF | Course to a Fix. |
| CFM | Confirm. |
| CGL | Circling Guidance Light(s). |
| CH | Channel. |
| CHEM | Chemical. |
| CHG | Modification. |
| CI | Cirrus. |
| CI | Cost Index. |
| CIDIN | Common ICAO Data Interchange Network. |
| CIT | Near or over large towns. |
| CIV | Civil. |
| CK | Check. |
| CL | Centre line. |
| CLA | Clear type of ice formation. |
| CLBR | Calibration. |
| CLD | Cloud. |
| CLG | Calling. |
| CLIMB-OUT | Climb-out Area. |
| CLR | Clear(s), cleared to or clearance. |
| CLSD | Close or Closed or Closing. |
| cm | Centimetre. |
| CMB | Climb to or Climbing to. |
| CMPL | Completion or Completed or complete. |
| CNL | Cancel or Cancelled. |
| CNL | Flight plan Cancellation. |
| CNS | Communications, Navigation and Surveillance. |
| COM | Communications. |
| CONC | Concrete. |
| COND | Condition. |
| CONS | Continuous. |
| CONST | Construction or Constructed. |
| CONT | Continue(s) or Continued. |
| COOR | Co-ordinate or Co-ordination. |
| COORD | co-ordinates. |
| COP | Change-over point. |
| COR | Correct or Correction or Corrected. |
| COT | At the Coast. |
| COV | Cover or Covered or Covering. |
| CPDLC | Controller-pilot Data Link Communications. |
| CPL | Current Flight Plan. |
| CRC | Cyclic Redundancy Check. |
| CRM | Collision Risk Model. |
| CRZ | Cruise. |
| CS | CallSign. |
| CS | Cirrostratus. |
| CTA | Control Area. |
| CTAM | Climb To And Maintain. |
| CTC | Contact. |
| CTL | Control |
| CTN | Caution. |
| CTOT | Calculated Take-Off Time. |
| CTR | Control Zone. |
| CU | Cumulus. |
| CUF | Cumuliform. |
| CUST | Customs. |
| CVR | Cockpit Voice Recorder. |
| CW | Continuous Wave. |
| CWY | Clearway. |
D | D | Downward. |
| DA | Decision Altitude. |
| D-ATIS | Data Link Automatic Terminal Information Service. |
| DCD | Double Channel Duplex. |
| DCKG | Docking. |
| DCP | Datum Crossing Point. |
| DCPC | Direct Controller-Pilot Communications. |
| DCS | Double Channel Simplex. |
| DCT | Direct. |
| DEC | December. |
| DEG | Degrees. |
| DEP | Depart or Departure. |
| DEPO | Deposition. |
| DER | Departure End of the Runway. |
| DELTA Scramble | Fighter jets are starting and they're standing by for further instructions (only used during QRA). |
| DES | Descend to or Descending to. |
| DEST | Destination. |
| DETRESFA | Distress phase. |
| DEV | Deviation or Deviating. |
| DF | Direction Finding. |
| DFDR | Digital Flight Data Recorder. |
| DFTI | Distance From Touchdown Indicator. |
| DH | Decision Height. |
| DIF | Diffuse. |
| DIST | Distance. |
| DIV | Divert or Diverting. |
| DLA | Delay or Delayed. |
| DLIC | Data Link Initiation Capability. |
| DLY | Daily. |
| DME | Distance Measuring Equipment. |
| DNG | Danger or Dangerous. |
| DOG | Date of Flight. |
| DOM | Domestic. |
| DP | Dew Point (temperature). |
| DPT | Depth. |
| DR | Dead Reckoning. |
| DR | Low Drifting. |
| DRG | During. |
| DS | Duststorm. |
| DSB | Double Sideband. |
| DTAM | Descend To And Maintain. |
| DTG | Date-Time Group. |
| DTHR | Displaced Runway Threshold. |
| DTRT | Deteriorate or Deteriorating. |
| DTW | Dual Tandem Wheels. |
| DU | Dust. |
| DUC | Dense Upper Cloud. |
| DUPE | Duplicate message. |
| DUR | Duration. |
| D-VOLMET | Datalink VOLMET. |
| DVOR | Doppler VOR. |
| DVORTAC | Doppler VOR and TACAN. |
| DW | Dual wheels. |
| DZ | Drizzle. |
E | E | Endurance. |
| EASA | European Aviation Safety Agency. |
| EAS | Equivalent Air Speed. |
