Definition
VORs are ground-based radio navigation stations that broadcast signals on very high frequency (VHF) bands, allowing a properly equipped aircraft to determine its bearing to or from the station along any one of 360 selectable courses, called radials. Each radial corresponds to a magnetic direction outward from the station, so the pilot can identify their position relative to the VOR and track a chosen course toward or away from it.
Plain English
VORs are radio beacons on the ground that send out signals in every direction. An aircraft receiver can read these signals and tell the pilot exactly which direction the aircraft is from the station, so the pilot can fly toward it, away from it, or along a chosen line through it.
Context Anchor
Seen on aeronautical charts, in instrument flight training, and when using a cockpit navigation radio to follow a course.
Derivation
The name describes how the station works. 'Very high frequency' refers to the radio band used (108.0–117.95 MHz). 'Omnidirectional' comes from Latin 'omni' meaning 'all' and 'directional', so the station transmits usable signals in all directions. 'Range' here means a navigation aid that provides directional guidance, not a distance — a holdover from earlier radio ranges that defined airways.
Why Pilots Care
VORs form the backbone of the U.S. airway system and provide the primary means of enroute navigation and instrument approaches when GPS is unavailable.
Analogy
Think of a VOR like the hub of a wheel with many direction lines spreading out from it. The aircraft receiver helps the pilot identify which line the airplane is on and follow the correct one.
Intuition Check
Do not assume range means the VOR tells you distance. By itself, a VOR tells direction from the station; distance requires separate distance-measuring equipment.
Example Sentence 1
After takeoff, she tuned the VOR, identified the station by its Morse code, and tracked the 270 radial outbound toward the next fix.
Example Sentence 2
Many instrument flight plans still rely on VORs for routing when GPS is not authorized for the segment.