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traffic alert and collision avoidance system

avia., Canada A type of airborne collision avoidance system ACAS based on a family of airborne equipment that functions independently of the ground-based ATC system to detect potential conflicting aircraft that are equipped with secondary surveillance radar SSR transponders. There are three different versions: TCAS I provides traffic advisories; TCAS II provides traffic advisories and vertical resolution advisories RA; and TCAS IV, when developed, will provide traffic advisories and vertical and horizontal RAs.
Traffic Alert and Collision Avoidance System
abbr. TCAS system (MichaelBurov)
abbr., avia. TCAS (MichaelBurov)
transp., abbr. TCAS
traffic
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