What is a beacon in the context of aviation?

In aviation, a beacon refers specifically to a tower-mounted device that emits a large, rotating light, serving as a visual aid for pilots. These beacons are crucial for guiding aircraft during takeoff, landing, and navigation, especially in low-visibility conditions such as fog, rain, or nighttime operations. They help enhance safety by marking important locations like runways or navigational points in the airspace.

This function differentiates beacons from other aviation-related items, such as designated aircraft types or communication systems, which serve different roles in the aviation ecosystem. While communication systems facilitate dialogue between pilots and air traffic control, and weather devices predict or manage atmospheric conditions, the primary purpose of a beacon is to provide a visible signal to assist pilots in their flight operations.