| EAT | Expected Approach Time. |
| EAUP | European Airspace Use Plan. |
| EB | Eastbound. |
| ECAC | European Civil Aviation Conference. |
| EDA | Elevation Differential Area. |
| EEE | Error. |
| EET | Estimated Elapsed Time. |
| EFC | Expect Further Clearance. |
| EFCT | Expected Further Clearance Time. |
| EFIS | Electronic Flight Instrument System. |
| EGNOS | European Geostationary Navigation Overlay Service. |
| EHF | Extremely High Frequency. |
| ELBA | Emergency Location Ceacon Aircraft. |
| ELEV | Elevation. |
| ELR | Extra Long Range. |
| ELT | Emergency Locator Transmitter. |
| EM | Emission. |
| EMBD | Embedded in a layer. |
| EMERG | Emergency. |
| En | English. |
| END | Stop-end. |
| ENE | East-North-East. |
| ENG | Engine. |
| ENR | En-route. |
| ENRC | En-route chart. |
| EPU | Emergency Power Unit. |
| EOBT | Estimated Off-Block Time. |
| EQPT | Equipment. |
| ESE | East-South-East. |
| EST | Estimate or Estimated or Estimate. |
| ETA | Estimated Time of Arrival or Estimating Arrival. |
| ETD | Estimated Time of Departure or Estimating Departure. |
| ETO | Estimated Time Over Significant Point. |
| EUR RODEX | European Regional OPMET data exchange. |
| EUUP | European Updated Airspace Use Plan. |
| EV | Every. |
| EVS | Enhanced Vision System. |
| EXC | Except. |
| EXER | Exercises or Exercising or to Exercise. |
| EXP | Expect or Expected or expecting. |
| EXTD | Extend or Extending. |
F | F | degrees Fahrenheit. |
| F | Fixed. |
| FA | Fourse from a fix to an altitude. |
| FAC | Facilities and Forward Air Controller |
| FAF | Final Approach Fix. |
| FAL | Facilitation of International air Transport. |
| FANS | Future Air Navigation System. |
| FAP | Final Approach Point. |
| FAS | Final Approach Segment. |
| FATO | Final Approach and Take-Off area. |
| FAX | Facsimile Transmission. |
| FC | Funnel Cloud. |
| FCST | Forecast. |
| FCT | Friction Coefficient. |
| FDPS | Flight Data Processing System |
| FEB | February. |
| FEW | Few. |
| FG | Fog. |
| FIC | Flight Information Centre. |
| FIO | Flight Information Office. |
| FIR | Flight Information Region. |
| FIS | Flight Information Service. |
| FISA | Automated Flight Information Service. |
| Fl | Flashing. |
| FL | Flight level. |
| FLD | Field. |
| FLG | Flashing. |
| FLR | Flares. |
| FLT | Flight. |
| FLTCK | Flight Check. |
| FLUC | Fluctuating, Fluctuation or Fluctuated. |
| FLW | Follow(s) or Following. |
| FLY | Fly or Flying. |
| FM | Course from a fix to a termination. |
| FM | From. |
| FMC | Flight Management Computer. |
| FMP | Flow Management Position. |
| FMS | Flight Management System. |
| FMU | Flow Management Unit. |
| FNA | Final Approach. |
| FOXTROT Scramble | Cancellation (only used during QRA). |
| FPAP | Flight Path Alignment Point. |
| FPL | Filed Flight Plan. |
| FPM | Feet Per Minute. |
| FPR | Flight Plan Route. |
| FR | Fuel Remaining. |
| Fr | French. |
| FREQ | Frequency. |
| FRI | Friday. |
| FRNG | Firing. |
| FRONT | Front. |
| FROST | Frost. |
| FRQ | Frequent. |
| FSC | Flight Service Centre. |
| FSL | Full Stop Landing. |
| FSS | Flight Service Station. |
| FST | First. |
| FSU | Flight Service Unit. |
| ft | Feet. |
| FTE | Flight Technical Error. |
| FTP | Fictitious Threshold Point. |
| FTT | Flight Technical Tolerance. |
| FU | Smoke. |
| FUA | Flexible Use Of Airspace. |
| FZ | Freezing. |
| FZDZ | Freezing Drizzle. |
| FZFG | Freezing Fog. |
| FZRA | Freezing Rain. |
G | G | Green. |
