What is the primary purpose of ATC light gun signals?

The primary purpose of ATC light gun signals is to communicate with aircraft when radio communication fails. In situations where radio communication is compromised, such as during radio failure or when an aircraft is unable to receive or transmit signals effectively, light gun signals serve as an essential backup for air traffic controllers. These signals utilize different colors and patterns to convey specific instructions to pilots, such as clearance to land, takeoff, or taxi, ensuring that safe flight operations can continue even in the absence of radio communication.

While navigation assistance, indicating weather conditions, and guiding during landing procedures are important aspects of aviation, they are not the primary focus of light gun signals. The utility of light gun signals primarily lies in their role as an alternative communication method, highlighting their crucial function for maintaining safety and effective communication in air traffic control.