助航灯光系统作为民航机场航空器进近目视系统是机场保障正常运行的重要环节之一。
Airfield lighting system as a civil airport near visual system is an important link to maintain normal airport.
我们能见机场，请求目视进近。
UPS70, we have the airport in sight, request visual approach.
为什么像进近，塔台，地面这种频率在某些机场没有分开为几个个频率？
Why aren't the frequencies like approach, tower, and ground separated on some airports?
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