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 

## V 

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 

