Glossary
Instrument Flight
T
TACAN: Tactical air navigation. A UHF electronic air navigation aid that provides suitably equipped
aircraft a continuous indication of azimuth and distance to the station.
Track: The actual flight path of an aircraft over the ground.
V
Vertigo: The sensation of dizziness and the feeling that oneself or one’s environment is whirling about.
Visual Approach: An approach wherein an aircraft on an IFR flight plan, operating in VFR conditions
under control of an air traffic control facility and having an air traffic control authorization, may proceed to
the airport of destination under VFR conditions.
Visual Descent Point (VDP): A defined point on the final approach course 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, the approach lights, or other markings
identifiable with the approach end of that runway are clearly visible to the pilot.
Visual Meteorological Conditions (VMC): Basic weather conditions prescribed for flight under visual
flight rules (VFR).
VOR: VHF Omnidirectional Range, an electronic air navigational aid which transmits 360 degrees of
azimuth, oriented to magnetic north.
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