T-6A INSTRUMENT NAVIGATION
TACAN - An ultra-high frequency electronic air navigation aid that provides suitably equipped
aircraft a continuous indication of bearing and distance (slant range) to the TACAN station.
TRACK - The actual flight path of an aircraft over the surface of the earth.
TRANSPONDER - The airborne radar beacon receiver/transmitter portion of the ATC Radar
Beacon System. (See Radar Beacon.)
VICTOR AIRWAYS - A route system established in the form of a corridor on controlled
airspace. The routes are predicated solely on VOR/VORTAC NAVAIDs. Victor airways
include airspace at least 1200 feet above the surface (sometimes higher) up to but not including
18,000 feet MSL.
VISUAL DESCENT POINT - A defined point on the FAC of a non-precision straight-in
approach procedure from which normal descent from the MDA to the runway touchdown point
may be commenced, provided the approach threshold of that runway, or approach lights, or other
markings identifiable with the approach end of that runway are clearly visible to the pilot.