|
Definition
|
Contraction
|
Usage
|
|
1 or 2 octas (eighths) cloud coverage
|
FEW
|
METAR
|
|
abandon
|
ABND
|
GEN
|
|
abbreviate
|
ABBR
|
GEN
|
|
Abbreviated precision approach path
indicator
|
APAPI
|
ICAO
|
|
Abbreviated T visual approach slope
indicator system
|
ATVASIS
|
ICAO
|
|
abeam
|
ABM
|
GEN
|
|
abnormal
|
ABNML
|
GEN
|
|
aboard
|
ABD
|
GEN
|
|
about
|
ABT
|
GEN
|
|
above
|
ABV
|
ICAO
|
|
above aerodrome level
|
AAL
|
ICAO
|
|
above clouds
|
ACLD
|
GEN
|
|
above ground level
|
AGL
|
ICAO
|
|
above mean sea level
|
AMSL
|
GEN
|
|
above mountains
|
MON
|
ICAO
|
|
above sea level
|
ASL
|
GEN
|
|
above transmitted as received
|
ATAR
|
GEN
|
|
absolute (temperature)
|
A
|
NWS
|
|
abundant
|
ABNDT
|
GEN
|
|
accelerate
|
ACLT
|
GEN
|
|
acceleratestop distance available
|
ASDA
|
GEN
|
|
accept
|
ACPT
|
GEN
|
|
acceptance (message type designator)
|
ACP
|
ICAO
|
|
access
|
ACES
|
GEN
|
|
accident
|
ACDNT
|
GEN
|
|
accident notice
|
ACNOT
|
GEN
|
|
accompany
|
ACPY
|
GEN
|
|
account
|
ACCT
|
GEN
|
|
account mechanical
|
AMECH
|
GEN
|
|
account traffic
|
ATFC
|
GEN
|
|
account weather
|
AWX
|
GEN
|
|
accumulate
|
ACCUM
|
GEN
|
|
acknowledge
|
ACK
|
GEN
|
|
acknowledgement of receipt (message
handling)
|
R
|
GEN
|
|
acrobatic
|
ACRBT
|
ATC
|
|
across
|
ACRS
|
GEN
|
|
acting
|
ACTG
|
GEN
|
|
activate
|
ACTVT
|
GEN
|
|
activate IFR flight plan
|
AIFP
|
ATC
|
|
activate VFR flight plan
|
AVFP
|
ATC
|
|
active
|
ACTV
|
GEN
|
|
active or activated or activity
|
ACT
|
ICAO
|
|
actual time of arrival
|
ATA
|
ATC
|
|
actual time of departure
|
ATD
|
ATC
|
|
actual time of penetration
|
ATP
|
ATC
|
|
actual time of release
|
ATRLS
|
ATC
|
|
actual wind factor
|
ALWF
|
NWS
|
|
addition
|
ADDN
|
GEN
|
|
additional traffic is
|
ADNL TFC
|
ATC
|
|
address
|
ADS
|
GEN
|
|
adequate
|
ADQT
|
GEN
|
|
adirondack
|
ADRNDCK
|
NWS
|
|
adjacent
|
ADJ
|
ICAO
|
|
administration
|
ADMIN
|
GEN
|
|
administrative
|
ADMIV
|
GEN
|
|
administrator
|
ADMIR
|
GEN
|
|
advance
|
ADVN
|
GEN
|
|
Advance boundary information
|
ABI
|
ICAO
|
|
Advanced Navigation Routes
|
ANR
|
ATC
|
|
advection
|
ADVCTN
|
NWS
|
|
advice
|
ADVC
|
GEN
|
|
advise
|
ADV
|
NWS
|
|
advise
|
ADZ
|
GEN
|
|
advise arrival
|
ADZAR
|
ATC
|
|
advise at what time able
|
AAWTA
|
ICAO
|
|
advise by air mail as soon as possible
|
ADMAP
|
GEN
|
|
advise customs
|
ADCUS
|
GEN
|
|
advise disposition
|
ADSPN
|
GEN
|
|
advise if able
|
AIA
|
ATC
|
|
advise if able to proceed
|
AAP
|
ATC
|
|
advise if not correct
|
ADNOK
|
ATC
|
|
advise intentions
|
ADZI
|
ATC
|
|
advise or issue instructions to all
concerned
|
ADCON
|
GEN
|
|
advise present position and altitude
|
APPA
|
ATC
|
|
