Class E airspace generally includes what type of airspace?

Class E airspace is primarily defined as any airspace that is not specifically classified as Class A, B, C, or D. It serves as a transition zone between controlled and uncontrolled airspace and encompasses a variety of airspace types where specific operational rules apply. This classification allows for flexibility in air traffic management and provides controlled space for instrument flight rules (IFR) operations.

Within Class E airspace, you can find areas designated for various purposes, such as airways, transition areas, and airspace around airports that do not meet the requirements for the other classes. This ensures that there is adequate coverage for flights operating under IFR as well as visual flight rules (VFR) in certain conditions, thus enhancing overall safety in the national airspace system.

The other options do not accurately characterize Class E airspace. Military airspace, uncontrolled airspace, and restricted airspace each have their definitions and criteria that do not encompass the broader nature of Class E, which is specifically meant to include any airspace outside of the other designated classes.