airborne collision avoidance system(redirected from Aircraft 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.