Certified Flight Instructor (CFI) Practice Exam

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Where does Class E airspace typically start in the United States?

At 18,000 feet MSL

At 14,500 feet MSL

Class E airspace in the United States typically starts at 14,500 feet MSL. This classification of airspace is designed to facilitate control of both IFR and VFR flights and extend upwards to, but not including, 18,000 feet MSL, which marks the beginning of Class A airspace.

Class E airspace can also start from the surface, especially in areas that require additional airspace for the purpose of air traffic control, such as near airports. This dual nature allows for greater flexibility depending on geographic and operational needs. However, the broader structure dictates that the more common starting point for Class E, particularly in less congested areas, is at 14,500 feet MSL, excluding certain designated locations and controlled airspace surrounding airports.

Understanding this structure is crucial for pilots as it affects their navigation and communications requirements, especially when transitioning between different classes of airspace.

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At the surface

At 10,000 feet MSL

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