FAA Instrument Rating Airplane (IRA)Navigation SystemsEasy
A pilot is conducting an instrument approach using a VOR receiver. The aircraft is 30 NM from the VOR station. What is the maximum acceptable bearing error for an airborne VOR check?
- A±8 degrees
- B±2 degrees
- C±4 degrees
- D±6 degrees
Show answer & explanationAnswer & explanation
Correct answer: D. ±6 degrees
For an airborne VOR check, the maximum permissible bearing error is ±6 degrees. This tolerance is greater than ground checks due to potential aircraft movement and signal variations during flight.
Why the other options are wrong
- A. This tolerance is too liberal and does not meet regulatory requirements for VOR checks.
- B. This tolerance applies to VOR ground checkpoints, not airborne checks.
- C. This is not a standard tolerance for VOR checks.
Airborne VOR Check Tolerance
The maximum allowable bearing error when performing a VOR receiver check while the aircraft is in flight.
- Performed by tuning a VOR test signal or comparing with a known radial.
- Tolerance is ±6 degrees.
- Must be recorded in the aircraft logbook.
Memory trick: Ground is tight, Air is loose.