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  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  WAAS—Wide Area Augmentation System  WAC—World Aeronautical Chart  WAM—Wide Area Multi-lateration  WP—Waypoint  ZFW—Fort Worth Air Route Traffic Control Center  B-8  Z  W  V  U 