| GA | General Aviation. |
| GA | Go Ahead. |
| G/A | Ground-To-Air. |
| G/A/G | Ground-To-Air and Air-To-Ground. |
| GAGAN | GPS And Geostationary Earth Orbit Augmented Navigation. |
| GAIN | Airspeed or Headwind Gain. |
| GAMET | Area Forecast For Low Level Flights. |
| GARP | GBAS azimuth reference point. |
| GAT | General Air Traffic. |
| GBAS | Ground-Based Augmentation System. |
| GCA | Ground Controlled Approach System or Ground Controlled Approach. |
| Ge | German |
| GEN | General. |
| GEO | Geographic Or True. |
| GES | Ground Earth Station. |
| GHz | Giga Hertz. |
| GLD | Glider. |
| GLLFC | Graphical Low Level Forecast. |
| GLONASS | Global Orbiting Navigation Satellite System. |
| GLS | GBAS Landing System |
| GMC | Ground Movement Chart. |
| GND | Ground |
| GNDCK | Ground Check. |
| GNSS | Global Navigation Satellite System. |
| GP | Glide Path. |
| GPA | Glide Path Angle. |
| GPIP | Glide Path Intercept Point. |
| GPS | Global Positioning System. |
| GPU | Ground Power Unit. |
| GPWS | Ground Proximity Warning System. |
| GR | Hail. |
| GRAS | Ground-Based Regional Augmentation System . |
| GRASS | Grass Landing Area. |
| GRVL | Gravel. |
| GS | Ground Speed. |
| GS | Small Hail and/or Snow Pellets. |
| GUND | Geoid Undulation. |
H | H24 | Continuous day and night. |
| HA | Holding/ to an Altitude. |
| HAP | Heli Aiming Point. |
| HAPI | Helicopter Approach Path Indicator. |
| HBN | Hazard Beacon. |
| HDF | High Frequency Direction Finding Station. |
| HDG | Heading. |
| HEL | Helicopter. |
| HEMS | Helicopter Emergency Medical Service. |
| HF | High Frequency. |
| HF | Holding to a Fix. |
| HGT | Height. |
| HJ | Sunrise to Sunset. |
| HLDG | Holding. |
| HM | Holding to a manual Termination. |
| HMR | Helicopter Main Route. |
| HO | Service available to meet operational requirements. |
| Ho | Dutch/Holland/Netherlands. |
| HOL | Holiday. |
| HOSP | Hospital Aircraft. |
| hPa | Hectopascal. |
| HPZ | Helicopter Protection Zone. |
| HR | Hours. |
| HS | Service available during hours of scheduled operations. |
| HSI | Horizontal Situation Indicator |
| HTZ | Helicopter Traffic Zone. |
| HUD | Head-Up Display. |
| HURCN | Hurricane. |
| HVDF | High and Very High Frequency Direction Finding stations. |
| HVY | Heavy. |
| HYR | Higher. |
| HZ | Haze. |
| Hz | Hertz. |
I | IAC | Instrument Approach Chart. |
| IAF | Initial Approach Fix. |
| IAO | In And Out of clouds. |
| IAP | Instrument Approach Procedure. |
| IAR | Intersection of Air Routes. |
| IAS | Indicated Airspeed. |
| IBN | Identification Beacon. |
| IC | Ice Crystals. |
| ICAO | International Civil Aviation Organization. |
| ICE | Icing. |
| ID | Identifier / Identify. |
| IDENT | Identification. |
| IF | Intermediate Approach Fix. |
| IFF | Identification Friend/Foe. |
| IFPS | Integrated Initial Flight Plan Processing System. |
| IFR | Instrument Flight Rules. |
| IGA | International General Aviation. |
| ILS | Instrument Landing System. |
| IM | Inner Marker. |
| IMC | Instrument Meteorological Conditions. |
| IMG | Immigration. |
| IMI | Interrogation Sign. |
| IMPR | Improve or Improving. |
| IMT | Immediate / Immediately. |
| INA | Initial Approach. |
| INBD | Inbound. |
| INC | In Cloud. |
| INCERFA | Incertainty Phase. |
| INFO | Information. |
| INOP | Inoperative. |
| INP | If Not Possible. |
| INPR | In Progress. |
| INS | Inertial Navigation System. |
| INSTL | Install. |
| INSTR | Instrument. |
