Acronyms

• A
• AAC—Aircraft Administration Communications
• AAUP—Attention All Users Page
• AC—Advisory Circular

ACARS—Aircraft Communications Addressing and Reporting System ADCs—Air Data Computer

• ADDS—Aviation Digital Data Services
• ADF—Automatic Direction Finder
• ADS—Automatic Dependent Surveillance
• ADS-B—Automatic Dependent Surveillance-Broadcast
• AEG—Aircraft Evaluation Group
• A/FD—Airport/Facility Directory section of the Chart Supplement (CS)
• AFM—Aircraft Flight Manual
• AFMS—Aircraft Flight Manual Supplements
• AFS—Aircraft Flight Safety
• AFS—Flight Standards Service
• AFSS—Automated Flight Service Station
• AGL—Above Ground Level
• AIM—Aeronautical Information Manual
• AIP—Aeronautical Information Publication
• AIR—Aircraft Certification Service
• AIRMET—Airman’s Meteorological Information
• ALT ACQ—Altitude Acquire
• ALT Hold—Altitude Hold
• ANP—Actual Navigation Performance
• AOC—Aircraft Operational Communications
• APT WP—Airport Waypoint
• APV—Approach with Vertical Guidance
• ARINC—Aeronautical Radio Incorporated
• A-RNAV—Advanced Area Navigation
• ARTCC—Air Route Traffic Control Center
• ARTS—Automated Radar Terminal System
• ASDA—Accelerate-Stop Distance Available
• ASDE-X—Airport Surface Detection Equipment-Model X
• A-SMGCS—Advanced Surface Movement Guidance and Control System
• ASOS—Automated Surface Observing System
• ASR—Airport Surveillance Radar
• ASRS—Aviation Safety Reporting System
• ATA—Air Transport Association
• ATC—Air Traffic Control
• ATCAA—Air Traffic Control Assigned Airspace
• ATCRBS—Air Traffic Control Radar Beacon System
• ATCS—Air Traffic Control Specialist
• ATD—Along-Track Distance

• C
• ATIS—Automatic Terminal Information Service
• ATS—Air Traffic Service
• AWC—Aviation Weather Center
• AWOS—Automated Weather Observing System

AWSS—Automated Weather Sensor System B Baro-VNAV—Barometric Vertical Navigation

• B-RNAV—European Basic RNAV
• CAT—Category
• CDI—Course Deviation Indicator
• CDL—Configuration Deviation List
• CENRAP—Center Radar ARTS Processing
• CFA—Controlled Firing Areas
• CFIT—Controlled Flight Into Terrain
• CFR—Code of Federal Regulations
• CNF—Computer Navigation Fix
• COP—Changeover Point
• COTS—Commercial Off-The-Shelf
• CRC—Cyclic Redundancy Check
• CS—Chart Supplement
• CTAF—Common Traffic Advisory Frequency
• CVFP—Charted Visual Flight Procedure
• CWAS—Center Weather Advisories D
• DA—Density Altitude; Decision Altitude
• D-ATIS—Digital Automatic Terminal Information Service
• D-CS—Digital Chart Supplement
• DDA—Derived Decision Altitude
• DEM—Digital Elevation Model
• DER—Departure End of the Runway
• DF—Direction Finding
• DH—Decision Height
• DME—Distance Measuring Equipment
• DOD—Department of Defense
• DOT—Department of Transportation DPs—Departure Procedures
• DRVSM—Domestic Reduced Vertical Separation Minimums
• DUATS—Direct User Access Terminal System
• DVA—Diverse Vector Area
• E
• E/D—End of Decent
• EDCT—Expect Departure Clearance Time
• EFAS—En-Route Flight Advisory Service
• EFB—Electronic Flight Bag
• EFC—Expect Further Clearance
• EFV—Enhanced Flight Visibility

EFVS—Enhanced Flight Vision System

EGPWS—Enhanced Ground Proximity Warning System EOPs—Engine Out Procedures

• EOVM—Emergency Obstruction Video Map
• ER-OPS—Extended Range Operations
• ETA—Estimated Time of Arrival
• EV—Enhanced Vision
• EVO—Equivalent Visual Operations
• EWINS—Enhanced Weather Information System F
• FAA—Federal Aviation Administration
• FAF—Final Approach Fix
• FAP—Final Approach Point
• FB—Fly-By
• FCC—Federal Communications Commission
• FD—Flight Director
• FDP—Flight Data Processing
• FE—Flight Engineer
• FIR—Flight Information Region
• FIS—Flight Information System
• FIS-B—Flight Information Services–Broadcast
• FISDL—Flight Information Services Data Link
• FL—Flight Level
• FL CHG—Flight Level Change
• FLIR—Forward Looking Infra-Red
• FMC—Flight Management Computer
• FMS—Flight Management System
• FO—Fly-Over
• FOM—Flight Operations Manual
• FPA—Flight Path Angle
• FPV—Flight Path Vector
• FSB—Flight Standardization Board
• FSDO—Flight Standards District Office
• FSL—NOAA Forecast Systems Laboratory
• FSS—Flight Service Station
• G
• GBAS—Ground-Based Augmentation System
• GCA—Ground Controlled Approach
• GCO—Ground Communication Outlet
• GDP—Ground Delay Programs
• GDPE—Ground Delay Program Enhancements
• GLS—Ground Based Augmentation System Landing System
• GNSS—Global Navigation Satellite System
• GPS—Global Positioning System
• GPWS—Ground Proximity Warning System
• G/S—Glide Slope
• GS—Ground Speed
• GWS—Graphical Weather Service

