What are the dimensions of Class C airspace?

Class C airspace is structured to manage the flow of air traffic around busy airports, providing a safe buffer for both arriving and departing aircraft. The correct specification for Class C airspace includes a core area that typically has a 5 nautical mile radius from the surface, along with an outer area that extends for 10 nautical miles, starting at 1,200 feet above ground level and going up to 4,000 feet. This layered approach allows for effective separation of aircraft and establishes controlled airspace where air traffic control services are provided.

Understanding these dimensions is crucial for pilots operating in or near Class C airspace, as it helps them comply with the necessary communication and clearance requirements while ensuring safe and efficient traffic management. The other options do not accurately represent the structured dimensions of Class C airspace, as they either do not include the necessary parameters of altitude and radius or provide incorrect measurements.