| INT | Intersection. |
| INTL | International. |
| INTRG | Interrogator. |
| INTRP | Interrupt / Interruption. |
| INTSF | Intensify / Intensifying. |
| INTST | Intensity. |
| IR | Ice on Runway. |
| IRS | Inertial Reference System. |
| ISA | International Standard Atmosphere. |
| ISB | Independent Sideband. |
| ISOL | Isolated. |
J | JAA | Joint Aviation Authorities. |
| JAN | January. |
| JPALS | Joint Precision Approach and Landing System |
| JRCC | Joint Rescue Co-ordination Centre. |
| JTST | Jet Stream. |
| JUL | July. |
| JUN | June. |
K | kg | Kilograms. |
| kHz | Kilohertz. |
| KIAS | Knots Indicated Airspeed. |
| km | Kilometres. |
| kmH | Kilometres per Hour. |
| kPa | Kilopascal. |
| KT | Knots. |
| kW | Kilowatts. |
L | LAAS | Local Area Augmentation System. |
| LAM | Logical Acknowledgement. |
| LAN | Inland |
| LAT | Latitude |
| lb | pounds |
| LCA | Local |
| LCN | Load Classification Number |
| LDA | Localizer-type Directional Aid. |
| LDA | Landing Distance Available |
| LDAH | Landing Distance Available, Helicopter |
| LDG | Landing |
| LDI | Landing Direction Indicator |
| LEN | Length |
| LF | Low Frequency |
| LGT | Light / Lighting |
| LGTD | Lighted |
| LIH | Light Intensity High |
| LIL | light Intensity Low |
| LIM | Light Intensity Medium |
| LINE | Line |
| LLFC | Low Level Forecast |
| LM | Locator Middle |
| LMT | Local Mean Time |
| LNAV | Lateral Navigation |
| LNG | Long |
| LO | Locator Outer |
| LOC | Localizer |
| LONG | Longitude |
| LOSS | Airspeed Or Headwind Loss |
| LPV | Localizer Performance with Vertical guidance |
| LRG | Long Range |
| LTD | Limited |
| LTP | Landing Threshold Point |
| LTT | Landline Teletypewriter |
| LV | Light and Variable |
| LVE | Leave / Leaving |
| LVL | Level |
| LVP | Low visibility procedures |
| LYR | Layer or layered |
| | |
M | MAA | Maximum authorized altitude. |
| MAA | Medical Air Assistance. |
| MAA | Maastricht Aachen Airport |
| MAG | Magnetic. |
| MAHF | Missed approach holding fix. |
| MAINT | Maintenance. |
| MAP | Missed Approach Point. |
| MAP | Aeronautical maps and charts. |
| MAPT | Missed approach point. |
| MAR | at sea. |
| MAR | March. |
| MAS | Manual A1 Simplex. |
| MATF | Missed Approach Turning Fix. |
| MAX | Maximum. |
| MAY | May. |
| MBST | Microburst. |
| MCA | Minimum Crossing Altitude. |
| MCW | Modulated Continuous Wave. |
| MDA | Minimum Descent Altitude. |
| MDCN | Military Diplomatic Clearance Number. |
| MDF | Medium Frequency Direction Finding Station. |
| MDH | Minimum Descent Height. |
| MEA | Minimum En-Route Altitude. |
| MEHT | Minimum Eye Height over Threshold. |
| MET | Meteorological. |
| METAR | Meteorological Aerodrome Report. |
| MF | Medium Frequency. |
| MFA | Minimum Flight Altitude. |
| MFD | Multifunction Display. |
| MHDF | Medium and High Frequency Direction Finding Stations. |
| MHVDF | Medium, High and Very High Frequency Direction Finding Stations. |
| MHz | Megahertz. |
| MID | Mid-point. |
| MIFG | Shallow Fog. |
| MIL | Military. |
| MIN | Minutes. |
| MIS | Missing. |
| MKR | Marker Radio Beacon. |
| MLA | Microlight Aeroplane. |
| MLS | Microwave Landing System. |
| MLW | Maximum Certificated Landing Weight. |
| MM | Middle marker. |
| MNM | Minimum. |
| MNPS | Minimum Navigation Performance Specifications. |
| MNT | Monitor. |
| MNTN | Maintain. |
| MOA | Military Operating Area. |
| MOC | Minimum Obstacle Clearance. |