advise reason for delay
|
ADRDE
|
ATC
|
|
advise this office
|
ADZOF
|
GEN
|
|
advise when able
|
AWA
|
ATC
|
|
advise when established
|
AWE
|
ATC
|
|
advisory
|
ADVY
|
NWS
|
|
advisory
|
ADZY
|
GEN
|
|
advisory
|
ADZY
|
ATC
|
|
advisory
|
ADVZY
|
ATC
|
|
advisory area
|
ADA
|
ATC
|
|
Advisory Circular
|
AC
|
GEN
|
|
advisory route
|
ADR
|
ATC
|
|
aerial
|
ARL
|
ATC
|
|
aerodrome
|
AD
|
ICAO
|
|
aerodrome beacon
|
ABN
|
ICAO
|
|
Aerodrome chart
|
ADC
|
ICAO
|
|
aerodrome control tower
|
TWR
|
ICAO
|
|
aerodrome flight information service
|
AFIS
|
ICAO
|
|
aerodrome forecast
|
TAF
|
ICAO
|
|
aerodrome obstacle chart (followed by type &
name/title)
|
AOC
|
ICAO
|
|
Aerodrome office (specify service)
|
ADO
|
ICAO
|
|
aerodrome reference point
|
ARP
|
ICAO
|
|
aerodrome traffic zone
|
ATZ
|
ICAO
|
|
aerodromes, air routes and ground aids
|
AGA
|
ICAO
|
|
aeronautical
|
AERO
|
GEN
|
|
Aeronautical chart 1:500 000 (followed by
name/title)
|
ANC
|
ICAO
|
|
aeronautical fixed service
|
AFS
|
GEN
|
|
Aeronautical Fixed Telecommunications
Network
|
AFTN
|
GEN
|
|
Aeronautical Information Circular
|
AIC
|
GEN
|
|
Aeronautical Information Publication
|
AIP
|
ATC
|
|
aeronautical information publications (In
General)
|
AIP
|
GEN
|
|
aeronautical information regulation and
control
|
AIRAC
|
GEN
|
|
aeronautical information service
|
AIS
|
GEN
|
|
aeronautical information specialist
|
AIS
|
GEN
|
|
aeronautical maps and charts
|
MAP
|
ICAO
|
|
aeronautical mobile satellite service
|
AMSS
|
ICAO
|
|
aeronautical mobile service
|
AMS
|
GEN
|
|
Aeronautical navigation chart small scale
(followed by name/title scale)
|
ANCS
|
ICAO
|
|
Aeronautical Radio, Incorporated
|
ARINC
|
GEN
|
|
Aeronautical Telecommunications Network
|
ATN
|
ICAO
|
|
aeronautical telecommunications operator
|
ATO
|
GEN
|
|
affect
|
AFCT
|
GEN
|
|
affirmative
|
AFIRM
|
GEN
|
|
affirmative
|
AFM
|
ICAO
|
|
After
|
AFT
|
GEN
|
|
after dark
|
AFDK
|
NWS
|
|
after passing
|
APSG
|
ICAO
|
|
Afternoon
|
AFTN
|
GEN
|
|
Again
|
AGN
|
GEN
|
|
Aggregate demand list
|
ADL
|
ATC
|
|
Agree
|
AGR
|
GEN
|
|
agreement
|
AGRMT
|
GEN
|
|
Ahead
|
AHD
|
GEN
|
|
air carrier
|
ACR
|
GEN
|
|
Air Carrier District Office
|
ACDO
|
GEN
|
|
air combat maneuvers
|
ACM
|
ATC
|
|
air combat training
|
ACT
|
ATC
|
|
Air Defense Control Facility
|
ADCF
|
GEN
|
|
Air Defense Emergency
|
ADE
|
GEN
|
|
air defense identification zone
|
ADIZ
|
GEN
|
|
Air Defense Liaison Officer
|
ADLO
|
GEN
|
|
Air Defense Sector
|
ADS
|
GEN
|
|
air defense warning
|
ADW
|
GEN
|
|
air evacuation
|
AEVAC
|
ATC
|
|
air express
|
AXPS
|
GEN
|
|
Air Force Base
|
AFB
|
GEN
|
|
Air Force Communications Network
|
AIRCOMNET
|
