What is the purpose of the Traffic Alert and Collision Avoidance System (TCAS)?

The Traffic Alert and Collision Avoidance System (TCAS) is designed specifically to enhance safety by providing collision avoidance capabilities to pilots. This system monitors the airspace around an aircraft for other transponder-equipped aircraft and issues alerts to the flight crew if a potential conflict is detected. If the system determines that two aircraft are on a collision course, it provides recommended maneuvers, known as "Resolution Advisories," to help ensure safe separation between the aircraft. This capability is vital for preventing mid-air collisions and enhancing situational awareness for pilots operating in busy airspace.

The other options do not align with the function of TCAS. While tracking passenger boarding, enhancing fuel efficiency, and calculating weight distribution are important operational aspects in aviation, they are not related to the primary safety mission of TCAS. The focus of TCAS is unequivocally on collision avoidance, highlighting its critical role in aviation safety.