What is TCAS and how should controllers respond to TCAS advisories?

What is TCAS and how should controllers respond to TCAS advisories?

• A. It issues resolution advisories to pilots
• B. It is the Traffic Collision Avoidance System; controllers should ensure separation and coordinate but pilots follow TCAS
• C. It replaces ATC directives
• D. It is a weather radar

Answer: (B)

TCAS stands for Traffic Collision Avoidance System. It’s an airborne system that detects the risk of a collision with other aircraft by interrogating surrounding transponders and can issue resolution advisories directly to pilots to avoid an intrusion. The important part for controllers is that ATC still works to maintain overall separation and coordinates traffic flow, but when a TCAS RA is emitted, the pilot must follow the TCAS instruction, and ATC should support the situation by managing other traffic and minimizing conflicts without countermanding the TCAS maneuver. So the best answer correctly identifies the system and describes the division of responsibilities: pilots follow TCAS, while controllers ensure separation and coordinate. The other statements are not correct because one only mentions advisory issuance without the controller role, another wrongly suggests TCAS replaces ATC directives, and another confuses TCAS with weather radar.

TCAS stands for Traffic Collision Avoidance System. It’s an airborne system that detects the risk of a collision with other aircraft by interrogating surrounding transponders and can issue resolution advisories directly to pilots to avoid an intrusion. The important part for controllers is that ATC still works to maintain overall separation and coordinates traffic flow, but when a TCAS RA is emitted, the pilot must follow the TCAS instruction, and ATC should support the situation by managing other traffic and minimizing conflicts without countermanding the TCAS maneuver.

So the best answer correctly identifies the system and describes the division of responsibilities: pilots follow TCAS, while controllers ensure separation and coordinate. The other statements are not correct because one only mentions advisory issuance without the controller role, another wrongly suggests TCAS replaces ATC directives, and another confuses TCAS with weather radar.