18,000 MSL (FL 180) 10,000 MSL sport pilot limit Class E controlled airspace  Class E controlled airspace  Class A Class E drops to ground around some airports Class E drops to 700 feet AGL over many airports Class G above 1,200 feet AGL in some areas Class uncontrolled airspace AGL—above ground level  FL—flight level  MSL—mean sea level 1,200' AGL everywhere$_{not marked on sectional}$ Figure 8-2. Class G uncontrolled airspace and Class E controlled airspace. 60,000 MSL (FL 600) 18,000 MSL (FL 180) 10,000 MSL Sport Pilot Limit Class A Class E Class B Class C 4,000' AGL Class D 2,500' AGL Class G Class G Class G Class G 700' AGL 1,200' AGL Class E AGL—above ground level  FL—flight level  MSL—mean sea level 700' AGL 1,200' AGL 1,200' AGL Figure 8-3. Class G airspace extends from the surface to the base of controlled airspace (Class B, C, D, and E). 8-3