FAA Instrument Flight Instructor (FII)IFR Procedures and ApproachesMedium
A pilot is performing a VOR receiver accuracy check using a VOR test facility (VOT). The pilot tunes the VOT frequency and centers the CDI with a 'TO' indication. What radial should the OBS indicate for a valid check?
- A270 degrees
- B360 degrees
- C180 degrees
- D090 degrees
Show answer & explanationAnswer & explanation
Correct answer: B. 360 degrees
When using a VOT (VOR Test Facility), the CDI should indicate 0 degrees 'TO' or 180 degrees 'FROM' with a centered needle. Therefore, if the pilot centers the CDI with a 'TO' indication, the OBS should indicate 360 degrees (which is equivalent to 0 degrees).
Why the other options are wrong
- A. This is incorrect; VOTs transmit a specific radial for testing.
- C. 180 degrees 'FROM' would be correct, but the question specifies 'TO' indication.
- D. This is incorrect; VOTs transmit a specific radial for testing.
VOT Accuracy Check Indications
A VOR receiver accuracy check using a VOT (VOR Test Facility) requires the CDI to center with specific OBS indications of 0 degrees ('TO') or 180 degrees ('FROM').
- VOTs transmit a 360/0 degree radial omnidirectionally.
- Centered CDI with 'TO' should show 0° (or 360°).
- Centered CDI with 'FROM' should show 180°.
Memory trick: VOT's 360 TO, 180 FROM, for a perfect view.