Instrument Rating Checkride Practice Test

Which of the following is NOT a method for performing a VOR check?

1. Ground Check

2. Airborne Check

3. Above a prominent ground landmark

4. Onboard Radar Check

The correct answer is: Onboard Radar Check

The correct answer is that "Onboard Radar Check" is not a recognized method for performing a VOR (VHF Omnidirectional Range) check. VOR checks are essential to ensure the accuracy of the VOR navigation system, which is vital for instrument flight. There are three standard methods for performing these checks: - The Ground Check involves positioning the aircraft on the ground at a known VOR checkpoint and observing the VOR indication to confirm that it accurately represents the station's signal. - The Airborne Check allows a pilot to fly at least 20 nautical miles away from a VOR station and monitor the VOR indication as the aircraft approaches and passes over the station, ensuring that the OBS (Omni Bearing Selector) displays an accurate course. - Checking VOR above a prominent ground landmark entails flying over a known reference point and using the VOR to confirm that it properly indicates the position relative to that landmark. On the other hand, an "Onboard Radar Check" is not a method used for VOR checks, as radar systems operate independently of VOR navigation signals and do not verify the operational accuracy of VOR equipment.