Which system enhances situational awareness in commercial aviation?

The Traffic Collision Avoidance System (TCAS) is designed specifically to enhance situational awareness in commercial aviation by providing pilots with information on the proximity of other aircraft. It actively monitors the airspace around the aircraft and alerts pilots to any potential collisions by issuing traffic advisories. When a conflict is detected, TCAS can provide guidance on the necessary maneuver, indicating whether to climb or descend to avoid a collision.

The primary function of TCAS is to increase safety by preventing mid-air collisions, which is crucial in busy air traffic environments. By informing pilots of the relative altitude and distance of nearby aircraft, TCAS significantly improves their ability to make informed decisions, ultimately enhancing situational awareness during flight.

On the other hand, while systems like Ground Proximity Warning System (GPWS) and emergency locator transmitters serve important safety functions, their focus is more on alerts regarding terrain proximity or post-incident location rather than active situational awareness in terms of nearby aircraft. The in-flight entertainment system, while it may contribute to passenger comfort, does not enhance safety or situational awareness for the flight crew.