Class C Airspace is a type of controlled airspace that surrounds major airports. It typically extends from the surface up to 4,000 feet above ground level. This airspace is designed to manage the flow of air traffic, ensuring safety for both commercial and general aviation flights. In Class C Airspace, pilots must communicate with air traffic control (ATC) before entering. Aircraft operating in this airspace are required to have a transponder that provides their location to ATC. This helps maintain safe distances between aircraft and facilitates efficient traffic management around busy airports.