E 级和 A 级空域的区别在于，在 A 级空域，所有操作都需遵照仪表飞行规则，飞行员必须要有仪表等级，也就是说，要有操作航空仪表方面的技术和执照。

The difference between Class E and A airspace is that in Class A, all operations are IFR, and pilots must be instrument-rated, that is, skilled and licensed in aircraft instrumentation.

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对于想要成为一名飞机教官的学员而言，飞行教官仪表等级是非常重要的。

The flight instructor Instrument rating is also important to students interested in preparing for employment as a flight instructor.

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仪表等级赋予飞行员控制飞机的能力，而不用参考地面或地平线，只使用飞行和导航仪表。

The Instrument Rating gives the ability to control the aircraft without reference to the ground or horizon, using flight and navigation instruments.

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