GEN
|
|
Air Force Jet
|
AFJ
|
ATC
|
|
Air Force NOTAM Exchange Area
|
AFNEA
|
GEN
|
|
Air Force NOTAM Exchange Office
|
AFNEO
|
GEN
|
|
Air Force overrun 1000ft standard approach
lighting system
|
AFOVRN
|
MIL
|
|
Air Force Representative to the FAA
|
AFREP
|
GEN
|
|
air freight
|
AFRT
|
GEN
|
|
air ground
|
AG
|
ATC
|
|
Air Line Dispatchers Association
|
ALDA
|
GEN
|
|
Air Line Pilots Association
|
ALPA
|
GEN
|
|
air mass
|
AMS
|
NWS
|
|
Air Mobility Command
|
AMC
|
ATC
|
|
Air National Guard
|
ANG
|
GEN
|
|
air navigation facility
|
ANF
|
GEN
|
|
air navigation radio aids
|
ANRA
|
GEN
|
|
air operations network
|
AIROPNET
|
GEN
|
|
air refueling
|
AIRFL
|
ATC
|
|
air refueling control point
|
ARCP
|
ATC
|
|
air refueling egress point
|
AREP
|
ATC
|
|
air refueling exit
|
AREX
|
ATC
|
|
air refueling initial point
|
ARIP
|
ATC
|
|
air report
|
AIREP
|
GEN
|
|
Air Rescue Service (USAF)
|
ARS
|
GEN
|
|
Air Reserve Base
|
ARB
|
GEN
|
|
air route surveillance radar
|
ARSR
|
GEN
|
|
air route traffic control
|
ARTC
|
GEN
|
|
Air Route Traffic Control Center
|
ARTCC
|
GEN
|
|
air to air
|
A/A
|
ATC
|
|
air to ground
|
A/G
|
ATC
|
|
air traffic control
|
ATC
|
ICAO
|
|
Air Traffic Control Association
|
ATCA
|
GEN
|
|
air traffic flow management
|
ATFM
|
ICAO
|
|
air traffic management
|
ATM
|
ICAO
|
|
Air Traffic Organization
|
ATO
|
GEN
|
|
air traffic procedures
|
ATP
|
GEN
|
|
Air Traffic Procedures Advisory Committee
|
ATPAC
|
GEN
|
|
air traffic representative
|
ATREP
|
GEN
|
|
Air Traffic Service Contingency Command Post
|
ATSCCP
|
GEN
|
|
Air traffic services interfacility data
communication
|
AIDC
|
ICAO
|
|
air traffic services reporting office
|
ARO
|
GEN
|
|
Air Transport Association of America
|
ATA
|
GEN
|
|
air transport pulse radar navigation aid
|
CPN
|
GEN
|
|
air transport pulse radar search
|
CPS
|
GEN
|
|
air transport rating
|
ATR
|
GEN
|
|
air weather service (USAF)
|
AWS
|
GEN
|
|
airborne
|
AB
|
ATC
|
|
airborne collision avoidance system
|
ACAS
|
ICAO
|
|
airborne early warning
|
AEW
|
GEN
|
|
airborne launching
|
ABLCHG
|
ATC
|
|
airborne pulse search radar
|
APS
|
GEN
|
|
Airborne Radar Unit
|
ARU
|
GEN
|
|
aircraft
|
ACFT
|
ICAO |
|
aircraft and engine mechanic
|
AEM
|
GEN
|
|
aircraft classification number
|
ACN
|
ICAO
|
|
Aircraft communication addressing &
reporting system
|
ACARS
|
ICAO
|
|
aircraft control and warning
|
ACW
|
GEN
|
|
aircraft departing at (number of minutes)
intervals
|
ADMIS
|
ATC
|
|
aircraft earth station
|
AES
|
ICAO
|
|
aircraft identification
|
ACID
|
ATC
|
|
aircraft movement information services
|
AMIS
|
GEN
|
|
aircraft out of commission for parts
|
AOCP
|
GEN
