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The communication frequency for VOR is between _______ .

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Area navigation system has _______ operational capabilities.

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The farthest distance the weather radar can detect is _______ mi

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At the landing phase, to avoid the wake turbulence of preceding

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The numbering of domestic regional air lines falls into two cate

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_______ can be started up when flying in the air.

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Overloading refers to _______ .

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Code _______ is available for provisional use by relevant contro

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SAS991, are you _______ for immediate departure?

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CTL：JAL175, _______.

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