题目内容

The distance by which an aircraft avoids obstacles or other aircraft is termed _______.

A. separation
B. limit
C. clearance
D. route

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The most important concept of IFR flying is that separation is maintained ________weather conditions.

A. based on
B. regardless of
C. as a result of
D. because of

In controlled airspace, ATC separates IFR aircraft from obstacles and other aircraft using a flight clearance _______ route, distance and speed.

A. due to
B. because of
C. regardless of
D. based on

ATC monitors IFR flights on radar, or through procedural control where radar coverage is not ______ .

A. necessary
B. available
C. needed
D. sufficient

Aircraft position reports are ______ if ATC can see an aircraft on radar.

A. required
B. necessary
C. unnecessary
D. possible