Definition
A ground-based radio navigation station that transmits VHF signals in every direction, allowing a properly equipped aircraft to determine its bearing to or from the station. As a NAVAID, a VOR serves as a fixed reference point used to define airways, instrument approaches, and RNAV procedures.
Plain English
A radio beacon on the ground that broadcasts signals in all directions. An aircraft tuned to it can tell what direction it lies in relation to the beacon, and pilots use these beacons as fixed points to fly to, from, or along.
Context Anchor
Seen on aeronautical charts, instrument approach procedures, and route descriptions where a VOR station is used to define a course, fix, or leg.
Derivation
VOR stands for VHF Omnidirectional Range -- 'omni' (Latin: all) and 'directional' meaning the station radiates usable signals in every direction. NAVAID is simply a shortening of 'navigational aid,' the general term for any ground or space-based facility that helps an aircraft navigate. Combined, 'VOR NAVAID' identifies a specific type of navigation aid based on VHF omnidirectional range technology.
Why Pilots Care
Provides a precise, non-GPS navigation reference used for airways, holding patterns, and instrument approaches, serving as a required backup when satellite navigation is unavailable or restricted.
Grounding Statement
Picture a fixed radio station on the ground that lets the aircraft determine its direction from that station while flying an instrument procedure.
Intuition Check
Do not think of a VOR NAVAID as just a named point on a chart. It is an actual navigation facility that transmits radio signals pilots can use.
Example Sentence 1
The procedure begins at the VOR NAVAID and tracks outbound on the 270 radial for ten miles.
Example Sentence 2
During the missed approach, the crew flew the published holding pattern using the VOR NAVAID as the reference point.