What is the radius of the outer circle of Class C airspace?

The outer circle of Class C airspace has a radius of 10 nautical miles (NM). This configuration typically surrounds the primary airport within the Class C airspace, which provides essential services and air traffic control to both VFR (Visual Flight Rules) and IFR (Instrument Flight Rules) traffic. The designated Class C airspace structure comprises an inner core with a radius of 5 NM that extends vertically up to 4,000 feet above the airport elevation, along with the outer circle that spans from 5 NM to 10 NM.

In this context, the separation of classes of airspace is instrumental for managing the safety and efficiency of air traffic operations. Class C airspace is specially designated to maintain a buffer zone around busy airports and ensure aircraft separation, enhancing safety during both takeoffs and landings. Understanding the dimensions of Class C airspace is crucial for pilots and air traffic controllers, enabling them to navigate through these areas effectively while adhering to the required communication and clearance procedures.