|
Contraction
|
Definition
|
Usage
|
|
+FC
|
tornado/water spout
|
METAR
|
|
A
|
absolute (temperature)
|
NWS
|
|
A
|
Alaskan Standard Time (time groups only)
|
NWS
|
|
A
|
amber
|
GEN
|
|
A
|
arctic (air mass)
|
NWS
|
|
A/A
|
air to air
|
ATC
|
|
A/C
|
approach control
|
ATC
|
|
A/G
|
air to ground
|
ATC
|
|
A/H
|
already had
|
ATC
|
|
AAC
|
Alaskan Air Command
|
GEN
|
|
AAD
|
Assigned altitude deviation
|
ICAO
|
|
AADC
|
approach and departure control
|
ATC
|
|
AAF
|
Army Air Field
|
GEN
|
|
AAITVL
|
arrival aircraft interval
|
ATC
|
|
AAL
|
above aerodrome level
|
ICAO
|
|
AAL
|
Alaskan Region, FAA
|
GEN
|
|
AAP
|
advise if able to proceed
|
ATC
|
|
AAR
|
airport arrival rate
|
ATC
|
|
AARTE
|
airport acceptance rate
|
ATC
|
|
AATM
|
at all times
|
GEN
|
|
AAWF
|
Auxiliary Aviation Weather Facility
|
NWS
|
|
AAWTA
|
advise at what time able
|
ICAO
|
|
AB
|
airborne
|
ATC
|
|
ABBR
|
abbreviate
|
GEN
|
|
ABCST
|
automatic broadcast
|
GEN
|
|
ABD
|
aboard
|
GEN
|
|
ABI
|
Advance boundary information
|
ICAO
|
|
ABLCHG
|
airborne launching
|
ATC
|
|
ABM
|
abeam
|
GEN
|
|
ABN
|
aerodrome beacon
|
ICAO
|
|
ABND
|
abandon
|
GEN
|
|
ABNDT
|
abundant
|
GEN
|
|
ABNML
|
abnormal
|
GEN
|
|
ABT
|
about
|
GEN
|
|
ABV
|
above
|
GEN
|
|
AC
|
Advisory Circular
|
GEN
|
|
AC
|
altocumulus
|
NWS
|
|
AC
|
assistant chief
|
GEN
|
|
ACA
|
artic control area
|
ATC
|
|
ACARS
|
Aircraft communication addressing & reporting system
|
ICAO
|
|
ACAS
|
airborne collision avoidance system
|
ICAO
|
|
ACC
|
area control center
|
ATC
|
|
ACCAS
|
altocumulus castellanus
|
NWS
|
|
ACCID
|
notification of aircraft accident
|
ATC
|
|
ACCT
|
account
|
GEN
|
|
ACCUM
|
accumulate
|
GEN
|
|
ACDNT
|
accident
|
GEN
|
|
ACDO
|
Air Carrier District Office
|
GEN
|
|
ACE
|
Central Region, FAA
|
GEN
|
|
ACES
|
access
|
GEN
|
|
ACFT
|
aircraft
|
GEN
|
|
ACID
|
aircraft identification
|
ATC
|
|
ACK
|
acknowledge
|
GEN
|
|
ACL
|
altimeter check location
|
ATC
|
|
ACLD
|
above clouds
|
GEN
|
|
ACLS
|
automatic carrier landing system
|
GEN
|
|
ACLT
|
accelerate
|
GEN
|
|
ACM
|
air combat maneuvers
|
ATC
|
|
ACN
|
aircraft classification number
|
ICAO
|
|
ACN
|
all concerned notified
|
GEN
|
|
ACNOT
|
accident notice
|
GEN
|
|
ACP
|
acceptance (message type designator)
|
ICAO
|
|
ACP
|
area command post
|
GEN
|
|
ACPT
|
accept
|
GEN
|
|
ACPY
|
accompany
|
GEN
|
|
ACR
|
air carrier
|
GEN
|
|
ACRBT
|
acrobatic
|
ATC
|
|
ACRS
|
across
|
GEN
|
|
ACSL
|
standing lenticular altocumulus
|
NWS
|
|
ACT
|
active or activated or activity
|
ICAO
|
|
ACT
|
air combat training
|
ATC
|
|
ACT
|
Technical Center, FAA
|
GEN
|
|
ACTG
|
acting
|
GEN
|
|
ACTV
|
active
|
GEN
|
|
