What is the maximum allowable error for VOR accuracy checks conducted on the ground?

The maximum allowable error for VOR accuracy checks conducted on the ground is indeed plus or minus 4 degrees. This standard is established to ensure that VOR navigation systems provide reliable and accurate directional guidance for pilots.

Operating within this tolerance helps maintain precision in navigation, especially when flying in close proximity to controlled airspace, obstacles, or in complex environments. The VOR system is critical for providing lateral guidance, and any deviation beyond the specified limit could potentially lead to navigation errors.

For practical purposes, this accuracy is vital not only for pilot training and proficiency but also for air traffic management and safety. Ground checks are conducted to confirm that the VOR system is functioning correctly before flight, ensuring that pilots can trust the information received while airborne.

Understanding this standard helps pilots ensure that they meet the regulatory requirements and maintain the safety and integrity of their flight operations.