Appendix 3. Abbreviations/Acronyms

10/12/17 AIM Appendix 3. Abbreviations/Acronyms As used in this manual, the following abbreviations/ acronyms have the meanings indicated. Abbreviation/ Acronym Meaning AAWU . . . AAS . . . AC . . . ACAR . . . Alaskan Aviation Weather Unit Airport Advisory Service Advisory Circular Aircraft Communications Addressing and Reporting System ADCUS . . . ADDS . . . ADF . . . ADIZ . . . ADS−B . . . Advise Customs Aviation Digital Data Service Automatic Direction Finder Air Defense Identification Zone Automatic Dependent Surveillance−Broadcast AFB . . . AFCS . . . AFIS . . . AFM . . . AGL . . . AHRS . . . AIM . . . AIRMET . . . AIS . . . ALD . . . ALDARS . . . Air Force Base Automatic Flight Control System Automatic Flight Information Service Aircraft Flight Manual Above Ground Level Attitude Heading Reference System Aeronautical Information Manual Airmen’s Meteorological Information Aeronautical Information Services Available Landing Distance Automated Lightning Detection and Reporting System ALS . . . AMSL . . . ANP . . . AOCC . . . AP . . . APV . . . Approach Light Systems Above Mean Sea Level Actual Navigation Performance Airline Operations Control Center Autopilot System Approach with Vertical Guidance AR . . . ARENA . . . ARFF IC . . . Authorization Required Areas Noted for Attention Aircraft Rescue and Fire Fighting Incident Commander ARINC . . . ARO . . . ARSA . . . ARSR . . . ARTCC . . . ARTS . . . ASDE−X . . . Aeronautical Radio Incorporated Airport Reservations Office Airport Radar Service Area Air Route Surveillance Radar Air Route Traffic Control Center Automated Radar Terminal System Airport Surface Detection Equipment − Model X ASOS . . . ASR . . . Automated Surface Observing System Airport Surveillance Radar Abbreviations/Acronyms Abbreviation/ Acronym Meaning ASRS . . . ASSC ATC . . . Aviation Safety Reporting System Airport Surface Surveillance Capability Air Traffic Control ATCRBS . . . ATCSCC . . . Air Traffic Control Radar Beacon System Air Traffic Control System Command Center ATCT . . . ATD . . . ATIS . . . ATT . . . AWC . . . AWOS . . . AWSS . . . AWTT . . . AWW . . . Airport Traffic Control Tower Along−Track Distance Automatic Terminal Information Service Attitude Retention System Aviation Weather Center Automated Weather Observing System Automated Weather Sensor System Aviation Weather Technology Transfer Severe Weather Forecast Alert BAASS . . . Bigelow Aerospace Advanced Space Studies BBS . . . BC . . . BECMG . . . Bulletin Board System Back Course Becoming group C/A . . . CARTS . . . Coarse Acquisition Common Automated Radar Terminal System (ARTS) (to include ARTS IIIE and ARTS IIE) Clear Air Turbulence Controller Display Course Deviation Indicator Coded Departure Route Combined Center/RAPCON Controlled Firing Area Controlled Flight into Terrain Code of Federal Regulations Certificate of Waiver or Authorization Controller Pilot Data Link Communications CAT . . . CD . . . CDI . . . CDR . . . CERAP . . . CFA . . . CFIT . . . CFR . . . COA . . . CPDLC . . . CTAF . . . CVFP . . . CVRS . . . CWA . . . CWSU . . . Common Traffic Advisory Frequency Charted Visual Flight Procedure Computerized Voice Reservation System Center Weather Advisory Center Weather Service Unit DA . . . DCA . . . Decision Altitude Ronald Reagan Washington National Airport DCP . . . DER . . . Data Collection Package Departure End of Runway Appendix 3−1 AIM Abbreviation/ Acronym 10/12/17 Meaning Abbreviation/ Acronym Meaning DH . . . DME . . . DME/N . . . DME/P . . . DOD . . . DP . . . DPU . . . DRT . . . DRVSM . . . Decision Height Distance Measuring Equipment Standard DME Precision DME Department of Defense Instrument Departure Procedure Data Processor Unit Diversion Recovery Tool Domestic Reduced Vertical Separation Minimum FSS . . . Flight Service Station