• H
• HAA—Height Above Airport
• HAR—High Altitude Redesign
• HAT—Height Above Touchdown
• HAZMAT—Hazardous Materials
• HDD—Head-Down Display
• HF—High Frequency
• HGS—Head-up Guidance System
• HIWAS—Hazardous In-flight Weather Advisory Service
• HSI—Horizontal Situation Indicator
• HUD—Head-up Display
• I
• IAF—Initial Approach Fix
• IAP—Instrument Approach Procedure
• IAS—Indicated Air Speed
• ICAO—International Civil Aviation Organization
• IF—Intermediate Fix
• IFR—Instrument Flight Rules
• IIMC—Inadvertent Instrument Meteorological Condition
• ILS—Instrument Landing System
• IMC—Instrument Meteorological Conditions
• INS—Inertial Navigation System
• IOC—Initial Operational Capability
• IRU—Inertial Reference Unit
• K
• KIAS—knots indicated airspeed
• KLAX—Los Angeles International Airport
• KLMU—Monroe Regional Airport
• L
• LAAS—Local Area Augmentation System
• LAHSO—Land And Hold Short Operations
• LDA—Localizer-type Directional Aid; Landing Distance Available
• LF—Low Frequency
• LNAV—Lateral Navigation
• LOC—Localizer
• LOM—Locator Outer Marker
• LPV—Localizer Performance with Vertical Guidance
• LTP—Landing Threshold Point
• LVL CHG—Level Change
• M
• MAA—Maximum Authorized Altitude
• MAHWP—Missed Approach Holding Waypoint
• MAMS—Military Airspace Management System
• MAP—Missed Approach Point
• MCA—Minimum Crossing Altitude

• MDA—Minimum Descent Altitude
• MDH—Minimum Descent Height
• MEA—Minimum En-route Altitude
• MEL—Minimum Equipment List
• METAR—Aviation Routine Weather Report
• MF—Medium Frequency
• MIA—Minimum IFR Altitude
• MLS—Microwave Landing System
• MMWR—Millimeter Wave Radar
• MNPS—Minimum Navigation Performance Specifications
• MOA—Military Operations Area
• MOCA—Minimum Obstruction Clearance Altitude
• MOPS—Minimum Operational Performance Standards
• MORA—Minimum Off-Route Altitude
• MRA—Minimum Reception Altitude
• MSA—Minimum Safe Altitude
• MSAW—Minimum Safe Altitude Warning
• MSL—Mean Sea Level
• MTA—Minimum Turning Altitude
• MTR—Military Training Route
• MVA—Minimum Vectoring Altitude
• N
• NA—Not Authorized
• NACO—National Aeronautical Charting Office
• NAS—National Airspace System
• NASA—National Aeronautics and Space Administration
• NAT—North Atlantic
• NAVAID—Navigational Aid
• NCAR—National Center for Atmospheric Research

NDB—Non-Directional Beacon NextGen—Next Generation Air Transportation System

• NFDC—National Flight Data Center
• NGA—National Geospatial- Intelligence Agency
• NM—Nautical Mile
• NMAC—Near Mid-Air Collision
• NNEW—Next Generation Network-Enabled
• NOAA—National Oceanic and Atmospheric Administration
• NO A/G—No Air-to-Ground Communication
• NOPAC—North Pacific
• NOTAM—Notice to Airmen
• NOZ—Normal Operating Zone
• NPA—Non-Precision Approach
• NRR—Non-Restrictive Routing
• NRS—National Reference System
• NTAP—Notice to Airmen Publication
• NTSB—National Transportation Safety Board
• NTZ—No Transgression Zone
• NVS—NAS voice switch
• NWS—National Weather Service

