Plain English Meaning

The instrument in the cockpit that works with a VOR radio to show the pilot which way to fly to track a chosen path to or from a ground station. The pilot picks a course, and the instrument shows whether the aircraft is on it, left of it, or right of it.

Full Definition

The cockpit display used with a VOR (Very High Frequency Omnidirectional Range) receiver that shows the aircraft's position relative to a selected course to or from a VOR ground station. It typically consists of an Omni Bearing Selector (OBS) to a course, a () showing left/right from that course, and a showing whether flying the selected course will take the aircraft toward or away from the station.