Plain English Meaning

A special radio signal at certain airports that pilots use to check whether their VOR navigation equipment is reading correctly. If the instrument shows the expected reading when tuned to it, the equipment is working accurately enough to use for navigation.

Full Definition

A ground-based radio transmitter operated by the FAA that broadcasts a single, fixed test signal on a published VHF frequency, allowing pilots to verify the accuracy of their aircraft's VOR receiver before flight. A correctly functioning VOR receiver tuned to a VOT will indicate 0° FROM (or 180° TO) the station, with the , regardless of the aircraft's on the .