airborne collision avoidance system

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airborne collision avoidance system

[′er‚bȯrn kə′lizh·ən ə′vȯid·əns ‚sis·təm]
A navigation system for preventing collisions between aircraft that relies primarily on equipment carried on the aircraft itself, but which may make use of equipment already employed in the ground-based air-traffic control system. Abbreviated ACAS.

airborne collision avoidance system (ACAS)

airborne collision avoidance system (ACAS)click for a larger image
Typical function block diagram of airborne collision avoidance system.
An aircraft system based on SSR (secondary surveillance radar) transponder signals which operates independently of ground-based equipments to provide advice to the pilot on potential conflicting aircraft that are equipped with SSR transponders (ICAO). The system alerts the pilot to conflicting air traffic.
References in periodicals archive ?
Safety enhancing avionics such as Terrain Awareness Warning Systems, airborne collision avoidance systems can be added to the standard avionic configuration.
However, Eurocontrol last night said both aircraft were ``well within limits'' of the new elevation system, adding that both planes were equipped with airborne collision avoidance systems.
NYSE:ALD) Thursday announced that it has been selected by Russian flagship carrier Aeroflot to supply Airborne Collision Avoidance Systems (ACAS II) for Aeroflot's eight Ilyushin IL-76 transport cargo airplanes.
NYSE:ALD) Thursday announced that it has obtained the first two Technical Standard Order (TSO) approvals from the United States Federal Aviation Administration (FAA) for new Airborne Collision Avoidance Systems (ACAS II).

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