|
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
|
ICAO
|
|
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
|
|
ACC
|
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
|
ICAO
|
|
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
|
ICAO
|
|
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
|
airport
departure rate
|
ATC
|
|
ADR
|
advisory
route
|
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
|
|
ADVZY
|
advisory
|
ATC
|
|
ADW
|
air
defense warning
|
GEN
|
|
ADZ
|
advise
|
GEN
|
|
ADZAR
|
advise
arrival
|
ATC
|
|
ADZI
|
advise
intentions
|
ATC
|
|
ADZOF
|
advise
this office
|
GEN
|
|
ADZY
|
advisory
|
ATC
|
|
ADZY
|
advisory
|
GEN
|
|
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
|
|
AFIO
|
authorization
for interceptor operations
|
ATC
|
|
AFIRM
|
affirmative
|
GEN
|
|
AFIS
|
aerodrome
flight information service
|
ICAO
|
|
AFJ
|
Air
Force Jet
|
ATC
|
|
AFM
|
affirmative
|
ICAO
|
|
AFNEA
|
Air
Force NOTAM Exchange Area
|
GEN
|
|
AFNEO
|
Air
Force NOTAM Exchange Office
|
GEN
|
|
AFOVRN
|
Air
Force overrun 1000-ft standard approach lighting system
|
MIL
|
|
AFRCC
|
Air Force Rescue
Coordination Center
|
GEN
|
|
AFREP
|
Air
Force Representative to the FAA
|
GEN
|
|
AFRT
|
air
freight
|
GEN
|
|
AFS
|
aeronautical
fixed service
|
GEN
|
|
AFSS
|
Automated
Flight Service Station
|
GEN
|
|
AFT
|
after
|
GEN
|
|
AFTN
|
Aeronautical
Fixed Telecommunications Network
|
GEN
|
|
AFTN
|
afternoon
|
GEN
|
|
AG
|
air
ground
|
ATC
|
|
AGA
|
aerodromes,
air routes and ground aids
|
ICAO
|
|
AGACS
|
automatic
ground air/ground communication system
|
GEN
|
|
A-GEAR
|
arresting
gear
|
GEN
|
|
AGL
|
above
ground level
|
ICAO
|
|
AGL
|
Great
Lakes Region, FAA
|
GEN
|
|
AGN
|
again
|
GEN
|
|
AGR
|
agree
|
GEN
|
|
AGRMT
|
agreement
|
GEN
|
|
AHD
|
ahead
|
GEN
|
|
AI
|
arrival
approved request for IFR flight
|
ATC
|
|
AIA
|
advise
if able
|
ATC
|
|
AIATSC
|
all
international air traffic switching centers
|
GEN
|
|
AIC
|
Aeronautical
Information Circular
|
GEN
|
|
AID
|
airport
information desk
|
GEN
|
|
AIDC
|
Air traffic
services inter-facility data communication
|
ICAO
|
|
AIFP
|
activate
IFR flight plan
|
ATC
|
|
AILS
|
automatic
instrument landing system
|
GEN
|
|
AIM
|
Airman's
Information Manual
|
GEN
|
|
AIP
|
Aeronautical
Information Publication
|
ATC
|
|
AIP
|
aeronautical
information publications (In General)
|
GEN
|
|
AIRAC
|
aeronautical
information regulation and control
|
GEN
|
|
AIRCOMNET
|
Air
Force Communications Network
|
GEN
|
|
AIREP
|
air
report
|
GEN
|
|
AIRFL
|
air
refueling
|
ATC
|
|
AIRMET
|
Airmen's
Meteorological Information
|
GEN
|
|
AIROPNET
|
air
operations network
|
GEN
|
|
AIS
|
aeronautical
information service
|
GEN
|
|
AIS
|
aeronautical
information specialist
|
GEN
