At what altitude does Class E airspace typically begin when not depicted on charts?

Class E airspace typically begins at an altitude of 14,500 feet MSL when it is not explicitly depicted on charts. This designation is part of the national airspace system, which outlines various classes of airspace with different rules and regulations regarding air traffic control and flight operations.

In areas designated as Class E, airspace begins at a floor of 14,500 feet MSL up to 18,000 feet MSL, where the airspace transitions to Class A. Understanding that Class E airspace serves as a buffer for increasing air traffic and for the safe operation of aircraft in the lower flight levels is essential for pilots. This organization allows for both controlled and uncontrolled flight operations while managing the complexity of airspace efficiently.

In lower elevations, such as below 1,200 feet MSL or 10,000 feet MSL, Class E may be found, but typically those lower altitudes are designated for different classes of airspace, such as Class G, which is uncontrolled. Thus, recognizing the altitude threshold of 14,500 feet MSL is crucial for pilot navigation and ensures compliance with regulatory requirements.