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airborne collision avoidance system
transp., avia.	flygburet kollisionsavvärjande system; flygburet kollisionsvarningssystem
English thesaurus
Airborne Collision-Avoidance System
abbr., scottish	ACAS
airborne collision avoidance system
avia.	An aircraft system based on secondary surveillance radar SSR transponder signals which operates independently of ground-based equipment to provide advice to the pilot on potential conflicting aircraft that are equipped with SSR transponders. (SSR transponders referred to above are those operating in Mode C or Mode S.)
avia., Canada	An aircraft system based on secondary surveillance radar SSR transponder signals which operates independently of ground-based equipment to provide advice to the pilot on potential conflicting aircraft that are equipped with SSR transponders