FAA Ground School Practice Test

What does a "TO" indication on the OBS suggest about the aircraft's course?

1. The aircraft is on a reciprocal course

2. The aircraft is flying toward the VOR station

3. The aircraft is flying away from the VOR station

4. The aircraft is experiencing turbulence

The correct answer is: The aircraft is flying toward the VOR station

A "TO" indication on the OBS (Omni-Bearing Selector) suggests that the aircraft is flying toward the VOR (VHF Omnidirectional Range) station. This indication is crucial for navigation, as it informs the pilot about the intended direction relative to the VOR. When the OBS is set to display a "TO" indication, the VOR system is indicating that the aircraft's current position is on the course leading directly to the VOR station. This is part of VOR navigation, where pilots use this information to ensure they are correctly aligned with their navigational path and can adjust their course as necessary to remain on track. In contrast, if it were indicated as "FROM," the aircraft would be flying away from the VOR station, needing a different navigation strategy. A "TO" indication helps pilots determine that they are progressing towards their destination based on the VOR signals, making it an essential component of aircraft navigation.