What is the procedure called when a pilot clicks the microphone on a specified radio frequency?

The procedure in which a pilot clicks the microphone on a specified radio frequency is known as pilot controlled lighting. This system allows pilots to turn on runway and taxiway lights by transmitting a series of clicks on their aircraft's microphone, which helps enhance visibility during takeoff or landing, especially at airports without full-time lighting. The frequency used for this procedure is often designated specifically for this function, allowing pilots to effectively operate the lights as needed.

This method is particularly beneficial at smaller airports or during specific times when lighting systems may not be operated continuously. The ability to control the lights in this manner supports safety and operational efficiency by ensuring that the runway and taxiway are adequately illuminated for the pilot's approach or departure.