Definition
Omniranges are ground-based VHF radio navigation stations that transmit signals in every direction (360 degrees), allowing a properly equipped aircraft to determine its bearing to or from the station along any radial. The term is most commonly used as a short form of VHF Omnidirectional Range (VOR) stations.
Plain English
Radio navigation stations on the ground that send out signals in every direction, so an aircraft can figure out which direction it is from the station and fly toward or away from it on a chosen line.
Context Anchor
Seen in VOR navigation discussions, especially when describing radio navigation stations, airways, and courses based on signals from ground facilities.
Derivation
Built from 'omni-' (Latin omnis, meaning 'all') and 'range,' which in radio navigation refers to a station that defines bearings or courses. So an omnirange is a station that provides course information in all directions, not just along a few fixed beams as older systems did.
Why Pilots Care
These facilities form the core of the low-altitude airway system and provide reliable bearing information for both visual and instrument navigation.
Intuition Check
Do not read range here as “distance.” An omnirange mainly helps show direction or course relative to the station; distance requires separate distance-measuring equipment if available.
Example Sentence 1
Before GPS became standard, pilots navigated cross-country flights by tuning successive omniranges and tracking radials between them.
Example Sentence 2
Many cross-country routes are still defined by connections between omniranges.