题目内容
To operate safely in IMC, a pilot controls the aircraft relying on ______, and ATC provides separation.
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Controllers ________ a set of separation standards that define the minimum distance allowed between aircraft.
During flight under IFR, there are no requirements for _______, and as such flying through clouds is permitted.
En-route air traffic controllers ______ clearances and instructions for airborne aircraft.
The higher altitude allows a flight crew to start a climb earlier in case landing is _______.
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