Mode S transponder

A Mode S transponder is a device on an aircraft that enhances communication with air traffic control. It responds to radar signals with detailed information, such as the aircraft’s identity and altitude, allowing controllers to track aircraft more accurately and efficiently. Unlike older systems, Mode S can selectively respond only to specific radar interrogations, reducing clutter and improving safety. It also supports features like automatic conflict alerts and precise position reporting, helping manage increasing air traffic and improving overall flight safety.