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traffic alert and collision avoidance system
avia.	交通警告和防撞系统
el.	交通报警与防撞系统
mil., air.def.	空中交通告警与防撞系统
Traffic Alert and Collision Avoidance System
avia.	空中交通告警及防撞系统
English thesaurus
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