What is the main purpose of TCAS?

The primary purpose of TCAS, or Traffic Alert and Collision Avoidance System, is to track and communicate with nearby aircraft to prevent mid-air collisions. It works by using sensors to detect the position of surrounding aircraft and assesses their relative altitude. When aircraft are identified as being on a collision course, TCAS provides pilots with guidance on vertical maneuvers to take in order to avoid potential conflicts. This system plays a critical role in enhancing aviation safety by alerting pilots to potential threats in the vicinity, thereby enabling them to take appropriate actions to maintain safe separation from other aircraft in flight.

While other systems may manage fuel efficiency, assist with navigation, or control autopilot functions, they do not primarily focus on the direct prevention of mid-air collisions like TCAS does.