Appendix C C-7 Acronym Meaning ATC Air Traffic Control ATCT Airport Traffic Control Tower ATS Air Traffic Service AWOS Automated Weather Observing System baro-VNAV Barometric Vertical Navigation CA Course to Altitude CDI Course Deviation Indicator CDU Control Display Unit CF Course to Fix CFR Code of Federal Regulations CMO Certificate Management Office CPDLC Controller-Pilot Data Link Communication CTA Control Area CTA/FIR Control Area/Flight Information Region DA Decision Altitude DF Direct to Fix DME Distance Measuring Equipment DP Departure Procedure DPA Decision Point Altitude DTK Desired Track EHSI Electronic Horizontal-Situation Indicator EPU Estimate of Position Uncertainty ESV Expanded Service Volume FA Fix to an Altitude FAA Federal Aviation Administration
Appendix C C-8 Acronym Meaning FAF Final Approach Fix FAP Final Approach Point FAS Final Approach Segment FDE Fault Detection and Exclusion FGS Flight Guidance System FIR Flight Information Region FLIP U.S. Flight Information Publication FM Fix to Manual Termination FMS Flight Management System FOG Flight Operations Group FOV Field of View FPAG Flight Procedures and Airspace Group FRT Fixed Radius Transition FSS Flight Service Station FTE Flight Technical Error GLS GNSS Landing System GNSS Global Navigation Satellite System GPS Global Positioning System HAA Helicopter Air Ambulance HBAT Flight Standards Handbook Bulletin for Air T t ti HEDA Helicopter En Route Descent Area HSI Horizontal Situation Indicator IAF Initial Approach Fix IAP Instrument Approach Procedure ICAO International Civil Aviation Organization
Appendix C C-9 Acronym Meaning IF Intermediate Approach Fix IFR Instrument Flight Rules ILS Instrument Landing System IMC Instrument Meteorological Conditions IRS Inertial Reference System IRU Inertial Reference Unit ISA International Standard Atmosphere LAWRS Limited Aviation Weather Reporting System LNAV Lateral Navigation LOA Letter of Authorization LOC Localizer LP Localizer Performance Without Vertical Guidance LPV Localizer Performance With Vertical Guidance LRNS Long-Range Navigation System MAP Missed Approach Point MDA Minimum Descent Altitude MDH Minimum Descent Height MEA Minimum En Route Altitude MEL Minimum Equipment List METAR Aviation Routine Weather Report MIA Minimum IFR Altitude MOPS Minimum Operational Performance Standards MSL Mean Sea Level MSpec Management Specification NANU Notice Advisory to Navstar Users
Appendix C C-10 Acronym Meaning NAS U.S. National Airspace System NASA National Aeronautics and Space Administration NAVAID Navigational Aid NDB Nondirectional Radio Beacon NM Nautical Miles NOTAM Notice to Airmen NSE Navigation System Error NWS National Weather Service ODP Obstacle Departure Procedure OEM Original Equipment Manufacturer OpSpec Operations Specification OSAP Offshore Standard Instrument Operation PBN Performance-Based Navigation PDE Path Definition Error PEE Position Estimation Error PF Pilot Flying PFD Primary Flight Display PI Principal Inspector PIC Pilot in Command PinS Point in Space PM Pilot Monitoring POH Pilot’s Operating Handbook POI Principal Operations Inspector PSE Path Steering Error RA Radio Altitude
Appendix C C-11 Acronym Meaning RAIM Receiver Autonomous Integrity Monitoring RASS Remote Altimeter Setting Source RF Radius to Fix RFM Rotorcraft Flight Manual RNAV Area Navigation RNP Required Navigation Performance RNP AR Required Navigation Performance Authorization R id ROC Required Obstruction Clearance rpm Revolutions per Minute SAO Special Areas of Operation SAWRS Supplementary Aviation Weather Reporting System SBAS Satellite-Based Augmentation System SIAP Standard Instrument Approach Procedure SIC Second in Command SID Standard Instrument Departure SIS Signal in Space S-LRNS Single Long-Range Navigation System SPECI Aviation Selected Special Weather Report STAR Standard Terminal Arrival STC Supplemental Type Certificate SUPPS Regional Supplementary Procedures TAF Terminal Area Forecast TC Type Certificate TF Track to Fix TOGA Takeoff/Go-Around
Appendix C C-12 Acronym Meaning TP Turning Point TSE Total System Error TSO Technical Standard Order VA Heading to Altitude VFR Visual Flight Rules VHF Very High Frequency VI Heading to Intercept VM Heading to Manual VNAV Vertical Navigation VOR Very High Frequency Omni-Directional Range VORTAC Very High Frequency Omnidirectional Range Collocated Tactical Air Navigation WAAS Wide Area Augmentation System WGS World Geodetic System XTK Cross-Track
Advisory Circular Feedback Form If you find an error in this AC, have recommendations for improving it, or have suggestions for new items/subjects to be added, you may let us know by contacting the Flight Technologies and Procedures Division at 9-AWA-AFS400-Coord@faa.gov or the Flight Standards Directives Management Officer at 9-AWA-AFB-120-Directives@faa.gov.
Subject: AC 90-80C, Approval of Offshore Standard Approach Procedures, Airborne Radar Approaches, and Helicopter En Route Descent Areas Date: _____________________ Please check all appropriate line items:
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