VOT

VOT. See VOR test facility.
VSI. See vertical speed indicator.
WAAS. See wide area augmentation system.

VOT- A ground facility which emits a test signal to check VOR receiver accuracy. Some VOT's are available to the user while airborne, and others are limited to ground use only.
(See AIM.)
(See AIRPORT/FACILITY DIRECTORY.) ...

The FAA operates a VOR test facility (VOT) and this station transmits one radial with a 0° FROM and 180° TO indication on the VOR indicator if its properly calibrated. Accuracy is +/- 4° on the ground and +/- 6° flying.

Use of VOT give zero From or 180 degrees To with allowable error + 4 degrees.
Ground checkpoints in AF/D +4 degrees
Airborne checkpoints in AF/D +6 degrees
Dual VOR check within 4 degrees
VOR idents in a series of four followed by DME ident.

VOR test facility (VOT)
VOR - Very High Frequency Omni Directional Range
VORTAC ...

VOR is the most commonly used radio navigation aid in private
flying. Increased accuracy is available in Doppler VORs (DVOR) which have replaced
some VOR is the UK system. Also VORTAC, combined VOR and TACAN, and VOT, VOR test facility.

Also VORTAC, combined VOR and TACAN, and VOT (VOR test facility).
VSI: Vertical Speed Indicator. One of the primary flight instruments showing rate of climb or descent.
V/STOL: Vertical and Short Take-Off and Landing.

See also: ATC, VOR, Visual approach, Vertical navigation, Receiver