|
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 and 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
|