Definition
A rotating ground-based light formerly used to mark the route of a federal airway, typically installed on towers along established cross-country flight paths. Most have been decommissioned, but a small number remain in service in remote or mountainous areas to mark airway segments where ground-based visual reference is still useful.
Plain English
A rotating light on a tower that marks the path of an airway from the ground, so pilots flying at night could follow the route by sight.
Context Anchor
You may encounter this term in discussions of visual navigation aids, older airway systems, and route marking in remote or mountainous areas.
Derivation
Airway means the established route between two points used by aircraft. Beacon comes from Old English beacen, meaning a sign or signal, originally a fire lit to warn or guide. Together: a guiding signal along an aerial route.
Why Pilots Care
These beacons enabled early visual airway navigation before radio aids became widespread and remain relevant for understanding legacy route structures.
Intuition Check
Do not assume an airway beacon marks an airport. Here, “airway” means an aircraft route, and the beacon is a visual marker for that route.
Example Sentence 1
Flying through the mountain pass at night, the pilot spotted an airway beacon rotating on a ridge, confirming they were tracking the old airway.
Example Sentence 2
Early airway beacons formed the backbone of the federal airway system in the 1920s and 1930s.