Which system helps pilots detect potential collisions with other aircraft?

The Traffic Collision Avoidance System (TCAS) is specifically designed to enhance the situational awareness of pilots regarding the presence of nearby aircraft and to provide necessary alerts about potential mid-air collisions. TCAS operates by interrogating transponders on other aircraft within its range, receiving their responses to calculate their altitude, position, and trajectory.

When a potential conflict is detected, TCAS generates visual and auditory alerts for the pilots. It may recommend maneuvers such as climbing or descending to avoid a collision, making it a critical safety feature in modern aviation.

The other systems listed serve different purposes. The Traffic Information System primarily provides pilots with information about nearby air traffic but does not actively initiate evasive actions like TCAS. The Weather Avoidance System is designed to detect and help pilots navigate around adverse weather conditions. The Ground Proximity Warning System alerts pilots when the aircraft is in danger of colliding with the ground but does not address mid-air collision avoidance. Thus, TCAS is the dedicated system for detecting and preventing potential collisions with other aircraft.