Where is Class E airspace typically found?

Class E airspace is a controlled airspace that can extend from various altitudes, primarily starting at either 700 feet AGL (Above Ground Level) or from the surface in certain areas, up to 17,999 feet MSL (Mean Sea Level). This airspace is designated to provide air traffic control at lower altitudes needed for safe maneuvers and to create a buffer zone for aircraft operations.

Specifically, Class E is found in the lower altitudes to provide controlled airspace for the operation of IFR (Instrument Flight Rules) and VFR (Visual Flight Rules) traffic, particularly in areas where there might not be a more restrictive controlled airspace class, ensuring that flight operations are safe and organized. The various definitions of Class E airspace allow for flexibility in the air traffic management system, accommodating both civil and commercial aviation needs.

Other altitude options, such as the surface to 2,500 feet or uncontrolled airspace definitions, do not capture the full scope of where Class E airspace exists, which is more extensive when considering its upper limit alongside its starting altitude characteristics.