Savannah Class C airspace shelf floor is 1,300 ft MSL.

• A. 1,000 ft MSL
• B. 1,300 ft MSL
• C. 1,500 ft MSL
• D. 2,000 ft MSL

Answer: (B)

Class C shelves are built with a floor that is typically 1,200 feet above the airport, expressed as 1,200 ft AGL. To know the actual altitude in MSL, you add the airport’s elevation to that 1,200 ft. For Savannah, the airport elevation is about 100 ft MSL, so the shelf floor ends up around 1,300 ft MSL. That’s why the stated shelf floor of 1,300 ft MSL is the correct value. The other numbers would require different airport elevations and do not match Savannah’s elevation, so they don’t fit.