Order 7110.65P, Air Traffic Control, with changes

2/17/05Pilot/Controller Glossaryhaving low to medium activity. Flight identificationand altitude may be associated with the display ofsecondary radar targets. The system has the capabilityof communicating with ARTCCs and other ARTS II,IIA, III, and IIIA facilities.b. ARTS IIA. A programmable radar-trackingcomputer subsystem capable of modular expansion.The ARTS IIA detects, tracks, and predicts secondaryradar targets. The targets are displayed by means ofcomputer-generated symbols, ground speed, andflight plan data. Although it does not track primaryradar targets, they are displayed coincident with thesecondary radar as well as the symbols and alphanumerics.The system has the capability of communicatingwith ARTCCs and other ARTS II, IIA, III, andIIIA facilities.c. ARTS III. The Beacon Tracking Level of themodular programmable automated radar terminalsystem in use at medium to high activity terminals.ARTS III detects, tracks, and predicts secondaryradar-derived aircraft targets. These are displayed bymeans of computer-generated symbols and alphanumericcharacters depicting flight identification,aircraft altitude, ground speed, and flight plan data.Although it does not track primary targets, they aredisplayed coincident with the secondary radar as wellas the symbols and alphanumerics. The system hasthe capability of communicating with ARTCCs andother ARTS III facilities.d. ARTS IIIA. The Radar Tracking and BeaconTracking Level (RT&BTL) of the modular,programmable automated radar terminal system.ARTS IIIA detects, tracks, and predicts primary aswell as secondary radar-derived aircraft targets. Thismore sophisticated computer-driven system upgradesthe existing ARTS III system by providingimproved tracking, continuous data recording, andfail-soft capabilities.AUTOMATED TERMINAL TRACKING SYS-TEM (ATTS)− ATTS is used to identify the numeroustracking systems including ARTS IIA, ARTS IIE,ARTS IIIA, ARTS IIIE, STARS, and MEARTS.AUTOMATED UNICOM− Provides completelyautomated weather, radio check capability and airportadvisory information on an Automated UNICOMsystem. These systems offer a variety of features,typically selectable by microphone clicks, on theUNICOM frequency. Availability will be publishedin the Airport/Facility Directory and approach charts.AUTOMATIC ALTITUDE REPORT−(See ALTITUDE READOUT.)AUTOMATIC ALTITUDE REPORTING− Thatfunction of a transponder which responds to Mode Cinterrogations by transmitting the aircraft’s altitudein 100-foot increments.AUTOMATIC CARRIER LANDING SYSTEM−U.S. Navy final approach equipment consisting ofprecision tracking radar coupled to a computer datalink to provide continuous information to the aircraft,monitoring capability to the pilot, and a backupapproach system.AUTOMATIC DEPENDENT SURVEILLANCE(ADS) [ICAO]− A surveillance technique in whichaircraft automatically provide, via a data link, dataderived from on−board navigation and positionfixing systems, including aircraft identification, fourdimensional position and additional data asappropriate.AUTOMATIC DEPENDENT SURVEILLANCE−BROADCAST (ADS-B)− A surveillance system inwhich an aircraft or vehicle to be detected is fittedwith cooperative equipment in the form of a data linktransmitter. The aircraft or vehicle periodicallybroadcasts its GPS−derived position and other informationsuch as velocity over the data link, which isreceived by a ground−based transmitter/receiver(transceiver) for processing and display at an airtraffic control facility.(See GLOBAL POSITIONING SYSTEM.)(See GROUND−BASED TRANSCEIVER.)AUTOMATIC DEPENDENT SURVEILLANCE−CONTRACT (ADS−C)− A data link position reportingsystem, controlled by a ground station, thatestablishes contracts with an aircraft’s avionics thatoccur automatically whenever specific events occur,or specific time intervals are reached.AUTOMATIC DIRECTION FINDER− An aircraftradio navigation system which senses and indicatesthe direction to a L/MF nondirectional radio beacon(NDB) ground transmitter. Direction is indicated tothe pilot as a magnetic bearing or as a relative bearingto the longitudinal axis of the aircraft depending onthe type of indicator installed in the aircraft. In certainapplications, such as military, ADF operations mayPCG A−15