Which classes of airspace are defined under controlled airspace by the FAA?

The correct classification of controlled airspace as defined by the FAA includes Class A, B, C, D, and E airspace. Controlled airspace encompasses all airspace where air traffic control (ATC) provides service to aircraft, ensuring safe aircraft separation and management. Class A airspace extends from 18,000 feet MSL up to FL600, primarily for high-altitude jets.

Class B airspace surrounds major airports and is designed to manage heavy air traffic, while Class C airspace is for airports with a moderate level of traffic, providing ATC services to both arriving and departing aircraft. Class D airspace surrounds airports with operational control towers and requires communication with ATC, while Class E airspace serves as the support zone for controlled operations, extending from the surface or a specified altitude up to, but not including, Class A airspace.

The mention of Class G in the incorrect choices refers to uncontrolled airspace, which does not require ATC clearance for operations. Similarly, Class F and Class I are not recognized classifications under current FAA regulations, making them invalid options.

Understanding the distinctions between these airspace classes is crucial for pilots, as it directly relates to their operational requirements and the interactions they must have with air traffic