|
|
AIS
|
airport
in sight
|
GEN
|
|
AL
|
all
(when used as prefix)
|
GEN
|
|
AL
|
annual
leave
|
GEN
|
|
AL/(---)
|
at
least (altitude)
|
ATC
|
|
ALA
|
alighting
area
|
GEN
|
|
ALACFO
|
all
air carrier field offices
|
GEN
|
|
ALADLO
|
all
air defense liaison officers in service area
|
GEN
|
|
ALAFFO
|
all
technical operations
|
GEN
|
|
ALANO
|
all
accident notice offices
|
GEN
|
|
ALARTC
|
all
air route traffic control centers in service area
|
GEN
|
|
ALAT
|
all
air traffic service personnel in service area
|
GEN
|
|
ALATAS
|
all
air traffic (area) supervisors in service area
|
GEN
|
|
ALATF
|
all
air traffic field facilities
|
GEN
|
|
ALATFO
|
all
air traffic field offices
|
GEN
|
|
ALCKT
|
all offices
having send-receive teletypewriter service on circuit
|
GEN
|
|
ALCS/C
|
all
air traffic combined station/centers in service area
|
GEN
|
|
ALCS/T
|
All
air traffic combined station/towers in service area
|
GEN
|
|
ALCT
|
attempt
to locate
|
GEN
|
|
ALDA
|
Air
Line Dispatchers Association
|
GEN
|
|
ALERFA
|
alert
phase code (alerting service)
|
ATC
|
|
ALF
|
aloft
|
NWS
|
|
ALFAA
|
all
FAA field offices and personnel
|
GEN
|
|
ALFAB
|
all
FAA offices on NADIN
|
GEN
|
|
ALFSFO
|
all
flight standards field offices
|
GEN
|
|
ALFSS
|
all
flight service stations in service area
|
GEN
|
|
ALG
|
along
|
GEN
|
|
ALGHNY
|
Allegheny
|
NWS
|
|
ALIATSC
|
all
international aeronautical telecommunication switching centers
|
GEN
|
|
ALIFO
|
all
international field offices
|
GEN
|
|
ALIFSS
|
all
international flight service stations in service area
|
GEN
|
|
ALNMT
|
alignment
|
GEN
|
|
ALNOT
|
alert
notice
|
GEN
|
|
ALP
|
airport
layout plan
|
GEN
|
|
ALPA
|
Air
Line Pilots Association
|
GEN
|
|
ALQDS
|
all
quadrants
|
NWS
|
|
ALR
|
alerting
|
ICAO
|
|
ALRAFAC
|
all
radar ATC facilities in service area
|
GEN
|
|
ALRGN
|
all
regional/service area offices
|
GEN
|
|
ALS
|
approach
light system
|
ICAO
|
|
ALSEC
|
all
sectors
|
NWS
|
|
ALSF-1
|
standard
2400' high-intensity approach lighting system with sequenced
flashers (Category I configuration)
|
GEN
|
|
ALSF-2
|
standard
2400' high-intensity approach lighting system with sequenced
flashers (Category II configuration)
|
GEN
|
|
ALSTG
|
altimeter
setting
|
GEN
|
|
ALT
|
altitude
|
ICAO
|
|
ALTA
|
Alberta
|
NWS
|
|
ALTM
|
altimeter
|
GEN
|
|
ALTN
|
alternate
|
GEN
|
|
ALTN
|
alternate
(aerodrome)
|
ICAO
|
|
ALTPT
|
alternate
airport
|
GEN
|
|
ALTRV
|
altitude
reservation
|
GEN
|
|
ALTWR
|
all
ATC towers in service area
|
GEN
|
|
ALUTN
|
Aleutian
|
NWS
|
|
ALWF
|
actual
wind factor
|
NWS
|
|
AM
|
ante
meridiem
|
NWS
|
|
AMA
|
area
minimum altitude
|
ICAO
|
|
AMB
|
ambiguity
|
GEN
|
|
AMC
|
Air
Mobility Command
|
ATC
|
|
AMC
|
Mike
Monroney Aeronautical Center, FAA
|
GEN
|
|
AMCL