|
|
Aircraft Owners and Pilots Association
|
AOPA
|
GEN
|
|
Aircraft parking/docking chart (followed by
name/title)
|
APDC
|
ICAO
|
|
aircraft rescue and fire fighting
|
ARFF
|
ATC
|
|
airmail
|
ARML
|
GEN
|
|
Airman’s Information Manual
|
AIM
|
GEN
|
|
Airmen’s Meteorological Information
|
AIRMET
|
GEN
|
|
AIRMET
|
WA
|
NWS
|
|
airport
|
AP
|
ICAO
|
|
airport
|
ARPT
|
GEN
|
|
airport acceptance rate
|
AARTE
|
ATC
|
|
airport arrival rate
|
AAR
|
ATC
|
|
airport departure rate
|
ADR
|
ATC
|
|
Airport Development Aid Program
|
ADAP
|
GEN
|
|
Airport District Office
|
ADO
|
GEN
|
|
airport in sight
|
AIS
|
GEN
|
|
airport information desk
|
AID
|
GEN
|
|
airport layout plan
|
ALP
|
GEN
|
|
airport lights
|
APL
|
GEN
|
|
airport manager
|
AMGR
|
GEN
|
|
airport of entry
|
AOE
|
GEN
|
|
airport operating certificate
|
AOC
|
GEN
|
|
airport radar service area
|
ARSA
|
ATC
|
|
airport reference point
|
ARP
|
GEN
|
|
airport rescue and fire fighting alarm
checked
|
ARFFOK
|
ATC
|
|
airport reservation position
|
ARP
|
GEN
|
|
Airport Reservations Office
|
ARO
|
GEN
|
|
airport surface detection equipment
|
ASDE
|
GEN
|
|
airport surveillance radar
|
ASR
|
GEN
|
|
airport system plan
|
ASP
|
GEN
|
|
Airport Traffic Control Tower
|
ATCT
|
GEN
|
|
Airport/Facility Directory
|
AFD
|
GEN
|
|
airports program report
|
APR
|
GEN
|
|
airreport
|
ARP
|
GEN
|
|
Airspace
|
ASP
|
GEN
|
|
airspace docket
|
ASD
|
GEN
|
|
airspace flight inspection pilot
|
ASIP
|
GEN
|
|
Airspace Reservation Unit (Canadian)
|
ARU
|
GEN
|
|
airway
|
AWY
|
GEN
|
|
airways engineer
|
AENG
|
GEN
|
|
Alaskan Air Command
|
AAC
|
GEN
|
|
Alaskan Region, FAA
|
AAL
|
GEN
|
|
Alaskan Standard Time (time groups only)
|
A
|
NWS
|
|
Alberta
|
ALTA
|
NWS
|
|
alert notice
|
ALNOT
|
GEN
|
|
alert phase code (alerting service)
|
ALERFA
|
ATC
|
|
alerting
|
ALR
|
ICAO
|
|
Aleutian
|
ALUTN
|
NWS
|
|
alighting area
|
ALA
|
GEN
|
|
alignment
|
ALNMT
|
GEN
|
|
all (when used as prefix)
|
AL
|
GEN
|
|
all accident notice offices
|
ALANO
|
GEN
|
|
all air carrier field offices
|
ALACFO
|
GEN
|
|
all air defense liaison officers in service
area |
ALADLO
|
GEN
|
|
all air route traffic control centers in
service area |
ALARTC
|
GEN
|
|
all air traffic (area) supervisors in
service area |
ALATAS
|
GEN
|
|
all air traffic field facilities
|
ALATF
|
GEN
|
|
all air traffic field offices
|
ALATFO
|
GEN
|
|
all air traffic service personnel in service
area |
ALAT
|
GEN
|
|
all technical operations |
ALAFFO
|
GEN
|
|
all air traffic combined station/centers in
service area |
ALCS/C
|
GEN
|
|
all air traffic combined station/towers in
service area
|
ALCS/T
|
GEN
|
|
all ATC towers in service area |
