Which of the following is NOT a type of airspace classification?

Class H is not an official classification of airspace in the United States. The classification of airspace is designed to help manage and organize the airspace according to its usage and the type of aircraft operating within it.

Class A, Class B, Class C, Class D, Class E, and Class G represent the recognized classifications of airspace. Class A is primarily for high-altitude jet traffic, requiring specific flight rules and aircraft types. Class B encompasses areas around busy airports, while Class C and Class D serve airports with operational control towers but differing levels of traffic complexity. Class E can be mixed-use airspace where more flexible rules apply, while Class G represents uncontrolled airspace where there are few regulations governing operations.

The absence of Class H in airspace classifications highlights the structured approach of the FAA towards ensuring safety and efficiency in aviation operations.