Definition
A ground-based radio navigation aid that transmits on VHF frequencies between 108.0 and 117.95 MHz and provides bearing information from the station along 360 selectable courses, called radials, radiating outward in every direction from the transmitter. An aircraft VOR receiver compares two signals broadcast by the station to determine the aircraft's magnetic bearing to or from the station, allowing the pilot to navigate along a chosen radial.
Plain English
A radio station on the ground that broadcasts a signal in every direction, and an instrument in the aircraft uses that signal to tell the pilot which direction the station is from the airplane. By following one of these directions, the pilot can fly a straight, predictable line to or from the station.
Context Anchor
Pilots encounter this term in navigation training, on aeronautical charts, and when tuning navigation radios in the cockpit.
Derivation
Very-High-Frequency refers to the radio band the station uses (30 to 300 MHz). Omnirange combines the Latin omni- meaning 'all' with range, meaning the station provides usable bearing information in all directions, not just along a few fixed paths like older low-frequency ranges did.
Why Pilots Care
It supplies reliable directional guidance that supports airway navigation and instrument flight without needing visual references.
Analogy
Picture the station as the center of a compass rose with 360 invisible spokes coming out from it. The aircraft’s receiver helps the pilot identify and follow one of those spokes.
Intuition Check
Do not read “range” here as “how far away.” A Very-High-Frequency Omnirange mainly gives direction information; distance information requires separate distance-measuring equipment or another source.
Example Sentence 1
After takeoff, she tuned the VOR to 113.5 and tracked the 270 radial outbound to stay on the published departure route.
Example Sentence 2
During the cross-country flight the crew used the Very-High-Frequency Omnirange to confirm their position along the planned route.