N/A: Not Applicable
N/E: Non Effective
NA: North Africa
NAAFI: Navy, Army, Air Force Institute
NAF: Numbered Air Force
NAP: Navigation Action Point
NARD: Northern Aircraft Repair Depot
NATO: North Atlantic Treaty Organisation
NAV: Navigator
NAVAID: Navigational Aid
Navex: Navigation Exercise
NAWW: Night All-weather Wing
NCO: Non Commissioned Officer
NCS: Northern Communication Squadron
NCU: Night Conversion Unit
NEA: Non effective Airframe
NEAFIS: North Eastern Air Flying Instructors School
NEAR: Near East Air Force
NEI: Netherlands East Indies
NFD: No further Data
NFDS: Night Fighter Development Squadron
NFDU: Night Fighter Development Unit
NFDW: Night Fighter Development Wing
NFF: Night Fighter Flight
NFLS: Night Fighter Leaders School
NFT: Night Flying Test
NFT: No further trace
NFTS: Night Fighter Training Squadron
NHS: New Hampshire
NI CF: Night Conversion Flight
NIOSH: National Institute for Occupational Safety and Health
NLT: no later than
nm: nautical miles
NMC: Not Mission Capable
NMSU: Nimrod Major Servicing Unit
NORAD: North American Air Defence
NORDO: No Radio
NOTAM: Notice to Airmen
NRC: Nuclear Reporting Cell
NRT: Non-Reporting Time