题目内容

The minimum conditions for the aircraft to take off and land vary according to the type of navigation aids available, the location and height of terrain and obstructions _________ of the airport, etc.

A. in the front of
B. at the center of
C. in the vicinity of
D. at the back of

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______ is a backup system providing a last layer of defense if a sequence of errors or omissions causes a dangerous situation.

A. TAWS
B. EFIS
C. GPS
D. EICAS

In the United States even when on a filed IFR flight plan, if conditions permit the _______ is responsible to maintain a watch for, and avoid other air traffic and obstructions.

ATC
B. pilot
C. engineer
D. TCAS

Which one is not included in the radio beacons on the ground?

A. VORs
B. NDBs
C. GPS
D. GPWS

In areas of radar coverage, ATC may assign ________ to IFR aircraft, also known as radar vector.

A. track
B. heading
C. route
D. flight path