What is the purpose of the Anti-collision beacon?

The Anti-collision beacon is primarily designed to indicate aircraft activity, making option C the correct choice. These beacons serve as a visual warning system, emitting bright lights that are typically mounted on the top and/or bottom of an aircraft. Their purpose is to enhance the visibility of the aircraft to ground personnel and other aircraft, particularly during low light conditions or adverse weather, which can help prevent collisions.

When aircraft are on the ground, taxiing, or in the air, these beacons make it easier for others to see them, ensuring safer operations in busy environments like airports. This enhancement of visibility is crucial for reducing the risk of accidents or incidents, particularly in crowded airspaces where multiple aircraft may be present at the same time.

While other options describe various functions related to aircraft operations and safety, they do not specifically capture the primary purpose of the Anti-collision beacon, which centers on alerting others to the presence and activity of the aircraft. This function is vital for maintaining safety protocols and ensuring that all personnel are aware of aircraft movements in their vicinity.