Which airspace is described as existing everywhere not classified as A, B, C, or D and commonly begins at 700 or 1,200 feet AGL to 17,999 feet MSL?

• A. Class E
• B. Class F
• C. Class G
• D. Class A

Answer: (A)

Understanding airspace classes and where Class E fits. This space exists everywhere that isn’t designated A, B, C, or D, and its base can vary. It commonly begins at 700 feet AGL or 1,200 feet AGL and extends up to 17,999 feet MSL, just below where Class A starts at 18,000 feet MSL. This makes it the main body of controlled airspace that covers most of the skies below Class A and above Class G. Some areas also have Class E starting at the surface, but the typical description given—base at 700 or 1,200 AGL up to 17,999 MSL—matches Class E. The other classes are more restricted: Class A begins at 18,000 MSL, and Classes B, C, and D surround specific airports with their own shapes and rules, while Class G is the uncontrolled airspace below the base of Class E.