Why is a transponder significant in air traffic control?

A transponder is a crucial tool in air traffic control as it transmits vital information about an aircraft’s location, altitude, and identity directly to air traffic controllers. This data is essential for maintaining situational awareness in busy airspace, allowing ATC to effectively monitor and manage the flow of air traffic. By receiving this information, controllers can track aircraft movements and make informed decisions regarding separation, routing, and safety, ultimately enhancing the overall efficiency and safety of aviation operations.

The transponder plays a vital role in collision avoidance and helps in identifying aircraft on radar, making it an indispensable component of modern air traffic surveillance systems.