题目内容
As an aircraft reaches the boundary of a Center’s control area, it is _____ to the next ACC.
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After the hand-off, the aircraft is given a _______ change and begin talking to the next controller.
The hand-over process continues until the aircraft is handed off to a ________.
Since centers control a large airspace area, they will typically use ________.
When the aircraft approaches its destination, ______ is responsible for meeting altitude restrictions by specific points.
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