433 abbreviations
Abbreviation Meaning
A/P Autopilot
ABAS Aircraft-Based Augmentation System
ACARS Aircraft Communications Addressing and Reporting System
ACAS Airborne Collision Avoidance System
ACC Area Control Centre
ACMS Aircraft Condition Monitoring System
ACP Audio Control Panel
ACS Audio Control System
ADAHRS Air Data And Attitude Heading Reference System
ADC Air data computer
ADF Automatic direction finder
ADI Attitude director indicator
ADIRS Air Data Inertial Reference System
ADIRU Air data inertial reference unit
ADM Air data module
ADS Either; Automatic Dependent Surveillance or air data system
ADS-A Automatic Dependent Surveillance-Address
ADS-B Automatic Dependent Surveillance-Broadcast
AFCS Automatic flight control system
AFD Autopilot flight director
AFDC Autopilot flight director computer
AFDS Autopilot flight director system
AFIS Either; Automatic flight information service or airborne flight information system
AGACS Automatic ground–air communications system, is also known as ATCSS or data link
AGC Automatic gain control
AGDL Air-Ground Data Link
AHC Attitude Heading Control
AHRS Attitude and Heading Reference Systems
AIDS Aircraft Integrated Data System
AIXM Aeronautical Information eXchange Model
ALC Automatic Level Control
ALT Either; altimeter or altitude
ALT Hold Altitude Hold Mode
ALTS Altitude Select
AMLCD Active-matrix liquid crystal display
AMS Air Management System
ANC Active Noise Cancellation
ANN Annunciator – caution warning system normally containing visual and audio alerts to the pilot
ANR Active Noise Reduction
ANT Antenna
AOC Aeronautical Operational Control
AOP Airport Operating Plan
APC Auto Pilot Computer
APM Aircraft Personality Module
APS Auto Pilot System
APU Auxiliary Power Unit
ARINC Aeronautical Radio, Incorporated
ASD Aircraft situation display
ASDL Aeronautical satellite data link
ASR Airport surveillance radar