|
amended
clearance
|
ATC
|
|
AMD
|
amend
/ amended forecast
|
GEN/
|
|
AMDT
|
amendment
|
GEN
|
|
AMECH
|
account
mechanical
|
GEN
|
|
AMGR
|
airport
manager
|
GEN
|
|
AMIS
|
aircraft
movement information services
|
GEN
|
|
AMOS
|
Automatic
Meteorological Observing System
|
GEN
|
|
AMP
|
Amplifier
or amplify
|
GEN
|
|
AMPLTD
|
amplitude
|
NWS
|
|
AMRF
|
amended
route of flight
|
ATC
|
|
AMS
|
aeronautical
mobile service
|
GEN
|
|
AMS
|
air
mass
|
NWS
|
|
AMS
|
American
Meteorological Society
|
NWS
|
|
AMSL
|
above
mean sea level
|
GEN
|
|
AMSS
|
aeronautical
mobile satellite service
|
ICAO
|
|
AMT
|
Amount
|
GEN
|
|
AMVER
|
Automated
Mutual-Assistance Vessel Rescue System
|
ATC
|
|
ANC
|
Aeronautical
chart 1:500 000 (followed by name/title)
|
ICAO
|
|
ANCPT
|
anticipate
|
GEN
|
|
ANCS
|
Aeronautical
navigation chart small scale (followed by name/title scale)
|
ICAO
|
|
ANE
|
New
England Region, FAA
|
GEN
|
|
ANF
|
air
navigation facility
|
GEN
|
|
ANG
|
Air
National Guard
|
GEN
|
|
ANLYS
|
Analysis
|
NWS
|
|
ANM
|
Northwest
Mountain Region, FAA
|
GEN
|
|
ANMS
|
Automatic
Network Management System
|
GEN
|
|
ANNC
|
announce
|
GEN
|
|
ANR
|
Advanced
Navigation Routes
|
ATC
|
|
ANRA
|
air
navigation radio aids
|
GEN
|
|
ANS
|
answer
|
GEN
|
|
ANT
|
antenna
|
GEN
|
|
AO1
|
ASOS
automated observation without precipitation discriminator
(rain/snow)
|
METAR
|
|
AO2
|
ASOS
automated observation with precipitation discriminator (rain/snow)
|
NWS
|
|
AOA
|
at
or above
|
ATC
|
|
AOAF
|
at
or after
|
ATC
|
|
AOB
|
at
or below
|
ATC
|
|
AOBF
|
at
or before
|
ATC
|
|
AOC
|
aerodrome
obstacle chart (followed by type & name/title)
|
ICAO
|
|
AOC
|
airport
operating certificate
|
GEN
|
|
AOCP
|
aircraft
out of commission for parts
|
GEN
|
|
AOE
|
airport
of entry
|
GEN
|
|
AOPA
|
Aircraft
Owners and Pilots Association
|
GEN
|
|
AP
|
airport
|
ICAO
|
|
AP
|
anomalous
propagation
|
ATC
|
|
APAP
|
approach
path alignment panel
|
GEN
|
|
APAPI
|
Abbreviated
precision approach path indicator
|
ICAO
|
|
APC
|
area
positive control
|
ATC
|
|
APCH
|
approach
|
ICAO
|
|
APDC
|
Aircraft
parking/docking chart (followed by name/title)
|
ICAO
|
|
APL
|
airport
lights
|
GEN
|
|
APLCN
|
Appalachian
|
NWS
|
|
APN
|
Apron
|
ICAO
|
|
APNT
|
appoint
|
GEN
|
|
APP
|
approach
control or approach control office
|
ICAO
|
|
APPA
|
advise
present position and altitude
|
ATC
|
|
APPR
|
appear
|
GEN
|
|
APR
|
airports
program report
|
GEN
|
|
APREQ
|
approval
request
|
GEN
|
|
APRNT
|
apparent
|
GEN
|
|
APROP
|
appropriate
|
GEN
|
|
APRX
|
approximate
|
GEN
|
|
APS
|
airborne
pulse search radar
|
GEN
|
|
APSG
|
after
passing
|
ICAO
|
|
APV
|
approve
|
GEN
|
|
APVL
|
approval
|
GEN
|
|
AR
|
Atlantic
Route
|
ATC
|
|
ARAC
|
area
airports checked
|
ATC
|
|
