FAA Private Pilot Airplane (PAR)Navigation and Flight PlanningEasy
A pilot is navigating using a VOR receiver. The VOR indicator shows a 'FROM' indication with the Course Deviation Indicator (CDI) centered when 270 is selected in the Omni-Bearing Selector (OBS). Which radial is the aircraft currently on?
- A360 radial
- B180 radial
- C270 radial
- D090 radial
Show answer & explanationAnswer & explanation
Correct answer: C. 270 radial
When the CDI is centered with a 'FROM' indication, the OBS setting indicates the radial the aircraft is currently on. Therefore, if 270 is selected and it shows 'FROM' with a centered CDI, the aircraft is on the 270 radial.
Why the other options are wrong
- A. Incorrect. This radial is 90 degrees off from the selected course.
- B. Incorrect. This radial is 90 degrees off from the selected course.
- D. This would be the case if the OBS was set to 090 and a 'TO' indication was displayed, or if the OBS was set to 270 and the CDI was centered with a 'TO' indication.
VOR 'FROM' Indication
A 'FROM' indication on a VOR receiver means the aircraft is flying away from the VOR station on the selected radial, or is currently located on that radial.
- Indicates flying away from the VOR.
- When CDI is centered, OBS shows the radial you are on.
- Opposite of a 'TO' indication.
Memory trick: FROM means you're flying FROM the radial you've set.