Definition
A short-range ground-based radio navigation system that transmits VHF signals on frequencies between 108.0 and 117.95 MHz. A VOR ground station broadcasts signals in every direction (omni-directional), allowing a properly equipped aircraft to determine its bearing to or from the station along any of 360 selectable courses, called radials, measured in degrees from magnetic north.
Plain English
A radio beacon on the ground that sends out signals in all directions. An aircraft receiver can read these signals to figure out which direction the aircraft is from the beacon, so the pilot can fly directly toward it or away from it on a chosen line.
Context Anchor
Pilots encounter VORs during navigation planning, instrument training, enroute flying, and aircraft radio-navigation checks.
Derivation
‘Omni’ comes from the Latin omnis, meaning ‘all’ or ‘every.’ ‘Range’ here means a directional bearing line, not a distance. So ‘omni range’ means a station that provides bearing information in every direction — which is exactly what a VOR does. The ‘very high frequency’ part refers to the VHF radio band the system uses.
Why Pilots Care
It gives reliable directional guidance that works in any weather, supporting both cross-country flight and precision approaches.
Analogy
Think of the VOR station like the center of a wheel. The airplane’s receiver helps the pilot identify which direction line from that center the airplane is on and then follow the chosen line.
Intuition Check
Do not assume “range” means the VOR tells you how far away you are. A basic VOR tells direction from the station; distance requires separate distance-measuring equipment or another source.
Example Sentence 1
The technician tuned the aircraft’s navigation receiver to the local VOR frequency to verify the bearing indication during the post-installation check.
Example Sentence 2
During the approach briefing the crew confirmed the VOR frequency and final approach course.