Final answer:
Class E airspace is a type of controlled airspace that extends from 1,200 feet above ground level up to, but not including, 18,000 feet above mean sea level. Above 700 feet above the surface, Class E airspace is considered uncontrolled.
Step-by-step explanation:
Class E airspace is a type of airspace designated in the United States by the Federal Aviation Administration. It is generally controlled airspace that extends from 1,200 feet above ground level up to, but not including, 18,000 feet above mean sea level.
On the other hand, airspace above 700 feet above the surface in Class E airspace is considered uncontrolled. This means that pilots are not required to have an explicit permission to enter this airspace, making it ideal for general aviation operations.
In aviation, Class E airspace refers to controlled airspace where specific regulations and requirements apply. When discussing Class E airspace above 700 feet above the surface, it typically refers to the transition between Class E airspace and other classes of airspace.
The differentiation between Class E airspace above 700 feet and other airspace classes is often relevant when considering airspace classifications in a vertical dimension. Below 700 feet AGL (Above Ground Level), the airspace may be designated differently, such as Class G airspace, which is generally uncontrolled.
The specifics may vary, and it's essential to refer to the current version of aviation regulations, such as those provided by the Federal Aviation Administration (FAA) in the United States or the relevant aviation authority in your jurisdiction, for precise and up-to-date information on airspace classifications and their delineations.