What is the maximum allowable bearing error for a VOR check?

The maximum allowable bearing error for a VOR check is +/- 4 degrees for VOT, which stands for VOR Test Facility. A VOT provides a specific method for checking VOR accuracy by broadcasting a signal that can be easily identified by pilots. When using a VOT, pilots should observe a bearing that is within 4 degrees of the indicated VOT radial on their VOR receiver in either direction to ensure the system is functioning correctly.

This standard is crucial for maintaining navigational accuracy and safety as VOR is a commonly used navigation aid in aviation. The defined tolerances help pilots ensure their instruments are reliable, thereby reducing the risk of navigation errors during flight.

Understanding the allowable errors for ground checks, dual checks, and aerial checks reveals the importance of VOT specifically, as it is designed for a stringent accuracy measure, supporting pilots better in ensuring their navigational systems are operationally reliable.