DUATS . . . DVA . . . DVFR . . . DVRSN . . . Direct User Access Terminal System Diverse Vector Area Defense Visual Flight Rules Diversion GBAS . . . GEO . . . GLS . . . GNSS . . . GNSSP . . . GPS . . . GRI . . . GSD . . . GUS . . . Ground Based Augmentation System Geostationary Satellite GBAS Landing System Global Navigation Satellite System Global Navigation Satellite System Panel Global Positioning System Group Repetition Interval Geographical Situation Display Ground Uplink Station EDCT . . . EFAS . . . EFV . . . EFVS . . . ELT . . . EMAS . . . EPE . . . ESV . . . ETA . . . ETD . . . ETE . . . EWINS . . . EWR . . . Expect Departure Clearance Time En Route Flight Advisory Service Enhanced Flight Visibility Enhanced Flight Vision System Emergency Locator Transmitter Engineered Materials Arresting System Estimate of Position Error Expanded Service Volume Estimated Time of Arrival Estimated Time of Departure Estimated Time En Route Enhanced Weather Information System Newark International Airport HAT . . . HDTA . . . HEMS . . . HIRL . . . HIWAS . . . Height Above Touchdown High Density Traffic Airports Helicopter Emergency Medical Services High Intensity Runway Lights Hazardous Inflight Weather Advisory Service HRR . . . HUD . . . Hz . . . Helicopter Rapid Refueling Procedures Head−Up Display Hertz FA . . . FAA . . . FAF . . . FAROS . . . FAWP . . . FB . . . FCC . . . FD . . . FDC . . . FDE . . . FIR . . . FIS . . . FISDL . . . FLIP . . . FMS . . . FO . . . FPA . . . FPV . . . FPNM . . . FSDO . . . Area Forecast Federal Aviation Administration Final Approach Fix Final Approach Runway Occupancy Signal Final Approach Waypoint Fly−by Federal Communications Commission Flight Director System Flight Data Center Fault Detection and Exclusion Flight Information Region Flight Information Service Flight Information Services Data Link Flight Information Publication Flight Management System Fly−over Flight Path Angle Flight Path Vector Feet Per Nautical Mile Flight Standards District Office IAF . . . IAP . . . IAS . . . IAWP . . . ICAO . . . IF . . . IFIM . . . IFR . . . ILS . . . ILS/PRM . . . Initial Approach Fix Instrument Approach Procedure Indicated Air Speed Initial Approach Waypoint International Civil Aviation Organization Intermediate Fix International Flight Information Manual Instrument Flight Rules Instrument Landing System Instrument Landing System/Precision Runway Monitor IM . . . IMC . . . InFO . . . INS . . . IOC . . . IR . . . IRU . . . ITWS . . . Inner Marker Instrument Meteorological Conditions Information For Operators Inertial Navigation System Initial Operational Capability IFR Military Training Route Inertial Reference Unit Integrated Terminal Weather System JFK . . . John F. Kennedy International Airport kHz . . . Kilohertz LAA . . . LAAS . . . LAHSO . . . LAWRS . . . Local Airport Advisory Local Area Augmentation System Land and Hold Short Operations Limited Aviation Weather Reporting Station LDA . . . Localizer Type Directional Aid Appendix 3−2 Abbreviations/Acronyms 10/12/17 AIM Abbreviation/ Acronym Meaning LDA/PRM . . Localizer Type Directional Aid/Precision Runway Monitor LGA . . . LIRL . . . LLWAS . . . LLWAS NE . LaGuardia Airport Low Intensity Runway Lights Low Level Wind Shear Alert System Low Level Wind Shear Alert System Network Expansion LLWAS−RS . Low Level Wind Shear Alert System Relocation/Sustainment LNAV . . . LOC . . . LOP . . . LORAN . . . LP . . . LPV . . . Lateral Navigation Localizer Line−of−position Long Range Navigation System Localizer Performance Localizer Performance with Vertical Guidance LUAW . . . LZ . . . Line Up and Wait Landing Zone MAHWP . . . MAP . . . MAWP . . . MDA . . . MEA . . . MEARTS . . . Missed Approach Holding Waypoint Missed Approach Point Missed Approach Waypoint Minimum Descent Altitude Minimum En Route Altitude Micro En