@airr484: TCAS stands for Traffic Alert and Collision Avoidance System, an independent electronic system installed on aircraft to help pilots prevent mid-air collisions. How TCAS WorksSurveillance: The system uses an onboard radio transmitter to send signals (interrogations) to the transponders of other aircraft nearby.Position Tracking: It measures the response time and signal strength to calculate the relative distance, altitude, and direction of those surrounding planes.Independent Operation: It works completely on its own, without needing instructions or radar from ground-based air traffic control. #tcas #airplanes #alert #atc #controle