AIM
8/15/19
Appendix 3
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1
Abbreviations/Acronyms
Appendix 3. Abbreviations/Acronyms
As used in this manual, the following abbreviations/
acronyms have the meanings indicated.
Abbreviation/
Acronym
Meaning
AAWU . . . . .
Alaskan Aviation Weather Unit
AAS . . . . . . .
Airport Advisory Service
AC . . . . . . . .
Advisory Circular
ACAR . . . . .
Aircraft Communications Addressing and
Reporting System
ADCUS . . . .
Advise Customs
ADDS . . . . . .
Aviation Digital Data Service
ADF . . . . . . .
Automatic Direction Finder
ADIZ . . . . . .
Air Defense Identification Zone
ADS
−
B . . . . .
Automatic Dependent
Surveillance
−
Broadcast
AFB . . . . . . .
Air Force Base
AFCS . . . . . .
Automatic Flight Control System
AFIS . . . . . . .
Automatic Flight Information Service
AFM . . . . . . .
Aircraft Flight Manual
AGL . . . . . . .
Above Ground Level
AHRS . . . . . .
Attitude Heading Reference System
AIM . . . . . . .
Aeronautical Information Manual
AIRMET . . .
Airmen’s Meteorological Information
AIS . . . . . . . .
Aeronautical Information Services
ALD . . . . . . .
Available Landing Distance
ALDARS . . .
Automated Lightning Detection and
Reporting System
ALS . . . . . . .
Approach Light Systems
AMSL . . . . .
Above Mean Sea Level
ANP . . . . . . .
Actual Navigation Performance
AOCC . . . . .
Airline Operations Control Center
AP . . . . . . . .
Autopilot System
APV . . . . . . .
Approach with Vertical Guidance
AR . . . . . . . .
Authorization Required
ARENA . . . .
Areas Noted for Attention
ARFF IC . . . .
Aircraft Rescue and Fire Fighting Incident
Commander
ARINC . . . . .
Aeronautical Radio Incorporated
ARO . . . . . . .
Airport Reservations Office
ARSA . . . . . .
Airport Radar Service Area
ARSR . . . . . .
Air Route Surveillance Radar
ARTCC . . . . .
Air Route Traffic Control Center
ARTS . . . . . .
Automated Radar Terminal System
ASDE
−
X . . .
Airport Surface Detection Equipment
−
Model X
ASOS . . . . . .
Automated Surface Observing System
ASR . . . . . . .
Airport Surveillance Radar
Abbreviation/
Acronym
Meaning
ASRS . . . . . .
Aviation Safety Reporting System
ASSC
Airport Surface Surveillance Capability
ATC . . . . . . .
Air Traffic Control
ATCRBS . . . .
Air Traffic Control Radar Beacon System
ATCSCC . . . .
Air Traffic Control System Command
Center
ATCT . . . . . .
Airport Traffic Control Tower
ATD . . . . . . .
Along
−
Track Distance
ATIS . . . . . . .
Automatic Terminal Information Service
ATT . . . . . . .
Attitude Retention System
AWC . . . . . . .
Aviation Weather Center
AWOS . . . . .
Automated Weather Observing System
AWTT . . . . .
Aviation Weather Technology Transfer
AWW . . . . . .
Severe Weather Forecast Alert
BAASS . . . . .
Bigelow Aerospace Advanced Space
Studies
BBS . . . . . . .
Bulletin Board System
BC . . . . . . . .
Back Course
BECMG . . . .
Becoming group
C/A . . . . . . . .
Coarse Acquisition
CARTS . . . . .
Common Automated Radar Terminal
System (ARTS) (to include ARTS IIIE and
ARTS IIE)
CAT . . . . . . .
Clear Air Turbulence
CD . . . . . . . .
Controller Display
CDI . . . . . . . .
Course Deviation Indicator
CDR . . . . . . .
Coded Departure Route
CERAP . . . . .
Combined Center/RAPCON
CFA . . . . . . .
Controlled Firing Area
CFIT . . . . . . .
Controlled Flight into Terrain
CFR . . . . . . .
Code of Federal Regulations
COA . . . . . . .
Certificate of Waiver or Authorization
CPDLC . . . . .
Controller Pilot Data Link
Communications
CTAF . . . . . .
Common Traffic Advisory Frequency
CVFP . . . . . .
Charted Visual Flight Procedure
CVRS . . . . . .
Computerized Voice Reservation System
CWA . . . . . . .
Center Weather Advisory
CWSU . . . . .
Center Weather Service Unit
DA . . . . . . . .
Decision Altitude
DCA . . . . . . .
Ronald Reagan Washington National
Airport
DCP . . . . . . .
Data Collection Package
DER . . . . . . .
Departure End of Runway
DH . . . . . . . .
Decision Height