Aeronautical Chart Users’ GuideChart Users’ Guide · 9 July 2026
Section 14
ABBREVIATIONS
3 pagesPages 138–140
- A
- AAF - Army Air Field
- AAS - Airport Advisory Service
- AAUP - Attention All Users Page
- AC - Advisory Circular
- ADF - Automatic Direction Finder
- ADIZ - Air Defense Identification Zone
- ADS - Automatic Dependent Surveillance
- ADS-B - Automatic Dependent Surveillance-Broadcast
- Advsry - Advisory
- AFB - Air Force Base
- AFIS - Automatic Flight Information Service
- AFS - Air Force Station
- AFSS - Automated Flight Service Station
- AGL - Above Ground Level
- AIM - Aeronautical Information Manual
- AIRAC - Aeronautical Information Regulation And Control
- AK - Alaska
- AL - Approach and Landing
- ANG - Air National Guard
- APP - Approach
- APP CON - Approach Control
- APP CRS - Approach Course
- Apt - Airport
- APV - Approaches with Vertical Guidance
- ARP - Airport Reference Point
- ARTCC - Air Route Traffic Control Center
- ASDA - Accelerate-Stop Distance Available
- ASDE-X - Airport Surface Detection Equipment-Model X
- ASOS - Automated Surface Observing Station
- ASR - Airport Surveillance Radar
- ATC - Air Traffic Control
- ATIS - Automatic Terminal Information Service
- ATS - Air Traffic Service
- AUNICOM - Automated Aeronautical Advisory Station
- AWOS - Automated Weather Observing Station B
- Baro-VNAV - Barometric Vertical Navigation
- BS - Broadcast Station
- C
- CAC - Caribbean Aeronautical Chart
- CAT - Category
- CFA - Controlled Firing Areas
- CFR - Code of Federal Regulations
- CH - Channel
- CLNC DEL - Clearance Delivery
- CNF - Computer Navigation Fix
- COP - Changeover Point
- CPDLC - Controller Pilot Data Link Communication
- CRS - Course
- CT - Control Tower
- CTAF - Common Traffic Advisory Frequency
- CVFP - Charted Visual Flight Procedure
- CZ - Control Zone (Canada)
- D
- DA - Decision Altitude
- DA - Density Altitude
- D-ATIS - Digital Automatic Terminal Information Service
- DH - Decision Height
- DME - Distance Measuring Equipment
- DND - Department of National Defense (Canada)
- DoD - Department of Defense
- DOF - Digital Obstacle File
- DP - Departure Procedure
- DT - Daylight Savings Time
- DVA - Diverse Vector Area
- E
- E - East
- EFAS - Enroute Flight Advisory Service
- EFB - Electronic Flight Bag
- Elev - Elevation
- EMAS - Engineered Materials Arresting System F
- FAA - Federal Aviation Administration
- FAF - Final Approach Fix
- FAP - Final Approach Point
- FAR - Federal Aviation Regulation
- FBO - Fixed-Based Operator
- FIR - Flight Information Region
- FL - Flight Level
- FLIP - Flight Information Publication
- FMS - Flight Management System
- FREQ - Frequency
- FRZ - Flight Restricted Zone
- FSDO - Flight Standards District Office
- FSS - Flight Service Station
- G
- GBAS - Ground-Based Augmentation System
- GCO - Ground Communications Outlet
- GLS - GBAS Landing System
- GND - Ground
- GND CON - Ground Control
- GNSS - Global Navigation Satellite System
- GP - Glide Path
- GPS - Global Positioning System
- GS - Glide Slope
- GS - Ground Speed
- H
- HAA - Height Above Airport
- HAR - High Altitude Redesign
- HAT - Height Above Touchdown
- HCH - Heliport Crossing Height
- HF - High Frequency
- HIRL - High Intensity Runway Lights
- HS - Hot Spot
- I
- IAC - Interagency Air Committee
- IACC - Interagency Air Cartographic Committee
- IAF - Initial Approach Fix
- IAP - Instrument Approach Procedure
- ICAO - International Civil Aviation Authority
- IDT - Identifier
- IF - Intermediate Fix
- IFR - Instrument Flight Rules
- ILS - Instrument Landing System
- IMC - Instrument Meteorological Conditions
- INS - Inertial Navigation System
- IR - Instrument Route (Military)
- IRU - Inertial Reference Unit
- J
- JO - Joint Order
- K
- KIAS - Knots
- L
- LAA - Local Airport Advisory
- LAAS - Local Area Augmentation System
- LAHSO - Land and Hold Short
- LDA - Landing Distance Available
- LDA - Localizer-type Directional Aid
- Ldg - Landing
- LF - Low Frequency
- LIRL - Low Intensity Runway Lights
- LNAV - Lateral Navigation
- LOC - Localizer
- LOM - Locator Outer Marker
- LPV - Localizer Performance with Vertical Guidance
- LRRS - Long Range Radar Station
- LTP - Landing Threshold Point
- M
- MAA - Maximum Authorized Altitude
- MAP - Missed Approach Point
- MCA - Minimum Crossing Altitude
- MCAS - Marine Corps Air Station
- MDA - Minimum Descent Altitude
