Definition
A ground-based radio navigation aid that transmits signals on VHF frequencies (108.0–117.95 MHz), allowing a properly equipped aircraft to determine its bearing to or from the station along any of 360 selectable courses called radials. The pilot tunes the station, identifies it by its Morse code identifier, and uses the cockpit indicator to fly toward, away from, or across a chosen radial.
Plain English
A radio beacon on the ground that broadcasts in every direction at once. The aircraft's receiver works out which direction it's sitting from the beacon, so the pilot can fly a straight line to it, away from it, or across it.
Context Anchor
Pilots encounter VORs on enroute charts, instrument procedures, navigation radios, and cockpit displays during instrument navigation.
Derivation
Very High-Frequency refers to the radio band used (30–300 MHz). Omnidirectional comes from Latin omni (all) and direction — meaning the station transmits useful signal in all directions, not just along one path. Range here means a navigation reference, not distance — older radio navigation stations were called 'ranges' because they defined the route an aircraft could fly.
Why Pilots Care
Provides precise navigation guidance independent of visibility, forming the primary structure of the federal airway system for IFR flight.
Analogy
Think of a VOR like a lighthouse that sends out direction information all around the compass. Your aircraft receiver does not just see the light; it can tell which compass line from the station you are on.
Intuition Check
Do not assume “range” means the VOR tells you how far away you are. A basic VOR tells you direction from the station; distance requires separate equipment or another source.
Example Sentence 1
After takeoff, the pilot tuned the VOR, verified its identifier, and tracked outbound on the 270 radial toward the next waypoint.
Example Sentence 2
During the missed approach, the crew tracked outbound on the VOR radial until reaching the holding fix.