How can a pilot check the accuracy of VOR receiver equipment?

A pilot can check the accuracy of VOR receiver equipment using multiple methods, which validates the importance of each approach in ensuring the reliability of navigation instruments.

Utilizing a VOT (VOR Test Facility) allows pilots to receive a known reference signal that indicates whether their VOR receiver is functioning correctly. When tuning in to a VOT frequency, pilots should observe a specific indication, generally that the VOR indicates an exact 360-degree bearing. If the display on the VOR receiver matches this known reference, the unit is considered accurate.

Ground checkpoints provide another means to verify VOR accuracy. These checkpoints are designated locations on the ground where VOR signals can be tested. Pilots can verify the reception of the correct course when they are positioned at these checkpoints, ensuring that the VOR indicates the proper radial and is aligned with the airport or geographical features as intended.

Airborne checkpoints also serve to check VOR accuracy while in-flight. These checkpoints involve predetermined waypoints or navigational aids that the pilot can cross-reference against their VOR reading. By cross-checking the aircraft’s position with the VOR signal while airborne, the pilot ensures that the equipment is functioning correctly.

Having multiple methods for checking VOR accuracy reinforces the reliability and validity