background image Abbreviation/ Acronym Meaning DH Decision Height DME . Distance Measuring Equipment DME/N . Standard DME DME/P . Precision DME DoD . Department of Defense DP Instrument Departure Procedure DPU . Data Processor Unit DRT . Diversion Recovery Tool DRVSM Domestic Reduced Vertical Separation Minimum DVA . Diverse Vector Area DVFR Defense Visual Flight Rules DVRSN Diversion EDCT Expect Departure Clearance Time EFAS En Route Flight Advisory Service EFV . Enhanced Flight Visibility EFVS Enhanced Flight Vision System ELT Emergency Locator Transmitter EMAS . Engineered Materials Arresting System EPE . Estimate of Position Error ESV . Expanded Service Volume ETA . Estimated Time of Arrival ETD . Estimated Time of Departure ETE . Estimated Time En Route EWINS . Enhanced Weather Information System EWR . Newark International Airport FA . Area Forecast FAA . Federal Aviation Administration FAF Final Approach Fix FAWP Final Approach Waypoint FB . Fly - by FCC . Federal Communications Commission FD Flight Director System FDC . Flight Data Center FDE . Fault Detection and Exclusion FIR Flight Information Region FIS Flight Information Service FISDL . Flight Information Services Data Link FLIP . Flight Information Publication FMS . Flight Management System FO Fly - over FPA Flight Path Angle FPV . Flight Path Vector FPNM Feet Per Nautical Mile FRIA FAA - Recognized Identification Area FSDO Flight Standards District Office FSS Flight Service Station Abbreviation/ Acronym Meaning GBAS Ground Based Augmentation System GEO . Geostationary Satellite GLS . GBAS Landing System GNSS Global Navigation Satellite System GNSSP . Global Navigation Satellite System Panel GPS . Global Positioning System GRI Group Repetition Interval GSD . Geographical Situation Display GUS . Ground Uplink Station HAT . Height Above Touchdown HAZMAT . Hazardous Material HDTA High Density Traffic Airports HEMS . Helicopter Emergency Medical Services HIRL High Intensity Runway Lights HRR . Helicopter Rapid Refueling Procedures HUD . Head - Up Display Hz . Hertz IAF Initial Approach Fix IAP Instrument Approach Procedure IAS Indicated Air Speed IAWP Initial Approach Waypoint ICAO International Civil Aviation Organization IF . Intermediate Fix IFR Instrument Flight Rules ILS Instrument Landing System ILS/PRM . Instrument Landing System/Precision Runway Monitor IM . Inner Marker IMC . Instrument Meteorological Conditions InFO . Information For Operators INS Inertial Navigation System IOC Initial Operational Capability IR . IFR Military Training Route IRU Inertial Reference Unit ITWS Integrated Terminal Weather System JFK John F. Kennedy International Airport kHz Kilohertz LAA . Local Airport Advisory LAANC Low Altitude Authorization and Notification Capability LAAS Local Area Augmentation System LAHSO Land and Hold Short Operations LAWRS Limited Aviation Weather Reporting Station LDA . Localizer Type Directional Aid LDA/PRM Localizer Type Directional Aid/Precision Runway Monitor Appendix 3 - Abbreviations/Acronyms