ALTWR
|
GEN
|
|
all concerned notified
|
ACN
|
GEN
|
|
all FAA field offices and personnel
|
ALFAA
|
GEN
|
|
all FAA offices on NADIN
|
ALFAB
|
GEN
|
|
all flight service stations in service area
|
ALFSS
|
GEN
|
|
all flight standards field offices
|
ALFSFO
|
GEN
|
|
all international aeronautical
telecommunication switching centers
|
ALIATSC
|
GEN
|
|
all international air traffic switching
centers
|
AIATSC
|
GEN
|
|
all international field offices
|
ALIFO
|
GEN
|
|
all international flight service stations in
service area
|
ALIFSS
|
GEN
|
|
all offices having sendreceive
teletypewriter service on circuit
|
ALCKT
|
GEN
|
|
all quadrants
|
ALQDS
|
NWS
|
|
all radar ATC facilities in service area
|
ALRAFAC
|
GEN
|
|
all regional/service area offices
|
ALRGN
|
GEN
|
|
all sectors
|
ALSEC
|
NWS
|
|
all technical operations
|
ALAFFO
|
GEN
|
|
all up weight (gross weight)
|
AUW
|
GEN
|
|
all weather landing
|
AWL
|
ATC
|
|
Allegheny
|
ALGHNY
|
NWS
|
|
allotment advice
|
ADVALT
|
GEN
|
|
allowable takeoff gross weight
|
ATOG
|
GEN
|
|
aloft
|
ALF
|
NWS
|
|
along
|
ALG
|
GEN
|
|
already had
|
A/H
|
ATC
|
|
alternate
|
ALTN
|
GEN
|
|
alternate (aerodrome)
|
ALTN
|
ICAO
|
|
alternate airport
|
ALTPT
|
GEN
|
|
alternate departure route
|
ADRT
|
ATC
|
|
altimeter
|
ALTM
|
GEN
|
|
altimeter check location
|
ACL
|
ATC
|
|
altimeter setting
|
ALSTG
|
GEN
|
|
altimeter setting indicator
|
ASI
|
GEN
|
|
altimeter subscale setting to obtain
elevation when on the ground
|
QNH
|
ICAO
|
|
Altimetry system error
|
ASE
|
ICAO
|
|
altitude
|
ALT
|
ICAO
|
|
altitude radial
|
ARAD
|
ATC
|
|
altitude reservation
|
ALTRV
|
GEN
|
|
altitude reservation void for aircraft not
airborne by
|
AVANA
|
ATC
|
|
altocumulus
|
AC
|
NWS
|
|
altocumulus castellanus
|
ACCAS
|
NWS
|
|
altostratus
|
AS
|
NWS
|
|
amber
|
A
|
GEN
|
|
ambiguity
|
AMB
|
GEN
|
|
amend / amended forecast
|
AMD
|
GEN/ |
|
amended clearance
|
AMCL
|
ATC
|
|
amended route of flight
|
AMRF
|
ATC
|
|
amendment
|
AMDT
|
GEN
|
|
American Meteorological Society
|
AMS
|
NWS
|
|
American Telephone and Telegraph Company
|
ATT
|
GEN
|
|
amount
|
AMT
|
GEN
|
|
amplifier or amplify
|
AMP
|
GEN
|
|
amplitude
|
AMPLTD
|
NWS
|
|
analysis
|
ANLYS
|
NWS
|
|
announce
|
ANNC
|
GEN
|
|
annual leave
|
AL
|
GEN
|
|
anomalous propagation
|
AP
|
ATC
|
|
answer
|
ANS
|
GEN
|
|
ante meridiem
|
AM
|
NWS
|
|
antenna
|
ANT
|
GEN
|
|
anticipate
|
ANCPT
|
GEN
|
|
anticyclonic
|
ACYC
|
NWS
|
|
Appalachian
|
APLCN
|
NWS
|
|
apparent
|
APRNT
|
GEN
|
|
appear
|
APPR
|
GEN
|
|
appoint
|
APNT
|
GEN
|
|
approach
|
APCH
|
ICAO
|
|
approach and departure control
|
AADC
|
ATC
|
|
approach control
|
A/C
|
