Civil aviation dictionary
Aviation glossary
Terms, abbreviations and procedures explained without unnecessary jargon, with English names and clear definitions.
- Total entries
- 2480
- Terms
- 435
- Abbreviations
- 2045
N
- AbbreviationNorthwest Mountain Region, FAA
ANM stands for Northwest Mountain Region, FAA in FAA terminology.
- Abbreviationnorthwesterly (weather reports only)
NWLY stands for northwesterly (weather reports only) in FAA terminology.
- Abbreviationnorthwestern (weather reports only)
NWRN stands for northwestern (weather reports only) in FAA terminology.
- Abbreviationnot applicable
N/A stands for not applicable in FAA terminology.
- Abbreviationnot in system
NIS stands for not in system in FAA terminology.
- OperationsNOT STANDARD
Varying from what is expected or published. For use in NOTAMs only.
- AbbreviationNOTAM Management Service
NMS stands for NOTAM Management Service in FAA terminology.
- AbbreviationNOTAM reporting the presence or removal of hazardous conditions due to snow, ice, slush or standing water associated with snow, slush or ice on the movement area
SNOWTAM stands for NOTAM reporting the presence or removal of hazardous conditions due to snow, ice, slush or standing water associated with snow, slush or ice on the movement area in FAA terminology.
- AbbreviationNotice to Airmen
An operational notice about changes or hazards relevant to flight operations.
- AbbreviationNotices To Airmen Publication
NTAP stands for Notices To Airmen Publication in FAA terminology.
- Abbreviationnotification of aircraft accident
ACCID stands for notification of aircraft accident in FAA terminology.
- Abbreviationnow simultaneous
NOSI stands for now simultaneous in FAA terminology.
- AbbreviationNWS Weather Excluding NXRD
NWSR stands for NWS Weather Excluding NXRD in FAA terminology.
O
- AbbreviationObservation of Potential Adverse Safety Impact
OPASI stands for Observation of Potential Adverse Safety Impact in FAA terminology.
- Abbreviationobstacle clearance altitude
OCA stands for obstacle clearance altitude in FAA terminology.
- Abbreviationobstacle clearance height
OCH stands for obstacle clearance height in FAA terminology.
- OperationsOBSTACLE FREE ZONE
The OFZ is a three-dimensional volume of airspace which protects the transition of aircraft to and from the runway.
- Abbreviationobstruction chart
OC stands for obstruction chart in FAA terminology.
- AbbreviationObstruction Evaluation/Airport Airspace Analysis
OE / AAA stands for Obstruction Evaluation/Airport Airspace Analysis in FAA terminology.
- AbbreviationOccupational Safety and Health Administration
OSHA stands for Occupational Safety and Health Administration in FAA terminology.
- Abbreviationoceanic air route tracking system
OARTS stands for oceanic air route tracking system in FAA terminology.
- OperationsOCEANIC AIRSPACE
Airspace over the oceans of the world, considered international airspace, where oceanic separation and procedures per the International Civil Aviation Organization are applied.
- Abbreviationoceanic area control
OAC stands for oceanic area control in FAA terminology.
- Abbreviationoceanic control area
OCA stands for oceanic control area in FAA terminology.