|
Definition |
Contraction |
Usage |
|
name
to |
NTO
|
GEN
|
|
Narrow |
NRW
|
GEN
|
|
National |
NATL
|
GEN
|
|
National
|
NTL
|
ICAO
|
|
National Aeronautics and Space
Administration |
NASA
|
GEN
|
|
National Air Traffic Controllers
Association |
NATCA
|
ATC
|
|
National Air Transport Coordinating
Committee |
NATCC
|
GEN
|
|
National Aircraft Noise Abatement
Council |
NANAC
|
GEN
|
|
National Airport System Plan
|
NASP
|
GEN
|
|
National Airspace Data Interchange
Network |
NADIN
|
GEN
|
|
National Airspace Performance Reporting
System |
NAPRS
|
ATC
|
|
National Airspace System
|
NAS
|
GEN
|
|
National Airspace System
Interfacility Communications System
|
NICS
|
GEN
|
|
National Airways System Engineering
office |
NASEO
|
GEN
|
|
National AIS system centre
|
NASC
|
ICAO
|
|
National Association of Air Traffic
Control Specialists |
NAATS
|
GEN
|
|
National Aviation Facilities
Experimental Center |
NAFEC
|
GEN
|
|
national beacon code allocation plan
|
NBCAP
|
GEN
|
|
National Climatic Data Center
|
NCDC
|
GEN
|
|
National Communications Center
|
NATCOM |
GEN
|
|
national communications schedule
|
NACOS
|
GEN
|
|
National Communications System
|
NCS
|
GEN
|
|
national environmental satellite service
|
NESS
|
GEN
|
|
National Flight Data Center
|
NFDC
|
GEN
|
|
National Flight Data Digest
|
NFDD
|
GEN
|
|
National Guard |
NG
|
GEN
|
|
National Meteorological Center
|
NMC
|
GEN
|
|
National Ocean Service
|
NOS
|
GEN
|
|
National Oceanic and Atmospheric
Administration |
NOAA
|
GEN
|
|
National Severe Storm Forecast Center
|
NSSFC
|
GEN
|
|
National Track Analysis Program
|
NTAP
|
ATC
|
|
National Transportation Safety Board
|
NTSB
|
GEN
|
|
National Weather Service
|
NWS
|
GEN
|
|
National Weather Service Support
Facility |
WSSF
|
GEN
|
|
National Weather Service Support Unit
|
WSSU
|
GEN
|
|
nautical mile |
NM
|
ICAO
|
|
nautical mile radius |
NMR
|
GEN
|
|
Naval
Air Facility |
NAF
|
GEN
|
|
Naval
Air Station |
NAS
|
GEN
|
|
Naval
Auxiliary Air Station
|
NAAS
|
GEN
|
|
Naval
Oceanographic Meteorological Automatic
Device |
NOMAD
|
GEN
|
|
Naval
Reserve Air Base |
NRAB
|
GEN
|
|
Naval
Weather Service Office
|
NWSO
|
GEN
|
|
navigation |
NAV
|
GEN
|
|
Navigation, ATC, and Collision Avoidance
System |
NATCAS |
GEN
|
|
navigational aid |
NAVAID |
GEN
|
|
Navy
Liaison Officer |
NAVLO
|
GEN
|
|
Navy
Representative to the FAA
|
NAVREP |
GEN
|
|
NDB
and DME (collocated) |
NDB/DME
|
GEN
|
|
near
|
NR
|
GEN
|
|
near
or over large towns |
CIT
|
ICAO
|
|
necessary |
NEC
|
GEN
|
|
negative |
NEG
|
GEN
|
|
negative replies not required
|
NONEG
|
GEN
|
|
negative vorticity advection
|
NVA
|
NWS
|
|
neighborhood |
NBRHD
|
GEN
|
|
New
Brunswick |
NB
|
NWS
|
|
New
England |
NEW
ENG |
NWS
|
|
New
England Region, FAA |
ANE
|
GEN
|
|
Newfoundland |
NFLD
|
NWS
|
|
next
|
NXT
|
GEN
|
|
night
|
NGT
|
NWS
|
|
night
frequency |
NFQ
|
GEN
|
|
nimbostratus |
NS
|
NWS
|
|
No
(negative) |
NO
|
ICAO
|
|
no
action necessary |
NOAC
|
GEN
|
|
no
additional traffic reported
|
NATR
|
ATC
|
|
no
arrival report |
NORIV
|
ATC
|
|
no
change |
NC
|
GEN
|
|
no
change in estimates |
NCE
|
ATC
|
|
no
change in weather |
NCWX
|
NWS
|
|
no
delay expected |
NDE
|
ATC
|
|
no
essential traffic reported
|
NETR
|
ATC
|
|
no
filing time |
NFT
|
GEN
|
|
no
further clearance required
|
NEF
|
ATC
|
|
no
further information |
NOFIN
|
GEN
|
|
no
information |
NOIFN
|
GEN
|
|
no
layers |
NL
|
NWS
|
|
no
middle name |
NMN
|
GEN
|
|
no
parallel traffic |
NPRL
|
ATC
|
|
no
pilot balloon observation due to high,
or gusty, surface wind
|
PIWI
|
NWS
|
|
no
pilot balloon observation due to snow
|
PISO
|
NWS
|
|
no
pilot balloon observation due to
unfavorable sea conditions
