Aeronautical Acronyms beginning with A

AC

advisory circular

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ACARS

aircraft communications addressing and reporting system

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ACAS

airborne collision avoidance system

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AD

airworthiness directive

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ADF

automatic direction finder

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ADS

automatic dependent surveillance

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ADS-B

automatic dependent surveillance-broadcast

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AER

approach end of runway

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AFCS

automatic flight control system

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A/FD

airport/facility directory

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AFM

airplane flight manual or aircraft flight manual

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AFSS

Automated Flight Service Station

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AGL

above ground level

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AIM

aeronautical information manual

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AIP

aeronautical information publication

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AIS

airmen's information system

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ALAR

approach and landing accident reduction

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AMASS

airport movement area safety system [delete term]

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ANP

actual navigation performance

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ANR

advanced navigation route

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AOA

airport operating area

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AOCC

airline operations control center

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AOPA

Aircraft Owners and Pilots Association

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AP

autopilot system

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APC

auxiliary performance computer

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APV

approach with vertical guidance

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ARFF

aircraft rescue and fire fighting

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ARINC

aeronautical radio incorporated

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A-RNAV

advanced area navigation

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ARSR

air route surveillance radar

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ARTCC

Air Route Traffic Control Center

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ARTS

Automated Radar Terminal System

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ASDA

accelerate-stop distance available

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ASDAR

aircraft to satellite data relay

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ASDE-3

Airport Surface Detection Equipment-3

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ASDE-X

Airport Surface Detection Equipment-X

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ASOS

automated surface observing system

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ASR

airport surveillance radar

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ATC

air traffic control

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ATCRBS

air traffic control radar beacon system

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ATCS

Air Traffic Control Specialist

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ATCSCC

Air Traffic Control System Command Center

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ATC-TFM

air traffic control traffic flow management

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ATCT

airport traffic control tower

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ATD

along-track distance

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ATIS

automatic terminal information service

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ATM

air traffic management

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ATS

air traffic service

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ATT

attitude retention system

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AVN

Office of Aviation System Standards

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AWOS

automated weather observing system

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AWSS

automated weather sensor system

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