ARAC
|
Army
radar approach control facility
|
GEN
|
|
ARAD
|
altitude
radial
|
ATC
|
|
ARB
|
Air
Reserve Base
|
GEN
|
|
ARC
|
Area
chart
|
ICAO
|
|
ARCP
|
air
refueling control point
|
ATC
|
|
AREP
|
air refueling
egress point
|
ATC
|
|
AREX
|
air
refueling exit
|
ATC
|
|
ARFF
|
aircraft
rescue and fire fighting
|
ATC
|
|
ARFFOK
|
airport
rescue and fire fighting alarm checked
|
ATC
|
|
ARFOR
|
area
forecast
|
GEN
|
|
ARINC
|
Aeronautical
Radio, Incorporated
|
GEN
|
|
ARIP
|
air
refueling initial point
|
ATC
|
|
ARL
|
Aerial
|
ATC
|
|
ARLO
|
Army
Liaison Officer
|
GEN
|
|
ARMET
|
forecast
upper wind and temperature at specified points
|
GEN
|
|
ARML
|
Airmail
|
GEN
|
|
ARND
|
Around
|
GEN
|
|
ARNG
|
Arrange
|
GEN
|
|
ARNOT
|
area
notice
|
GEN
|
|
ARO
|
air
traffic services reporting office
|
GEN
|
|
ARO
|
Airport
Reservations Office
|
GEN
|
|
ARP
|
aerodrome
reference point
|
ICAO
|
|
ARP
|
airport
reference point
|
GEN
|
|
ARP
|
airport
reservation position
|
GEN
|
|
ARP
|
air-report
|
GEN
|
|
ARPT
|
Airport
|
GEN
|
|
ARQ
|
automatic
error correction equipment
|
GEN
|
|
ARR
|
arrival
or arrive
|
GEN
|
|
ARS
|
Air
Rescue Service (USAF)
|
GEN
|
|
ARS
|
special
air-report
|
GEN
|
|
ARSA
|
airport
radar service area
|
ATC
|
|
ARSR
|
air
route surveillance radar
|
GEN
|
|
ARST
|
arrest
|
GEN
|
|
ARTC
|
air
route traffic control
|
GEN
|
|
ARTCC
|
Air
Route Traffic Control Center
|
GEN
|
|
ARTS
|
Automated
Radar Terminal Systems
|
GEN
|
|
ARU
|
Airborne
Radar Unit
|
GEN
|
|
ARU
|
Airspace
Reservation Unit (Canadian)
|
GEN
|
|
ARUNK
|
arrival
unknown
|
ATC
|
|
AS
|
altostratus
|
NWS
|
|
AS/R
|
automatic
send/receive
|
GEN
|
|
ASAP
|
as
soon as possible
|
GEN
|
|
ASC
|
ascent
to
|
GEN
|
|
ASCU
|
automatic
scanning control unit
|
GEN
|
|
ASD
|
airspace
docket
|
GEN
|
|
ASDA
|
accelerate-stop
distance available
|
GEN
|
|
ASDE
|
airport
surface detection equipment
|
GEN
|
|
ASE
|
Altimetry
system error
|
ICAO
|
|
ASGN
|
assign
|
GEN
|
|
ASI
|
altimeter
setting indicator
|
GEN
|
|
ASIP
|
airspace
flight inspection pilot
|
GEN
|
|
ASL
|
above
sea level
|
GEN
|
|
ASMD
|
assumed
|
ATC
|
|
ASND
|
ascend
|
GEN
|
|
ASO
|
Southern
Region, FAA
|
GEN
|
|
ASOS
|
automated
surface observing system
|
NWS
|
|
ASP
|
airport
system plan
|
GEN
|
|
ASP
|
airspace
|
GEN
|
|
ASPH
|
asphalt
|
ICAO
|
|
ASR
|
airport
surveillance radar
|
GEN
|
|
ASSOC
|
associate
|
GEN
|
|
ASST
|
assistant
|
GEN
|
|
ASW
|
Southwest
Region, FAA
|
GEN
|
|
ATA
|
actual
time of arrival
|
ATC
|
|
ATA
|
Air
Transport Association of America
|
GEN
|
|
ATAM
|
at
and maintain
|
ATC
|
|
ATAR
|
above
transmitted as received
|
GEN
|
|
ATC
|
air
traffic control
|
ICAO
|
|
ATCA
|
Air
Traffic Control Association
|
GEN
|
|
ATCA
|
ATC
advises
|
ATC
|
|
ATCAA
|
ATC
assigned airspace
