题目内容
When the aircraft approaches its destination, ______ is responsible for meeting altitude restrictions by specific points.
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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.
ACC may require numerous radar systems to cover the airspace assigned to them, and may also rely on _______ from aircraft flying below the floor of radar coverage.
The ocean areas are also _______.
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