What is the upper limit of Class D airspace?

What is the upper limit of Class D airspace?

• A. 2,500 feet AGL
• B. 1,200 feet AGL
• C. 4,000 feet AGL
• D. 18,000 feet MSL

Answer: (A)

Class D airspace surrounds airports with an operating control tower and extends from the surface up to 2,500 feet above the airport’s elevation (typically read as 2,500 feet AGL near that field). This ceiling is what defines the upper limit of Class D. The other numbers refer to different airspace: 1,200 feet AGL is a common base for Class E in many areas, 4,000 feet AGL isn’t the standard D ceiling, and 18,000 feet MSL is the top of Class E (not Class D).

Class D airspace surrounds airports with an operating control tower and extends from the surface up to 2,500 feet above the airport’s elevation (typically read as 2,500 feet AGL near that field). This ceiling is what defines the upper limit of Class D. The other numbers refer to different airspace: 1,200 feet AGL is a common base for Class E in many areas, 4,000 feet AGL isn’t the standard D ceiling, and 18,000 feet MSL is the top of Class E (not Class D).