|
ATC
|
|
ATCBI
|
ATC
beacon interrogator
|
GEN
|
|
ATCC
|
ATC clears
|
ATC
|
|
ATCF
|
ATC
facility
|
GEN
|
|
ATCH
|
attach
|
GEN
|
|
ATCOR
|
ATC
operations representative
|
GEN
|
|
ATCR
|
ATC
requests
|
ATC
|
|
ATCRBS
|
ATC
radar beacon system
|
GEN
|
|
ATCS
|
ATC
specialist
|
GEN
|
|
ATCSCC
|
David
J. Hurley ATC Systems Command Center
|
GEN
|
|
ATCT
|
Airport
Traffic Control Tower
|
GEN
|
|
ATD
|
actual
time of departure
|
ATC
|
|
ATFC
|
account
traffic
|
GEN
|
|
ATFM
|
air
traffic flow management
|
ICAO
|
|
ATIS
|
automatic
terminal information service
|
ICAO
|
|
ATLC
|
Atlantic
|
NWS
|
|
ATM
|
air
traffic management
|
ICAO
|
|
ATM
|
authentication
maneuver
|
ATC
|
|
ATMT
|
attempt
|
GEN
|
|
ATMTC
|
attempt
to contact
|
ATC
|
|
ATN
|
Aeronautical
Telecommunications Network
|
ICAO
|
|
ATND
|
attend
|
GEN
|
|
ATO
|
aeronautical
telecommunications operator
|
GEN
|
|
ATO
|
Air
Traffic Organization
|
GEN
|
|
ATOG
|
allowable
take-off gross weight
|
GEN
|
|
ATP
|
actual
time of penetration
|
ATC
|
|
ATP
|
air
traffic procedures
|
GEN
|
|
ATPAC
|
Air
Traffic Procedures Advisory Committee
|
GEN
|
|
ATR
|
air
transport rating
|
GEN
|
|
ATREP
|
air
traffic representative
|
GEN
|
|
ATRLS
|
actual
time of release
|
ATC
|
|
ATSCCP
|
Air
Traffic Service Contingency Command Post
|
GEN
|
|
ATT
|
American
Telephone and Telegraph Company
|
GEN
|
|
ATTM
|
at
this time
|
GEN
|
|
ATTN
|
attention
|
GEN
|
|
AT-VASIS
|
Abbreviated
T visual approach slope indicator system
|
ICAO
|
|
ATZ
|
aerodrome
traffic zone
|
ICAO
|
|
AUGRA
|
authority
granted
|
GEN
|
|
AURBO
|
Aurora
Borealis
|
NWS
|
|
AUREQ
|
authority
is requested
|
GEN
|
|
AUTH
|
authority
|
GEN
|
|
AUTH
|
authorized
|
ICAO
|
|
AUTO
|
automatic
|
GEN
|
|
AUTOB
|
automatic
weather reporting system
|
GEN
|
|
AUW
|
all
up weight (gross weight)
|
GEN
|
|
AUX
|
auxiliary
|
GEN
|
|
AUZ
|
authorize
|
GEN
|
|
AVANA
|
altitude
reservation void for aircraft not airborne by ---
|
ATC
|
|
AVBL
|
available
|
ICAO
|
|
AVFP
|
activate
VFR flight plan
|
ATC
|
|
AVFPNO
|
pilot
failed to activate VFR/DVFR flight plan
|
ATC
|
|
AVG
|
average
|
GEN
|
|
AVGAS
|
aviation
gasoline
|
GEN
|
|
AVN
|
aviation
|
GEN
|
|
AWA
|
advise
when able
|
ATC
|
|
AWANS
|
Aviation
Weather and NOTAM System
|
GEN
|
|
AWBE
|
automatic
weather broadcast equipment
|
GEN
|
|
AWE
|
advise
when established
|
ATC
|
|
AWL
|
all
weather landing
|
ATC
|
|
AWOS
|
automatic
weather observing/reporting system
|
GEN
|
|
AWP
|
aviation
weather processors
|
NWS
|
|
AWP
|
Western-Pacific
Region, FAA
|
GEN
|
|
AWS
|
air
weather service (USAF)
|
GEN
|
|
AWT
|
await
or awaiting
|
GEN
|
|
AWX
|
account
weather
|
GEN
|
|
AWY
|
airway
|
GEN
|
|
AXPS
|
air
express
|
GEN
|
|
AZM
|
azimuth
|
ICAO
|
|
AZRAN
|
azimuth
and range data
|
ATC
|