Route Automated Radar Tracking System Aviation Routine Weather Report Megahertz Medium Intensity Runway Lights Middle Marker Military Operations Area Minimum Obstruction Clearance Altitude Minimum Reception Altitude Magnetic Reference Bearing Minimum Safe Altitude Minimum Safe Altitude Warning Mean Sea Level Moving Target Indicator Mountain Obscuration Military Training Route Minimum Vectoring Altitude Mountain Wave Activity Meteorological Watch Office National Airspace System National Aeronautics and Space Administration METAR . . . MHz . . . MIRL . . . MM . . . MOA . . . MOCA . . . MRA . . . MRB . . . MSA . . . MSAW . . . MSL . . . MTI . . . MTOS . . . MTR . . . MVA . . . MWA . . . MWO . . . NAS . . . NASA . . . NAVAID . . . NAVCEN . . . NCWF . . . Navigational Aid Coast Guard Navigation Center National Convective Weather Forecast Abbreviations/Acronyms Abbreviation/ Acronym Meaning NDB . . . NEXRAD . . . NFDC . . . NGA . . . NM . . . NMAC . . . NOAA . . . Nondirectional Radio Beacon Next Generation Weather Radar National Flight Data Center National Geospatial−Intelligence Agency Nautical Mile Near Midair Collision National Oceanic and Atmospheric Administration NOPAC . . . NoPT . . . NOTAM . . . NPA . . . NRS . . . NSA . . . NSW . . . NTAP . . . NTSB . . . NTZ . . . NWS . . . North Pacific No Procedure Turn Required Notice to Airmen Nonprecision Approach Navigation Reference System National Security Area No Significant Weather Notices to Airmen Publication National Transportation Safety Board No Transgression Zone National Weather Service OAT . . . OBS . . . ODP . . . OIS . . . OIS . . . OM . . . ORD . . . Outside Air Temperature Omni−bearing Selector Obstacle Departure Procedure Operational Information System Obstacle Identification Surface Outer Marker Chicago O’Hare International Airport PA . . . PAPI . . . PAR . . . PAR . . . PC . . . P/CG . . . PDC . . . PFD . . . PinS . . . PIREP . . . POB . . . POFZ . . . POI . . . PPS . . . PRM . . . PT . . . Precision Approach Precision Approach Path Indicator Precision Approach Radar Preferred Arrival Route Personal Computer Pilot/Controller Glossary Pre−departure Clearance Personal Flotation Device Point−in−Space Pilot Weather Report Persons on Board Precision Obstacle Free Zone Principal Operations Inspector Precise Positioning Service Precision Runway Monitor Procedure Turn QICP . . . Qualified Internet Communications Provider RA . . . RAA . . . RAIM . . . Resolution Advisory Remote Advisory Airport Receiver Autonomous Integrity Monitoring Appendix 3−3 AIM Abbreviation/ Acronym 10/12/17 Meaning RAIS . . . RBDT . . . RCAG . . . RCC . . . RCLS . . . RCO . . . RD . . . REIL . . . REL . . . RFM . . . RIL . . . RLIM . . . RMI . . . RNAV . . . RNP . . . ROC . . . RPAT . . . Remote Airport Information Service Ribbon Display Terminals Remote Center Air/Ground Rescue Coordination Center Runway Centerline Lighting System Remote Communications Outlet Rotor Diameter Runway End Identifier Lights Runway Entrance Lights Rotorcraft Flight Manual Runway Intersection Lights Runway Light Intensity Monitor Radio Magnetic Indicator Area Navigation Required Navigation Performance Required Obstacle Clearance RNP Parallel Approach Runway Transitions RVR . . . RVSM . . . RWSL . . . SAFO . . . SAM . . . SAR . . . SAS . . . SATR . . . SBAS . . . SCAT−1 DGPS . . . Runway Visual Range Reduced Vertical Separation Minimum Runway Status Light Safety Alerts For Operators System Area Monitor Search and Rescue Stability Augmentation System Special Air Traffic Rules Satellite−based Augmentation System SDF . . . SFL . . . SFR . . . SFRA . . . SIAP . . . SID . . . SIGMET . . . SM . . . SMGCS . . . Simplified Directional Facility Sequenced Flashing Lights Special Flight Rules Special Flight Rules Area Standard Instrument Approach Procedure Standard Instrument Departure