What does TCAS stand for?

The correct answer is B, which stands for Traffic Collision Avoidance System. TCAS is an important safety feature in aviation that helps prevent mid-air collisions. It operates by using transponder signals from nearby aircraft to assess their relative positions and movements. If it detects a potential collision threat, TCAS provides pilots with visual and audible alerts. These alerts indicate whether to climb or descend to avoid a collision.

Understanding TCAS is crucial for pilots and air traffic control personnel as it enhances situational awareness and helps maintain safe distances between aircraft, significantly improving flight safety. The other terms listed do not accurately define the specific system and function of TCAS in the aviation industry, which is why B is the correct choice.