“VFR on top”的概念、定义、翻译、参考文献-科学参考

单词	VFR on top
释义	VFR on top [´vē´ef`är ȯn `täp] ^{AEROSPACE ENGINEERING} A flight condition wherein an aircraft is operated under modified visual flight rules while in flight above a layer of clouds or an obscuring phenomenon sufficient to constitute a ceiling.
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