仪表飞行 flight in instrument conditions; flying on instruments; ifr flight; ifr operat ... 仪表飞行卡 instrument card ..
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IFR flight plan 仪器飞行计划
daylight ifr flight 昼间复杂气象飞行
night IFR flight 夜间复杂气象飞行
abbreviated ifr flight plan 简式仪表飞行规则的飞行计划
IFR Instrument Flight Rules 仪表飞行规则
IFR Instrument Flight Rule 仪表飞行法则
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。
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