There is no complete, systematic simulation available in procedure control because of discon-nection among tower control service, approach control service and area control service.
在程序管制模拟练习中，存在着塔台管制服务、进近管制服务和区域管制服务互不衔接，不能系统地模拟整个管制过程的问题。
Tower control
英语例句库
原声例句
商业周刊
Six floors above him in the port's control tower, Bannister surveys the now packed facilities.
班尼斯特在港口控制塔的六层，查看着现在拥挤不堪的设施。
英语百科
Air traffic control
Air traffic control (ATC) is a service provided by ground-based controllers who direct aircraft on the ground and through controlled airspace, and can provide advisory services to aircraft in non-controlled airspace. The primary purpose of ATC worldwide is to prevent collisions, organize and expedite the flow of air traffic, and provide information and other support for pilots. In some countries, ATC plays a security or defensive role, or is operated by the military.
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