What 'rush hour' looks like in New York on the TCAS system. (Alamy) Authorities believe everyone on board a passenger plane and a US Army helicopter that collided in mid-air before crashing into a ...
Known as the Airborne Collision Avoidance System (ACAS) or Traffic Alert Collision Avoidance System (TCAS), it is a system designed to help increase cockpit awareness of neighboring aircraft and is ...
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