| MOCA | Minimum Obstacle Clearance Altitude. |
| MOD | Moderate. |
| MOGAS | Motor Gasoline. |
| MON | Above Mountains. |
| MON | Monday. |
| MOPS | Minimum Operational Performance Standards. |
| MOV | Move. |
| Mpa | Megapascal. |
| mps | Metres per Second. |
| MRA | Minimum Reception Altitude. |
| MRG | Medium Range. |
| MRP | ATS/MET Reporting Point. |
| MRVA | Minimum Radar Vector Altitude. |
| MS | Minus. |
| MSA | Minimum Sector Altitude. |
| MSAW | Minimum Safe Altitude Warning. |
| MSG | Message. |
| MSL | Mean Sea Level. |
| MSR | Messagel. |
| MSSR | Monopulse Secondary Surveillance Radar. |
| MT | Mountain. |
| MTI | Marked Temperature Inversion. |
| MTMA | Military Terminal Control Area. |
| MTOW | Maximum Take-Off Weight. |
| MTU | Metric Units. |
| MTW | Mountain Waves. |
| MVA | Minimum vectoring altitudes. |
| MVDF | Medium and Very High Frequency Direction Finding Stations. |
| MWO | Meteorological Watch Office. |
| MX | Mixed type of Ice Formation. |
N | NA | Not Applicable. |
| NADP | Noise Abatement Departure Procedure. |
| NASC | National AIS System Centre. |
| NAT | North Atlantic. |
| NATO | North Atlantic Treaty Organization. |
| NAV | Navigation. |
| NAVO | Noord Atlantische Verdrags Organisatie. |
| NB | Northbound. |
| NBFR | Not Before. |
| NC | No Change. |
| NCD | No Cloud Detected. |
| ND | Navigation Display. |
| NDB | Non-Directional Radio Beacon. |
| NDV | No Directional Variations Available. |
| NE | North-East. |
| NEB | North-Eastbound. |
| NEG | No / Negative. |
| NGT | Night. |
| NIL | None. |
| NM | Nautical Miles. |
| NML | Normal. |
| NN | No Name. |
| NNE | North-North-East. |
| NNW | North-North-West. |
| NO | No / Negative. |
| NOF | International NOTAM Office. |
| NOSIG | No Significant Change . |
| NOTAM | Notice to Airmen. |
| NOV | November. |
| NOZ | Normal Operating Zone. |
| NPA | Non-Precision Approach. |
| NR | Number. |
| NRH | No Reply Heard. |
| NS | Nimbostratus. |
| NSC | Nil Significant Cloud. |
| NSE | Navigation System Error. |
| NSW | Nil Significant Weather. |
| NTL | National. |
| NTZ | No Transgression Zone. |
| NU | Not Usable. |
| NW | North-West. |
| NWB | North-Westbound. |
| NXT | Next. |
O | OAC | Oceanic Area Control Centre. |
| OAS | Obstacle Assessment Surface. |
| OAT | Operational Air Traffic. |
| OBS | Observe / Observed / Observation. |
| OBSC | Obscure / Obscured / Obscuring. |
| OBST | Obstacle. |
| OCA | Obstacle clearance Altitude. |
| OCA | Oceanic Control Area. |
| OCC | Occulting. |
| OCH | Obstacle Clearance Height. |
| OCNL | Occasional / Occasionally. |
| OCS | Obstacle Clearance Surface. |
| OCT | October. |
| OFZ | Obstacle Free Zone. |
| OGN | Originate. |
| OHD | Overhead. |
| OIS | Obstacle Identification Surface. |
| OLDI | Online Data Interchange. |
| OM | Outer Marker. |
| OPA | Opaque. |
| OPC | Control Indicated is Operational Control. |
| OPMET | Operational Meteorological. |
| OPN | Open. |
| OPR | Operator. |
| OPS | Operations. |
| O/R | On Request. |
| ORD | Order. |
| ORP | Original Readiness Platform. |
| OSV | Ocean Station Vessel. |
| OTP | On Top. |
| OTS | Organized Track System. |
| OUBD | Outbound. |
| OVC | Overcast. |
P | PA | Precision Approach. |
| PALS | Precision Approach Lighting System. |
| PANS | Procedures For Air Navigation Services. |
| PAPI | Precision Approach Path Indicator. |
| PAR | Precision Approach Radar. |
| PARL | Parallel. |
| PATC | Precision Approach Terrain Chart. |
