Class C airspace extends from the surface to what height above the airport elevation?

Class C airspace extends from the surface to what height above the airport elevation?

• A. 3,000 ft
• B. 6,000 ft
• C. 4,000 ft
• D. 8,000 ft

Answer: (C)

Class C airspace is arranged with a ceiling of 4,000 feet above the airport’s elevation. The phrase “above the airport elevation” means you add the field elevation to the 4,000 feet to get the top of the airspace in MSL. So the whole Class C block from the surface up to 4,000 feet above the airport elevation is the protected airspace for that airport. For example, if the field elevation is 500 feet, the top would be 4,500 feet MSL. The other numbers don’t match this standard ceiling, which is why 4,000 feet above the airport elevation is the correct answer.

Class C airspace is arranged with a ceiling of 4,000 feet above the airport’s elevation. The phrase “above the airport elevation” means you add the field elevation to the 4,000 feet to get the top of the airspace in MSL. So the whole Class C block from the surface up to 4,000 feet above the airport elevation is the protected airspace for that airport. For example, if the field elevation is 500 feet, the top would be 4,500 feet MSL. The other numbers don’t match this standard ceiling, which is why 4,000 feet above the airport elevation is the correct answer.