## Appendix B$_{ }$ Acronyms, Abbreviations, and NOTAM Contractions 

This is a list of common acronyms and abbreviations used in the aviation industry as well as NOTAM contractions. For a more complete list of contractions used in aviation, see FAA Order JO 7340.2 (as amended). Additional information regarding NOTAMs can be found at pilotweb.nas.faa.gov/PilotWeb/. 

## A 

A/C —aircraft A/FD —airport/facility directory A/G —air to ground A/HA —altitude/height AAF —Army Air Field AAI  —arrival aircraft interval AAP —advanced automation program AAR —airport acceptance rate ABDIS —Automated Data Interchange System Service B ABN —aerodrome beacon ABV —above ACAIS —air carrier activity information system ACAS —aircraft collision avoidance system ACC —area control center; Airports Consultants Council ACCT —accounting records ACCUM —accumulate ACD —Automatic Call Distributor ACDO —Air Carrier District Office ACF —Area Control Facility ACFO —Aircraft Certification Field Office ACFT —aircraft ACID —aircraft identification ACI-NA —Airports Council International-North America ACIP —airport capital improvement plan ACLS —automatic carrier landing system ACLT —actual landing time calculated ACO —Office of Airports Compliance and Field Operations; Aircraft Certification Office ACR —air carrier ACRP —Airport Cooperative Research Program ACS —Airman Certification Standard ACT —active, activated, or activity ADA —air defense area ADAP —Airport Development Aid Program ADAS —AWOS data acquisition system ADCCP —advanced data communications control procedure ADDA —administrative data ADF —automatic direction finding ADI —automatic de-ice and inhibitor 

ADIN —AUTODIN service ADIZ —air defense identification zone ADJ —adjacent ADL —aeronautical data-link ADLY —arrival delay ADO —airline dispatch office ADP —automated data processing ADS —automatic dependent surveillance ADSIM  —airfield delay simulation model ADSY —administrative equipment systems ADTN —Administrative Data Transmission Network ADTN2000 —Administrative Data Transmission Network 2000 ADVO —administrative voice ADZD —advised AEG —Aircraft Evaluation Group AERA —automated en route air traffic control AEX —automated execution AF —airway facilities AFB —Air Force Base AFIS —automated flight inspection system AFP —area flight plan AFRES —Air Force Reserve Station AFS —airways facilities sector AFSFO —AFS field office AFSFU —AFS field unit AFSOU —AFS field office unit (standard is AFSFOU) AFSS —automated flight service station AFTN —Automated Fixed Telecommunications Network AGIS —airports geographic information system AGL —above ground level AID —airport information desk AIG —Airbus Industries Group AIM —Airman’s Information Manual AlP —airport improvement plan AIRMET —Airmen’s Meteorological Information AIRNET —Airport Network Simulation Model AIS —aeronautical lnformation service AlT —automated information transfer ALP —airport layout plan 