ATC
|
|
approach control or approach control office
|
APP
|
ICAO
|
|
approach end runway
|
AER
|
GEN
|
|
approach light lane
|
YL
|
ATC
|
|
approach light system
|
ALS
|
ICAO
|
|
approach path alignment panel
|
APAP
|
GEN
|
|
Appropriate
|
APROP
|
GEN
|
|
Approval
|
APVL
|
GEN
|
|
approval request
|
APREQ
|
GEN
|
|
approve
|
APV
|
GEN
|
|
approximate
|
APRX
|
GEN
|
|
Apron
|
APN
|
ICAO
|
|
arctic (air mass)
|
A
|
NWS
|
|
area airports checked
|
ARAC
|
ATC
|
|
Area chart
|
ARC
|
ICAO
|
|
area command post
|
ACP
|
GEN
|
|
area control center
|
ACC
|
ATC
|
|
area forecast
|
ARFOR
|
GEN
|
|
area forecast
|
FA
|
NWS
|
|
area forecast center
|
AFC
|
NWS
|
|
area minimum altitude
|
AMA
|
ICAO
|
|
area navigation
|
RNAV
|
ICAO
|
|
area notice
|
ARNOT
|
GEN
|
|
area positive control
|
APC
|
ATC
|
|
Army Air Field
|
AAF
|
GEN
|
|
Army Liaison Officer
|
ARLO
|
GEN
|
|
Army National Guard
|
RNG
|
GEN
|
|
Army radar approach control facility
|
ARAC
|
GEN
|
|
around
|
ARND
|
GEN
|
|
arrange
|
ARNG
|
GEN
|
|
arrest
|
ARST
|
GEN
|
|
arresting gear
|
AGEAR
|
GEN
|
|
arrival aircraft interval
|
AAITVL
|
ATC
|
|
arrival approved request for IFR flight
|
AI
|
ATC
|
|
arrival delay
|
ADLY
|
ATC
|
|
arrival or arrive
|
ARR
|
GEN
|
|
arrival report will be filed with
|
FIRIV
|
ATC
|
|
arrival unknown
|
ARUNK
|
ATC
|
|
artic control area
|
ACA
|
ATC
|
|
as soon as possible
|
ASAP
|
GEN
|
|
as soon as possible
|
SAP
|
ICAO
|
|
ascend
|
ASND
|
GEN
|
|
ascent to
|
ASC
|
GEN
|
|
ASOS automated observation with
precipitation discriminator (rain/snow)
|
AO2
|
NWS
|
|
ASOS automated observation without
precipitation discriminator (rain/snow)
|
AO1
|
METAR
|
|
asphalt
|
ASPH
|
ICAO
|
|
assign
|
ASGN
|
GEN
|
|
Assigned altitude deviation
|
AAD
|
ICAO
|
|
assistant
|
ASST
|
GEN
|
|
assistant chief
|
AC
|
GEN
|
|
associate
|
ASSOC
|
GEN
|
|
assumed
|
ASMD
|
ATC
|
|
at all times
|
AATM
|
GEN
|
|
at and maintain
|
ATAM
|
ATC
|
|
at least (altitude)
|
AL/()
|
ATC
|
|
at or above
|
AOA
|
ATC
|
|
at or after
|
AOAF
|
ATC
|
|
at or before
|
AOBF
|
ATC
|
|
at or below
|
AOB
|
ATC
|
|
at sea
|
MAR
|
ICAO
|
|
at the coast
|
COT
|
ICAO
|
|
at this time
|
ATTM
|
GEN
|
|
ATC advises
|
ATCA
|
ATC
|
|
ATC assigned airspace
|
ATCAA
|
ATC
|
|
ATC beacon interrogator
|
ATCBI
|
GEN
|
|
ATC clears
|
ATCC
|
ATC
|
|
ATC facility
|
ATCF
|
GEN
|
|
ATC operations representative
|
ATCOR
|
GEN
|
|
ATC radar beacon system
|
ATCRBS
|
GEN
|
|
ATC requests
|
ATCR
|
ATC
|
|
ATC specialist
|
ATCS
|
GEN
|
|
ATC tower, approach and departure control
facility
|
TAD
|
ATC
|
|
Atlantic
|
ATLC
|
NWS
|
|
Atlantic Route
|
AR
|
ATC
|
|
atmospheric pressure at airport elevation
|
QFE
|
ICAO