| PAX | Passenger(s). |
| PBN | Performance-Based Navigation. |
| PCD | Proceed Or Proceeding. |
| PCL | Pilot-Controlled Lighting. |
| PCN | Pavement Classification Number. |
| PDC | Pre-Departure Clearance. |
| PDG | Procedure Design Gradient. |
| PDT | Procedure Design Tool. |
| PER | Performance. |
| PERM | Permanent. |
| PIB | Pre-flight Information Bulletin. |
| PIC | Pilot in Command. |
| PJE | Parachute Jumping Exercise. |
| PL | Plain Language. |
| PL | Ice Pellets. |
| PLA | Practice Low Approach. |
| PLN | flight Plan. |
| PLVL | Present Level. |
| PN | Prior Notice Required. |
| PNR | Point of No Return. |
| PO | Dust/Sand Whirls. |
| POB | Persons On Board. |
| POSS | Possible. |
| PPI | Plan Position Indicator. |
| PPR | Prior Permission Required. |
| PPSN | Present Position. |
| PRFG | Aerodrome Partially Covered by Fog. |
| PRI | Primary. |
| PRKG | Parking. |
| PROB | Probability. |
| PROC | Procedure. |
| PROV | Provisional. |
| PRP | Point-in-space Reference Point. |
| PS | Plus. |
| PSG | Passing. |
| PSN | Position. |
| PSP | Pierced Steel Plank. |
| PSR | Primary Surveillance Radar. |
| PSYS | Pressure System(s). |
| PTN | Procedure Turn. |
| PTS | Polar Track Structure. |
| PWR | Power. |
Q | QDM | Magnetic heading with no wind. |
| QDR | Magnetic bearing. |
| QFE | Atmospheric pressure at aerodrome elevation. |
| QFU | Magnetic orientation of runway. |
| QNH | Atmospheric pressure. |
| QRA | Quick Reaction Alert. |
| QTE | True bearing. |
R | RA | Rain. |
| RA | Resolution Advisory. |
| RAC | Rules of the air and air traffic services. |
| RAG | Ragged. |
| RAG | Runway Arresting Gear. |
| RAI | Runway Alignment Indicator. |
| RAIM | Receiver Autonomous Integrity Monitoring. |
| RAPCON | Radar Approach Control. |
| RASC | Regional AIS System Centre. |
| RASS | Remote Altimeter Setting Source. |
| RB | Rescue Boat. |
| RCA | Reach Cruising Altitude. |
| RCC | Rescue Co-ordination Centre. |
| RCF | Radio Communication Failure. |
| RCH | Reach / Reaching. |
| RCL | Runway Centre Line. |
| RCLL | Runway Centre Line Light(s). |
| RCLR | Recleared. |
| RCP | Required Communication Performance. |
| RDH | Reference Datum Height. |
| RDL | Radial. |
| RDO | Radio. |
| RE | Recent. |
| REC | Receive / Receiver. |
| REDL | Runway edge light(s). |
| REF | Reference. |
| REG | Registration. |
| RENL | Runway End Light(s). |
| REP | Report / Reporting point. |
| REQ | Request / Requested. |
| RERTE | Re-Route. |
| RESA | Runway End Safety Area. |
| RETD | Revised Estimated Time of Departure. |
| RF | Constant Radius arc to a Fix. |
| RFP | Replacement Flight Plan. |
| RG | Range. |
| RHC | Right-Hand Circuit. |
| RIF | Reclearance In Flight. |
| RIME | Rime. |
| RITE | Right. |
| RL | Report Leaving. |
| RLA | Relay. |
| RLCE | Request Level Change En-route. |
| RLLS | Runway Lead-in Lighting System. |
| RLNA | Request Level Not Available. |
| RMK | Remark. |
| RMZ | Radio Mandatory Zone. |
| RNAV | Area Navigation. |
| RNG | Radio Range. |
| RNLAF | Royal Netherlands Air Force. |
| RNN | Royal Netherlands Navy. |
| RNP | Required Navigation Performance. |
| ROBEX | Regional OPMET Bulletin Exchange. |
| ROC | Rate Of Climb. |
| ROD | Rate Of Descent. |
| RON | Receiving Only. |
| RPAS | Remotely Piloted Aircraft Systems. |
| RPDS | Reference Path Data Selector. |
| RPI | Radar Position Indicator. |
| RPL | Repetitive Flight Plan. |
| RPLC | Replace / Replaced. |