|
PISE
|
NWS
|
|
no
pilot balloon observation will be filed
next collection unless weather changes
significantly |
NORPI
|
NWS
|
|
no
procedure turn required
|
NOPT
|
GEN
|
|
no
radio |
NORDO
|
GEN
|
|
no
radio contact |
NORAC
|
ATC
|
|
no
RAWIN obs., communications out
|
RACO
|
NWS
|
|
no
RAWIN obs., high and gusty winds
|
RAWI
|
NWS
|
|
no
RAWIN obs., no balloons available
|
RABA
|
NWS
|
|
no
RAWIN obs., no gas available
|
RAHE
|
NWS
|
|
no
RAWIN obs., unfavorable weather
|
RAWE
|
NWS
|
|
no
record |
NOREC
|
GEN
|
|
no
record of destination
|
NRD
|
GEN
|
|
no
reply heard |
NRH
|
ICAO
|
|
no
reply received |
NORR
|
GEN
|
|
no
report |
NOREP
|
GEN
|
|
no
restrictions |
NORST
|
GEN
|
|
no
significant change |
NOSIG
|
ICAO
|
|
no
significant cloud |
NSC
|
ICAO
|
|
no
significant weather |
NSW
|
METAR
|
|
no
small craft or storm warning are being
displayed |
NSCSWD |
NWS
|
|
no
special observations taken (weather
reports only) |
NOSPL
|
NWS
|
|
no
specific working hours
|
HX
|
ICAO
|
|
no
traffic reported |
NTRP
|
ATC
|
|
no
transgression zone |
NTZ
|
ATC
|
|
No
transgression zone |
NTZ
|
ICAO
|
|
no
trouble found |
NTFND
|
GEN
|
|
noise
abatement test system
|
NATS
|
GEN
|
|
nondirectional radio beacon
|
NDB
|
ICAO
|
|
none
|
NIL
|
GEN
|
|
nonpersistent |
NPRS
|
NWS
|
|
nonprecision instrument
|
NPI
|
GEN
|
|
nonrevenue |
NRV
|
GEN
|
|
non-RVSM
capable flight |
NONRVSM |
ICAO
|
|
Nonstandard C/A Code |
NSC
|
ATC
|
|
nonstandard holding pattern
|
NSP
|
GEN
|
|
nonstop |
NSTP
|
GEN
|
|
NORAD
Region Operations Control Center
|
ROCC
|
GEN
|
|
NORAD
Sector Operations Control Center
|
SOCC
|
GEN
|
|
normal |
NML
|
GEN
|
|
normal operating zone
|
NOZ
|
GEN
|
|
Normal operating zone
|
NOZ
|
ICAO
|
|
North
American Aerospace Defense Command
|
NORAD
|
GEN
|
|
North
American Route |
NAR
|
GEN
|
|
North
American route program
|
NRP
|
ATC
|
|
North
Atlantic |
NAT
|
GEN
|
|
north
or northern latitude |
N
|
ICAO
|
|
North
Pacific |
NOPAC
|
ATC
|
|
northbound |
NB
|
ICAO
|
|
northbound |
NBND
|
GEN
|
|
north苟ast |
NE
|
ICAO
|
|
north苟astbound |
NEB
|
ICAO
|
|
northeasterly (weather reports only)
|
NELY
|
NWS
|
|
northeastern |
NERN
|
NWS
|
|
north要orth east |
NNE
|
ICAO
|
|
north要orth west |
NNW
|
ICAO
|
|
north要ortheastern (weather reports
only) |
NNERN
|
NWS
|
|
north要ortheastward (weather reports
only) |
NNEWD
|
NWS
|
|
north要orthwestern (weather reports
only) |
NNWRN
|
NWS
|
|
north趴est |
NW
|
ICAO
|
|
Northwest Mountain Region, FAA
|
ANM
|
GEN
|
|
north趴estbound |
NWB
|
ICAO
|
|
northwesterly (weather reports only)
|
NWLY
|
NWS
|
|
northwestern (weather reports only)
|
NWRN
|
NWS
|
|
north趴estward (weather reports only)
|
NNWWD
|
NWS
|
|
not
above |
NAB
|
GEN
|
|
not
according to routine |
NAR
|
GEN
|
|
not
applicable |
N/A
|
GEN
|
|
not
ARTS tracked |
NAT
|
ATC
|
|
not
at present |
NAP
|
GEN
|
|
not
authorized |
NA
|
GEN
|
|
not
available |
NO
|
METAR
|
|
not
before |
NBFR
|
ICAO
|
|
not
for us |
NFU
|
GEN
|
|
not
heard |
NHD
|
ATC
|
|
not
holding |
NOHOL
|
ATC
|
|
not
in system |
NIS
|
GEN
|
|
not
later than |
NLT
|
GEN
|
|
not
to descend below |
NDBLO
|
ATC
|
|
not
to exceed |
NTE
|
GEN
|
|
NOTAM
Office |
NOF
|
GEN
|
|
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
|
SNOWTAM
|
ICAO
|
|
NOTAM
Summary |
NOSUM
|
GEN
|
|
Notice of Proposed Rulemaking
|
NPRM
|
ATC
|
|
Notice to Airmen |
NOTAM
|
GEN
|
|
Notices To Airmen Publication
|
NTAP
|
ATC
|
|
notification of aircraft accident
|
ACCID
|
ATC
|
|
Notify |
NTFY
|
GEN
|
|
Nova
Scotia |
NS
|
NWS
|
|
now
simultaneous |
NOSI
|
GEN
|
|
nuclear detonation |
NUDET
|
GEN
|
|
Number |
NMBR
|
NWS
|
|
Number |
NR
|
GEN
|
|
Numerous |
NMRS
|
GEN
|
