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Aeronautical Chart Users’ Guide

FAA Chart Users’ Guide Version 9 July 2026
All Library Documents

Abbreviations

Alphabetical definitions of abbreviations used on FAA aeronautical charts and terminal procedures.

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