- MDH - Minimum Descent Height
- MEA - Minimum Enroute Altitude
- MEF - Maximum Elevation Figure
- MF - Medium Frequency
- MIA - Minimum IFR Altitude
- MIRL - Medium Intensity Runway Lights
- MOA - Military Operations Areas
- MOCA - Minimum Obstruction Clearance Altitude
- MON - Minimum Operational Network
- MORA - Minimum Off-Route Altitude
- MRA - Minimum Reception Altitude
- MSA - Minimum Safe Altitude
- MSL - Mean Sea Level
- MTA - Minimum Turning Altitude
- MTR - Military Training Route
- MVA - Minimum Vector Altitude
- N
- N - North
- N/A - Not Applicable
- NA - Not Authorized
- NAAS - Naval Auxiliary Air Station
- NAS - Naval Air Station
- NAS - National Airspace System
- NAV - Naval Air Facility
- NAVAID - Navigational Aid (Ground based)
- NDB - Non-Directional Radiobeacon
- NextGen - Next Generation Air Transportation System
- NFDC - National Flight Data Center
- NFPO - National Flight Procedures Office
- NM - Nautical Mile
- NOAA - National Oceanic and Atmospheric Administration
- NO A/G - No Air-to-Ground Communication
- NOTAM - Notice to Airmen
- NoPT - No Procedure Turn
- NPA - Non-Precision Approach
- NWS - National Weather Service
- O
- OAT - Outside Air Temperature
- OBS - Omni Bearing Selector
- OCA - Ocean Control Area
- OCS - Obstacle Clearance Surface
- ODP - Obstacle Departure Procedure
- OM - Outer Marker
- OROCA - Off Route Obstruction Clearance Altitude P
- PA - Precision Approach
- PAR - Precision Approach Radar
- PBN - Performance-Based Navigation
- PRM - Precision Runway Monitor
- PT - Procedure Turn
- PTP - Point-to-Point
- Pvt - Private
- R
- R - Radial
- R - Receive
- R - Restricted Area (Special Use Airspace)
- RCO - Remote Communications Outlet
- RCLS - Runway Centerline Lighting Systems
- RF - Radius-to-Fix
- RNAV - Area Navigation
- RNP - Required Navigation Performance
- RNP AR - Required Navigation Performance Authorization Required
- ROC - Required Obstacle Clearance
- RP - Right Pattern
- RVR - Runway Visual Range
- RVSM - Reduced Vertical Separation Minimum
- Rwy - Runway
- S
- S - South
- SAAAR - Special Aircraft and Aircrew Authorization Required
- SAAR - Special Aircraft and Aircrew Requirements
- SATNAV - Satellite Navigation
- SDF - Simplified Directional Facility
- SER - Start End of Runway
- SFAR - Special Flight Rules Area
- SFC - Surface
- SFRA - Special Flight Rules Area
- SIAPs - Standard Instrument Approach Procedures
- SID - Standard Instrument Departure
- SM - Statute Mile
- SMAR - Special Military Activity Routes
- SMGCS - Surface Movement Guidance and Control System
- SOIA - Simultaneous Offset Instrument Approaches
- SSV - Standard Service Volume
- STAR - Standard Terminal Arrival Procedure
- SUA - Special Use Airspace
- SVFR - Special Visual Flight Rules
- T
- T - Transmit
- TA - Travel Advisory
- TAA - Terminal Arrival Area
- TAC - Terminal Area Chart
- TACAN - Tactical Air Navigation
- TAS - True Air Speed
- TCA - Terminal Control Areas (Canada)
- TCH - Threshold Crossing Height
- TDZ - Touchdown Zone
- TDZE - Touchdown Zone Elevation
- TDZL - Touchdown Zone Lights
- TERPS - U.S. Standard for Terminal Instrument Procedures
- TFR - Temporary Flight Restriction
- TIBS - Telephone Information Briefing Service
- TIS-B - Traffic Information Service - Broadcast
- TOC - Top of Climb
- TOD - Top of Descent
- TODA - Takeoff Distance Available
- TOGA - Takeoff/Go Around
- TORA - Takeoff Runway Available
- TPP - Terminal Procedures Publication
- TRSA - Terminal Radar Service Area
- TWR - Tower
- U
- UC - Under Construction
- UHF - Ultra High Frequency
- UIR - Upper Information Region
- UNICOM - Universal Communications
- U.S. - United States
- USA - United States Army
- USAF - United States Air Force
- USCG - United State Coast Guard
- UTA - Upper Control Area
- V
- VCOA - Visual Climb Over Airport / Airfield
- VDA - Vertical Descent Angle
- VDP - Visual Decent Point
- VFR - Visual Flight Rules
- VGSI - Visual Glide Slope Indicator
- VHF - Very High Frequency
- VMC - Visual Meteorological Conditions
- VNAV - Vertical Navigation
- VOR - VHF Omnidirectional Radio Range
- VORTAC - VHF Omnidirectional Radio Range/Tactical Air Navigation
- VPA - Vertical Path Angle
- VR - Visual Route (Military)
- W
- W - Warning Area (Special Use Airspace)
- W - West
- WAAS - Wide-Area Augmentation System
- WAC - World Aeronautical Chart
- WP - Waypoint
- WX CAM - Weather Camera