|
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
|
GEN
|
|
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
|
GEN
|
|
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
|
|
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
|