题目内容
The hand-over process continues until the aircraft is handed off to a ________.
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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.
Long range radar has the capability to see aircraft within 200 nautical miles of the radar _____ at higher altitude.
When the area is not covered by the long range radar, the centers may also use _______ data to control the aircrafts.
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