What is the primary purpose of the Air Traffic Control Tower Light Gun Signal?

The primary purpose of the Air Traffic Control Tower Light Gun Signal is to provide visual guidance when radio communication is lost. This is particularly important in situations where pilots may be unable to receive or transmit messages via radio, such as during equipment failure or in instances of radio communication difficulties. The light gun allows air traffic controllers to communicate critical instructions to pilots using a series of color-coded light signals that can be seen from a distance, ensuring that aircraft can still be safely managed on the ground and during takeoff and landing operations. This serves as a crucial backup communication method, helping maintain safety and efficiency in busy airspace.