What is the typical vertical limit of Class C airspace above the primary airport?

Class C airspace typically extends vertically from the surface up to 4,000 feet above ground level (AGL) at the primary airport. This structure is designed to accommodate the air traffic operating in and around the airport, as well as to ensure safe separation between aircraft during takeoff, landing, and transit through the airspace.

The airspace usually has a core that extends from the surface to 4,000 feet AGL surrounding the primary airport, while a larger area typically extends from 1,200 feet AGL to 4,000 feet AGL. This configuration helps manage the flow of traffic and maintain safe distances between aircraft as they approach or depart the airport.

Understanding these vertical limits is essential for pilots to recognize the controlled airspace they are entering and to comply with required communication and separation protocols while operating within Class C airspace.