Appendix 3. Abbreviations/Acronyms

As used in this manual, the following abbreviations/
acronyms have the meanings indicated.

Abbreviation/ Meaning
Acronym

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

AeroNav . . . . Aeronautical Navigation Products

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
ALD . . . . . . . Available Landing Distance
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/ Meaning
Acronym
ASRS . . . . . . Aviation Safety Reporting System
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
AWSS . . . . . . Automated Weather Sensor 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