Significant Meteorological Information Statute Mile Surface Movement Guidance Control System SNR . . . SOIA . . . Signal−to−noise Ratio Simultaneous Offset Instrument Approaches SOP . . . SPC . . . SPS . . . STAR . . . STARS . . . Standard Operating Procedure Storm Prediction Center Standard Positioning Service Standard Terminal Arrival Standard Terminal Automation Replacement System Appendix 3−4 Special Category I Differential GPS Abbreviation/ Acronym Meaning STMP . . . Special Traffic Management Program TA . . . TAA . . . TAC . . . TACAN . . . TAF . . . TAS . . . TCAS . . . Traffic Advisory Terminal Arrival Area Terminal Area Chart Tactical Air Navigation Aerodrome Forecast True Air Speed Traffic Alert and Collision Avoidance System TCH . . . TD . . . TDLS . . . TDWR . . . TDZ . . . TDZE . . . TDZL . . . TEC . . . THL . . . TIBS . . . TIS . . . TIS−B . . . TLS . . . TPP . . . TRSA . . . TSO . . . TWEB . . . TWIB . . . Threshold Crossing Height Time Difference Tower Data Link System Terminal Doppler Weather Radar Touchdown Zone Touchdown Zone Elevation Touchdown Zone Lights Tower En Route Control Takeoff Hold Lights Telephone Information Briefing Service Traffic Information Service Traffic Information Service−Broadcast Transponder Landing System Terminal Procedures Publications Terminal Radar Service Area Technical Standard Order Transcribed Weather Broadcast Terminal Weather Information for Pilots System UA . . . UAS . . . UAV . . . UFO . . . UHF . . . U.S. . . USCG . . . UTC . . . UWS . . . Unmanned Aircraft Unmanned Aircraft System Unmanned Aerial Vehicle Unidentified Flying Object Ultrahigh Frequency United States United States Coast Guard Coordinated Universal Time Urgent Weather SIGMET VAR . . . VASI . . . VCOA . . . VDA . . . VDP . . . VFR . . . VGSI . . . VHF . . . VIP . . . VMC . . . Volcanic Activity Reporting Visual Approach Slope Indicator Visual Climb Over the Airport Vertical Descent Angle Visual Descent Point Visual Flight Rules Visual Glide Slope Indicator Very High Frequency Video Integrator Processor Visual Meteorological Conditions Abbreviations/Acronyms 10/12/17 AIM Abbreviation/ Acronym Meaning Abbreviation/ Acronym Meaning VMINI . . . Instrument flight minimum speed, utilized in complying with minimum limit speed requirements for instrument flight Vertical Navigation Never exceed speed Instrument flight never exceed speed, utilized instead of VNE for compliance with maximum limit speed requirements for instrument flight VVI . . . VY . . . VYI . . . Vertical Velocity Indicator Speed for best rate of climb Instrument climb speed, utilized instead of VY for compliance with the climb requirements for instrument flight WA . . . WAAS . . . WFO . . . WGS−84 . . . WMO . . . WMS . . WMSC . . . WMSCR . . . AIRMET Wide Area Augmentation System Weather Forecast Office World Geodetic System of 1984 World Meteorological Organization Wide−Area Master Station Weather Message Switching Center Weather Message Switching Center Replacement WP . . . WRA . . . WRS . . . WS . . . WSO . . . WSP . . . WST . . . Waypoint Weather Reconnaissance Area Wide−Area Ground Reference Station SIGMET Weather Service Office Weather System Processor Convective Significant Meteorological Information WW . . . Severe Weather Watch Bulletin VNAV . . . VNE . . . VNEI . . . VOR . . . Very High Frequency Omni−directional Range VORTAC . . . VHF Omni−directional Range/Tactical Air Navigation VOT . . . VR . . . VREF . . . VOR Test Facility VFR Military Training Route The reference landing approach speed, usually about 1.3 times Vso plus 50 percent of the wind gust speed in excess of the mean wind speed. VSO . . . The stalling speed or the minimum steady flight speed in the landing configuration at maximum weight. Vector to Final Vertical Visibility VTF . . . VV . . . Abbreviations/Acronyms Appendix 3−5