| RPS | Radar Position Symbol. |
| RPT | Repeat. |
| RQ | Request. |
| RQMNTS | Requirements. |
| RQP | Request Flight Plan. |
| RQS | Request Supplementary Flight Plan. |
| RR | Report Reaching. |
| RSC | Rescue Sub-Centre. |
| RSCD | Runway Surface Condition. |
| RSP | Responder Beacon. |
| RSR | En-route Surveillance Radar. |
| RSS | Root Sum Square. |
| R/T | Radiotelephony. |
| RTD | Delayed. |
| RTE | Route. |
| RTF | Radiotelephone. |
| RTG | Radiotelegraph. |
| RTHL | Runway Threshold Light(s). |
| RTN | Return / returned. |
| RTODAH | Rejected Take-Off Distance Available Helicopter. |
| RTS | Return To Service. |
| RTT | Radioteletypewriter. |
| RTZL | Runway Touchdown Zone Light(s). |
| RV | Rescue Vessel. |
| RVR | Runway Visual Range |
| RVSM | Reduced Vertical Separation Minimum. |
| RWY | Runway. |
S | SA | Sand. |
| SALS | Simple Approach Lighting System. |
| SAN | Sanitary. |
| SAP. | As Soon as Possible |
| SAR | Search And Rescue. |
| SARPS | Standards And Recommended Practices. |
| SAT | Saturday. |
| SATCOM | Satellite Communication. |
| SB | Southbound. |
| SBAS | Satellite-based augmentation system. |
| SC | Stratocumulus. |
| SCT | Scattered. |
| SD | Standard Deviation. |
| SDBY | Standby. |
| SDF | Step Down Fix. |
| SDF | Simplified Direction Facility. |
| SE | South-east. |
| SEA | Sea. |
| SEB | South-eastbound. |
| SEC | Seconds. |
| SECN | Section. |
| SECT | Sector. |
| SEL | SELCAL (see one below). |
| SELCAL | Selective Calling System. |
| SEP | September. |
| SER | Service / served. |
| SERA | Standardised European Rules of the Air. |
| SEV | Severe. |
| SFC | Surface. |
| SG | Snow Grains. |
| SGL | Signal. |
| SH | Showers. |
| SHF | Super High Frequency. |
| SI | International system of units. |
| SID | Standard Instrument Departure. |
| SIF | Selective Identification Feature. |
| SIG | Significant. |
| SIGMET | Information concerning en route weather. |
| SIMUL | Simultaneous / Simultaneously. |
| SIWL | Single Isolated Wheel Load. |
| SKED | Schedule / Scheduled. |
| SLP | Speed Limiting Point. |
| SLW | Slow. |
| SMC | Surface Movement Control. |
| SMR | Surface Movement Radar. |
| SN | Snow. |
| SNOCLO | Aerodrome Closed due to Snow. |
| SNOWTAM | Notifications of runway/taxiway/apron status with respect to snow, ice, and standing water |
| SOC | Start Of Climb. |
| SPECI | Aerodrome special meteorological report. |
| SPECIAL | Special local meteorological report |
| SPI | Special position indicator. |
| SPL | Supplementary Flight Plan. |
| SPOC | SAR Point of Contact. |
| SPOT | Spot Wind. |
| SQ | Squall. |
| SQL | Squall Line. |
| SR | Sunrise. |
| SR-30 | 30 minutes BEFORE sunrise. |
| SRA | Surveillance Radar Approach. |
| SCRAMBLE | Urgent flight. Combat control uses multiple statuses: Alpha scramble = Immediate departure, high priority; Delta scramble = Fighter jets are starting and theyre standing by for further instructions; Tango scramble = Exercise; Foxtrot scramble = Cancell |
| SRE | Surveillance Radar Element of PAR. |
| SRG | Short Range. |
| SRR | Search And Rescue Region. |
| SRY | Secondary. |
| SRZ | Special Rules Zone. |
| SS | Sandstorm. |
| SS | Sunset. |
| SS+30 | 30 minutes AFTER sunset. |
| SSB | Single Sideband. |
| SSE | South-south-east. |
| SSR | Secondary Surveillance Radar. |
| SST | Supersonic Transport. |
| SSW | South-south-west. |
| ST | Stratus. |
| STA | straight-in Approach. |
