题目内容
Directions: Choose no more than three words from the text to complete the following sentences.Over the years of aviation development, pilots have used bonfires, ________________ and radio navaids for air navigation.
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VORenables aircraft to determine their____________ and stay ________________by receiving radio signals transmitted from a network of ground radio beacons.
The signals the a VOR station sends out are a ______________ and a highly _______________ secondary signal.
The ______________of an aircraft to the ground radio station can be determined by comparing the _____________of the secondary signal to the master.
The VOR display in the cockpit includes a rotating course card, the OBS, the CDI, and the _________________________.
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