• O
• OAT—Outside Air Temperature
• OBS—Omni Bearing Selector
• OCS—Obstacle Clearance Surface
• ODP—Obstacle Departure Procedure OpSpecs—Operations Specifications
• OROCA—Off-Route Obstruction Clearance Altitude
• OSV—Operational Service Volume P
• PA—Precision Approach
• PAR—Precision Approach Radar
• PCG—Positive Course Guidance
• PDC—Pre-Departure Clearance
• PDR—Preferential Departure Route
• PF—Pilot Flying
• PFD—Primary Flight Display
• PI—Principal Inspector
• PIC—Pilot In Command
• PIREP—Pilot Weather Report
• PKI—Public/Private Key Technology
• PM—Pilot Monitoring
• POH—Pilot’s Operating Handbook
• POI—Principle Operations Inspector
• PRM—Precision Runway Monitor
• P-RNAV—European Precision RNAV
• PT—Procedure Turn
• PTP—Point-To-Point
• Q
• QFE—Transition Height
• QNE—Transition Level
• QNH—Transition Altitude
• R
• RA—Resolution Advisory; Radio Altitude
• RAIM—Receiver Autonomous Integrity Monitoring
• RAL—Research Applications Laboratory
• RCO—Remote Communications Outlet
• RJ—Regional Jet
• RNAV—Area Navigation
• RNP—Required Navigation Performance
• RNP AR—Required Navigation Performance Authorization Required
• ROC—Required Obstacle Clearance
• RSP—Runway Safety Program
• RVR—Runway Visual Range
• RVSM—Reduced Vertical Separation Minimums
• RVV—Runway Visibility Value
• RWY—Runway
• RWY WP—Runway Waypoint

• S
• SA—Situational Awareness
• SAMS—Special Use Airspace Management System
• SAR—Search and Rescue
• SAS—Stability Augmentation System
• SDF—Simplified Directional Facility
• SDR—Service Difficulty Reports
• SER—Start End of Runway
• SIAP—Standard Instrument Approach Procedure
• SID—Standard Instrument Departure
• SIGMET—Significant Meteorological Information
• SM—Statute Mile
• SMA—Surface Movement Advisor
• SMGCS—Surface Movement Guidance and Control System
• SOIA—Simultaneous Offset Instrument Approaches
• SOP—Standard Operating Procedure
• SPECI—Non-routine (Special) Aviation Weather Report
• SSV—Standard Service Volume
• STAR—Standard Terminal Arrival
• STARS—Standard Terminal Automation Replacement System
• STC—Supplemental Type Certificate
• SUA—Special Use Airspace
• SUA/ISE—Special Use Airspace/In-flight Service Enhancement
• SVFR—Special Visual Flight Rules
• SVGS – Synthetic Vision Guidance System
• SVS—Synthetic Vision System
• SWAP—Severe Weather Avoidance Plan
• SWIM—System Wide Information Management T
• TA—Traffic Advisory
• TAA—Terminal Arrival Area
• TACAN—Tactical Air Navigation
• TAF—Terminal Aerodrome Forecast
• TAS—True Air Speed
• TAWS—Terrain Awareness and Warning Systems
• TB—Track Bar
• TCAS—Traffic Alert and Collision Avoidance System
• TCH—Threshold Crossing Height
• TDLS—Terminal Data Link System
• TDZ—Touchdown Zone
• TDZE—Touchdown Zone Elevation
• TEC—Tower En-route Control
• TERPS—Terminal Instrument Procedures
• TFR—Temporary Flight Restriction
• TIBS—Telephone Information Briefing Service
• TIS-B—Traffic Information Service-Broadcast
• TIBS—Telephone Information Briefing Service
• TOC—Top Of Climb
• TOD—Top Of Descent
• TODA—Takeoff Distance Available
• TOGA—Takeoff/Go Around

• V
• TORA—Takeoff Runway Available
• TPP—Terminal Procedures Publication
• TRACAB—Terminal Radar Approach Control in Tower Cab
• TSO—Technical Standard Order
• TSOA—Technical Standing Order Authorization
• U
• UHF—Ultra High Frequency
• UNICOM—Universal Communications
• U.S.—United States
• USAF—United States Air Force
• USDA—United States Department of Agriculture
• VCOA—Visual Climb Over Airport / Airfield
• VDA—Vertical Descent Angle
• VDP—Visual Descent Point
• VFR—Visual Flight Rules
• VGSI—Visual Glide Slope Indicator
• VHF—Very High Frequency
• VLJ—Very Light Jet
• VMC—Visual Meteorological Conditions
• VMINI—Minimum Speed–IFR
• VNAV—Vertical Navigation
• VNEI—Never-Exceed Speed-IFR
• VSI—Vertical Speed Indicator
• VOR—Very High-Frequency Omnidirectional Range

VORTAC—Very High Frequency Omnidirectional Range/Tactical Air Navigation

• VOT—VOR Test Facility Signal
• VPA—Vertical Path Angle
• VREF—Reference Landing Speed
• V/S—Vertical Speed

VSO—Stalling Speed or the Minimum Steady Flight Speed in the Landing Configuration

• W
• WAAS—Wide Area Augmentation System
• WAC—World Aeronautical Chart
• WAM—Wide Area Multi-lateration
• WP—Waypoint
• Z
• ZFW—Fort Worth Air Route Traffic Control Center