| 单词 | airborne collision avoidance system | 
| 释义 | airborne collision avoidance system [`er´bȯrn kǝ`lizh·ǝn ǝ`vȯid·ǝns ´sis·tǝm]  NAVIGATION 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.  | 
	
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