437 / 476
427
A
A/A
Air toAir
AACC
AreaApproachControl Centre
AAD
AssignedAltitudeDeviation
AAIS
AutomaticAerodrome
InformationService
AAL
AboveAerodrome Level
ABI
AdvanceBoundary Information
ABM
Abeam
ABN
AerodromeBeacon
ABT
About
ABV
Above ...
AC
Altocumulus
+ACARS Aircraft Communication
Addressing andReporting
System (pronounced “AY-
CARS”)
+ACAS
AirborneCollisionAvoidance
System
#ACC
AreaControl Centre
ACCID
Initial Notification of anAircraft
Accident
ACD
AirwaysClearanceDelivery
ACFT
Aircraft
ACK
Acknowledge
ACN
Aircraft ClassificationNumber
ACPT
Accept,Accepted
ACT
Active,Activated,Activity
AD
Aerodrome
ADC
AerodromeChart
ADDGM
AerodromeDiagrams
ADDN
Addition,Additional
#ADF
AutomaticDirectionFinding
Equipment
#ADIZ
Air Defence IdentificationZone
ADJ
Adjacent
ADMS Aeronautical Database
Management System
ADR
AdvisoryRoute
#ADS-B AutomaticDependent
Surveillance-Braodcast
abbreviations and acronyms
GENERALANDMETEOROLOGICALABBREVIATIONS
This list covers abbreviationswhichmay be found throughout theGuide and
on associated charts, orwhich are used inNOTAM, AIPSupplements and in
meteorological messages and documentation.
Abbreviationsmarked“+”may be used as spokenwords in radio telephony.
Abbreviations “#”may be spokenusing the constituent letters rather than the
phonetic alphabet.
6 – i ndex
CODE DEFINITION
CODE DEFINITION