ACTVT
|
activate
|
GEN
|
|
ACW
|
aircraft control and warning
|
GEN
|
|
ACYC
|
anticyclonic
|
NWS
|
|
AD
|
aerodrome
|
ICAO
|
|
ADA
|
advisory area
|
ATC
|
|
ADAP
|
Airport Development Aid Program
|
GEN
|
|
ADC
|
Aerodrome chart
|
ICAO
|
|
ADCF
|
Air Defense Control Facility
|
GEN
|
|
ADCON
|
advise or issue instructions to all concerned
|
GEN
|
|
ADCUS
|
advise customs
|
GEN
|
|
ADDN
|
addition
|
GEN
|
|
ADE
|
Air Defense Emergency
|
GEN
|
|
ADF
|
automatic direction finder
|
GEN
|
|
ADFAP
|
automatic direction finder approach
|
ATC
|
|
ADIZ
|
air defense identification zone
|
GEN
|
|
ADJ
|
adjacent
|
GEN
|
|
ADL
|
aggregate demand list
|
ATC
|
|
ADLO
|
Air Defense Liaison Officer
|
GEN
|
|
ADLY
|
arrival delay
|
ATC
|
|
ADMAP
|
advise by air mail as soon as possible
|
GEN
|
|
ADMIN
|
administration
|
GEN
|
|
ADMIR
|
administrator
|
GEN
|
|
ADMIS
|
aircraft departing at (number of minutes) intervals
|
ATC
|
|
ADMIV
|
administrative
|
GEN
|
|
ADNL TFC
|
additional traffic is
|
ATC
|
|
ADNOK
|
advise if not correct
|
ATC
|
|
ADO
|
Aerodrome office (specify service)
|
ICAO
|
|
ADO
|
Airport District Office
|
GEN
|
|
ADP
|
automatic data processing
|
GEN
|
|
ADPE
|
automatic data processing equipment
|
GEN
|
|
ADPS
|
automatic data processing systems
|
GEN
|
|
ADQT
|
adequate
|
GEN
|
|
ADR
|
advisory route
|
ATC
|
|
ADR
|
airport departure rate
|
ATC
|
|
ADRDE
|
advise reason for delay
|
ATC
|
|
ADRNDCK
|
adirondack
|
NWS
|
|
ADRT
|
alternate departure route
|
ATC
|
|
ADS
|
address
|
GEN
|
|
ADS
|
Air Defense Sector
|
GEN
|
|
ADS
|
automatic dependent surveillance
|
ICAO
|
|
ADSPN
|
advise disposition
|
GEN
|
|
ADSU
|
automatic dependent surveillance unit
|
ICAO
|
|
ADV
|
advise
|
NWS
|
|
ADVALT
|
allotment advice
|
GEN
|
|
ADVC
|
advice
|
GEN
|
|
ADVCTN
|
advection
|
NWS
|
|
ADVN
|
advance
|
GEN
|
|
ADVY
|
advisory
|
NWS
|
|
ADW
|
air defense warning
|
GEN
|
|
ADVZY
|
advisory
|
ATC
|
|
ADZ
|
advise
|
GEN
|
|
ADZAR
|
advise arrival
|
ATC
|
|
ADZI
|
advise intentions
|
ATC
|
|
ADZOF
|
advise this office
|
GEN
|
|
ADZY
|
advisory
|
GEN
|
|
ADZY
|
advisory
|
ATC
|
|
AEA
|
Eastern Region, FAA
|
GEN
|
|
AEM
|
aircraft and engine mechanic
|
GEN
|
|
AENG
|
airways engineer
|
GEN
|
|
AER
|
approach end runway
|
GEN
|
|
AERO
|
aeronautical
|
GEN
|
|
AES
|
aircraft earth station
|
ICAO
|
|
AEU
|
Europe, Africa, and Middle East Office, FAA
|
GEN
|
|
AEVAC
|
air evacuation
|
ATC
|
|
AEW
|
airborne early warning
|
GEN
|
|
AFB
|
Air Force Base
|
GEN
|
|
AFC
|
area forecast center
|
NWS
|
|
AFCT
|
affect
|
GEN
|
|
AFD
|
Airport/Facility Directory
|
GEN
|
|
AFDK
|
after dark
|
NWS
|
|
AFIL
|
filed flight plan in the air
|
GEN
|