|
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
|
GEN
|
|
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
|
GEN
|
|
none
|
NIL
|
GEN
|
|
nonpersistent
|
NPRS
|
NWS
|
|
nonprecision
instrument
|
NPI
|
GEN
|
|
nonrevenue
|
NRV
|
GEN
|
|
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
|