|
|
atmospherics
|
SFERICS
|
NWS
|
|
atmospherics
|
XS
|
ICAO
|
|
ATS/MET reporting point
|
MRP
|
ICAO
|
|
Attach
|
ATCH
|
GEN
|
|
Attempt
|
ATMT
|
GEN
|
|
attempt to contact
|
ATMTC
|
ATC
|
|
attempt to locate
|
ALCT
|
GEN
|
|
Attend
|
ATND
|
GEN
|
|
Attention
|
ATTN
|
GEN
|
|
Aurora Borealis
|
AURBO
|
NWS
|
|
authentication maneuver
|
ATM
|
ATC
|
|
Authority
|
AUTH
|
GEN
|
|
authority granted
|
AUGRA
|
GEN
|
|
authority is requested
|
AUREQ
|
GEN
|
|
authorization for interceptor operations
|
AFIO
|
ATC
|
|
Authorize
|
AUZ
|
GEN
|
|
Authorized
|
AUTH
|
ICAO
|
|
automated flight information service
|
FISA
|
ICAO
|
|
Automated Flight Service Station
|
AFSS
|
GEN
|
|
Automated MutualAssistance Vessel Rescue
System
|
AMVER
|
ATC
|
|
Automated Radar Terminal Systems
|
ARTS
|
GEN
|
|
automated surface observing system
|
ASOS
|
NWS
|
|
Automatic
|
AUTO
|
GEN
|
|
automatic broadcast
|
ABCST
|
GEN
|
|
automatic carrier landing system
|
ACLS
|
GEN
|
|
automatic data processing
|
ADP
|
GEN
|
|
automatic data processing equipment
|
ADPE
|
GEN
|
|
automatic data processing systems
|
ADPS
|
GEN
|
|
automatic dependent surveillance
|
ADS
|
ICAO
|
|
automatic dependent surveillance unit
|
ADSU
|
ICAO
|
|
automatic direction finder
|
ADF
|
GEN
|
|
automatic direction finder approach
|
ADFAP
|
ATC
|
|
automatic error correction equipment
|
ARQ
|
GEN
|
|
automatic ground air/ground communication
system
|
AGACS
|
GEN
|
|
automatic instrument landing system
|
AILS
|
GEN
|
|
Automatic Meteorological Observing System
|
AMOS
|
GEN
|
|
Automatic Network Management System
|
ANMS
|
GEN
|
|
automatic scanning control unit
|
ASCU
|
GEN
|
|
automatic scanning unit out of service
|
SCANO
|
GEN
|
|
automatic scanning unit returned to service
|
SCAOK
|
GEN
|
|
automatic send/receive
|
AS/R
|
GEN
|
|
automatic terminal information service
|
ATIS
|
ICAO |
|
automatic weather broadcast equipment
|
AWBE
|
GEN
|
|
automatic weather observing/reporting system
|
AWOS
|
GEN
|
|
automatic weather reporting system
|
AUTOB
|
GEN
|
|
auxiliary
|
AUX
|
GEN
|
|
Auxiliary Aviation Weather Facility
|
AAWF
|
NWS
|
|
Auxiliary Flight Service Station
|
XFSS
|
ATC
|
|
auxiliary report
|
XREP
|
GEN
|
|
available
|
AVBL
|
ICAO
|
|
average
|
AVG
|
GEN
|
|
aviation
|
AVN
|
GEN
|
|
Aviation Area Forecast Center
|
FA CENTER
|
GEN
|
|
aviation gasoline
|
AVGAS
|
GEN
|
|
aviation routine weather report
|
METAR
|
ICAO
|
|
aviation selected special weather report
|
SPECI
|
METAR
|
|
Aviation Weather and NOTAM System
|
AWANS
|
GEN
|
|
aviation weather processors
|
AWP
|
NWS
|
|
await or awaiting
|
AWT
|
GEN
|
|
azimuth
|
AZM
|
ICAO
|
|
azimuth and range data
|
AZRAN
|
ATC
|