| STA | Scheduled Time of Arrival |
| STAR | Standard Instrument Arrival. |
| STD | Standard. |
| STD | Scheduled Time of Departure. |
| STF | Stratiform. |
| STN | Station. |
| STNR | Stationary. |
| STOL | Short take-off and landing. |
| STS | Status. |
| STWL | Stopway light(s). |
| SUBJ | Subject. |
| SUN | Sunday. |
| SUP | Supplement. |
| SUPPS | Regional Supplementary Procedures. |
| SVC | Service Message. |
| SVCBL | Serviceable. |
| SW | South-west. |
| SWB | South-westbound. |
| SWC | Significant Weather Chart. |
| SWY | Stopway. |
T | TA | Traffic Advisory. |
| TA | Transition Altitude. |
| TAA | Terminal Arrival Altitude. |
| TACAN | Tactical Air Navigation Aid. |
| TAF | Aerodrome Forecast. |
| TA/H | Turn At an Altitude/Height. |
| TAIL | Tail Wind. |
| TANGO Scramble | Exercise, also known as MOCK scramble (only used during QRA). |
| TAR | Terminal Area Surveillance Radar. |
| TAS | True Airspeed. |
| TAX | Taxiing / Taxi. |
| TC | Tropical Cyclone. |
| TCAC | Tropical Cyclone Advisory Centre. |
| TCAS | Traffic Alert and Collision Avoidance System. |
| TCH | Threshold crossing height. |
| TCU | Towering Cumulus. |
| TDO | Tornado. |
| TDZ | Touchdown Zone. |
| TECR | Technical Reason. |
| TEL | Telephone. |
| TEMPO | Temporary / Temporarily. |
| TF | Track to Fix. |
| TFC | Traffic. |
| TGL | Touch-And-Go Landing. |
| TGL | Temporary Guidance Leaflet. |
| TGS | Taxiing Quidance System. |
| THR | Threshold. |
| THRU | Through. |
| THU | Thursday. |
| TIBA | Traffic Information Broadcast by Aircraft. |
| TIL | Until. |
| TIP | Until past. |
| TIZ | Traffic Information Zone. |
| TKOF | Take-Off. |
| TL | Till. |
| TLOF | Touchdown and Lift-Off Area. |
| TMA | Terminal Control Area. |
| TMZ | Transponder Mandatory Zone. |
| TN | Minimum Temperature. |
| TNA | Turn Altitude. |
| TNH | Turn Height. |
| TOBT | Target Off-Block Time. |
| TOC | Top Of Climb. |
| TODA | Take-Off Distance Available. |
| TODAH | Take-Off Distance Available Helicopter. |
| TOP | Cloud Top. |
| TORA | Take-Off Run Available. |
| TOX | Toxic. |
| TP | Turning Point. |
| TR | Track. |
| TRA | Temporary Reserved Airspace. |
| TRA | Transavia. |
| TRANS | Transmits / Transmitter. |
| TREND | Trend forecast. |
| TRL | Transition Level. |
| TROP | Tropopause. |
| TS | Thunderstorm. |
| TSA | Temporary Segregated Area. |
| TSAT | Target Start-up Approval Time. |
| TSUNAMI | Tsunami. |
| TT | Teletypewriter. |
| TUE | Tuesday. |
| TURB | Turbulence. |
| TVOR | Terminal VOR. |
| TWR | Aerodrome control Tower. |
| TWY | Taxiway. |
| TWYL | Taxiway Link. |
| TX | Maximum Temperature. |
| TXT | Text. |
| TYP | Type of Aircraft. |
| TYPH | Typhoon. |
U | UHF | Ultra High Frequency. |
| UM | Unaccompanied Minor |
| UIR | Upper Information Region. |
V | VFR | Visual Flight Rules. |
| VHF | Very High Frequency. |
| VMC | Visual Meteorological Conditions. |
| VNAV | Vertical Navigation. |
| VOR | VHF Omnidirectional Radio Range. |
| VSI | Vertical Speed Indicator. |
W | WCHC | Wheel Chair Carry on/off; (for pax who can't walk) |
| WCHR | Wheel Chair Ramp; (for pax who cannot walk long distances). |
| WCHS | Wheel Chair Steps; (pax who cannot walk on stairs). |
X | X | Cross. |
| XBAR | Crossbar. |
| XNG | Crossing. |
| XS | Atmospherics. |
Y | YCZ | Yellow Caution Zone. |
| YES | Yes / Affirmative |
| YP | Young Passanger |
| YR | your |
Z | ZULU | Universal time |
| ZULU | Interne eenheidsnaam Politie helikopters. |