Instrument Rating Checkride Practice Test

The allowable error for a VOR Test Facility (VOT) check is indeed ±4°. This means that when a pilot performs a VOT check, the reading indicated on the aircraft's VOR receiver should be within 4 degrees of the published VOT VOR signal. This standard ensures that the VOR system is functioning accurately and provides reliable navigation information to pilots flying under instrument conditions.

Routine checks of VOR systems are critical for safe instrument flight rules (IFR) operations, and ensuring adherence to the allowable error is a part of maintaining the integrity of navigational accuracy. If the reading exceeds this allowable error, it indicates that the VOR is not functioning correctly, and the pilot should take appropriate corrective actions, such as unreliable navigation or reporting the malfunction to maintenance personnel. Therefore, knowing and understanding the acceptable limits for VOT checks is essential for maintaining aviation safety.