Appendix B - Acronyms and Abbreviations

GOEST—GOES terminal equipment ID—identification GOVT—government IDAT—interfacility data GP—glide path IDENT—identify/identifier/identification GPRA—Government Performance Results Act IF—intermediate fix GPS—global positioning system IFCP—interfacility communications processor GPWS—ground proximity warning system IFDS—interfacility data system GRADE—graphical airspace design environment IFEA—in-flight emergency assistance GRVL—gravel IFO—International Field Office GS—glide slope indicator IFR—instrument flight rules GSA—General Services Administration IFSS—international flight service station GSE—ground support equipment ILS—instrument landing system IM—inner marker IMC—instrument meteorological conditions H IN—inch/inches H—non-directional radio homing beacon (NDB) INBD—inbound HAA—height above airport INDEFLY—indefinitely HAL—height above landing INFO—information HARS—high altitude route system INM—integrated noise model HAT—height above touchdown INOP—inoperative HAZMAT—hazardous materials INS—inertial navigation system HCAP—high capacity carriers INSTR—instrument HDG—heading INT—intersection HDME—NDB with distance measuring equipment INTL—international HDQ—FAA headquarters INTST—intensity HEL—helicopter IR—ice on runway(s) HELI—heliport IRMP—information resources management plan HF—high frequency ISDN—integrated services digital network HH—NDB, 2kw or more ISMLS—interim standard microwave landing system HI-EFAS—high altitude EFAS ITI—interactive terminal interface HIRL—high intensity runway lights IVRS—interim voice response system HIWAS—Hazardous lnflight Weather Advisory Service IW—inside wiring HLDC—high level data link control HLDG—holding K HOL—holiday Kbps—Kilobits per second HOV—high occupancy vehicle Khz—Kilohertz HP—holding pattern KT—knots HR—hour KVDT—keyboard video display terminal HSI—horizontal situation indicators HUD—housing and urban development L HWAS—hazardous in-flight weather advisory Hz—Hertz L—left LAA—local airport advisory I LAAS—low altitude alert system LABS—leased A B service I/AFSS—international AFSS LABSC—LABS GS-200 computer IA—indirect access LABSR—LABS remote equipment IAF—initial approach fix LABSW—LABS switch system IAP—instrument approach procedures LAHSO—land and hold short operation IAPA—instrument approach procedures automation LAN—local area network IBM—International Business Machines LAT—latitude IBP—international boundary point LATA—local access and transport area IBR—intermediate bit rate LAWRS—limited aviation weather reporting station ICAO—International Civil Aviation Organization LB—pound/pounds ICSS—international communications switching systems B-6