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