What key data does TCAS obtain from other aircraft to prevent collisions?

TCAS, or the Traffic Alert and Collision Avoidance System, is designed to enhance flight safety by preventing mid-air collisions. The essential data TCAS obtains from other aircraft includes altitude, range, and bearing information. This data is critical for determining the relative position and movement of nearby aircraft.

Altitude is vital because it allows TCAS to assess whether aircraft are at a similar flight level, which is key for vertical separation. Range indicates how far away the other aircraft is, helping assess the likelihood of a potential conflict. Bearing provides the directional information necessary to identify the trajectory of the other aircraft relative to your own, allowing for precise resolution advisories to maintain safe distances.

By using this combination of altitude, range, and bearing data, TCAS can issue timely alerts and advisories to pilots, helping them make informed decisions to avoid potential collisions effectively.