On a clear day, a pilot in controlled airspace can choose a VFR or IFR flight plan, and the FAA regulations were devised in a way which accommodates both VFR and IFR operations in the same airspace.
在晴天，在管制空域内的飞行员可以选择目视飞行规则或者仪表飞行规则的飞行计划，而且联邦航空局的条例是以这样一种方式设计的：在同一空域同时适用目视飞行规则和仪表飞行规则的操作。
VFR night flight and IFR flight under visual conditions are also said to be possible.
VFR夜间飞行和IFR目视条件下飞行同样也是许可的。
VFR night flight and IFR flight under visual conditions are also said to be possible.
VFR夜间飞行和IFR目视条件下飞行同样也是许可的。
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