Which airport within D66 is in uncontrolled airspace (Class G)?

Which airport within D66 is in uncontrolled airspace (Class G)?

• A. KGWO - Greenwood
• B. 0M8 - Byerley
• C. KVKS - Vicksburg Airport
• D. KTVR - Tallulah Airport

Answer: (B)

This question tests how airspace classes apply to real airports. Uncontrolled airspace, Class G, exists from the surface up to the base of the overlying controlled airspace. In most areas that base is either 700 feet AGL or 1,200 feet AGL. So an airport sits in Class G only if there is no controlled airspace starting at or near the surface above it. Within the D66 area, Byerley (0M8) is located where there isn’t any lower boundary of Class E overhead, so from the surface up to the base of the surrounding Class E airspace, the airspace remains Class G. The other nearby airports lie beneath controlled airspace boundaries that begin at a low altitude or at the surface itself, meaning those locations are not in Class G. So Byerley is the one in uncontrolled airspace.

This question tests how airspace classes apply to real airports. Uncontrolled airspace, Class G, exists from the surface up to the base of the overlying controlled airspace. In most areas that base is either 700 feet AGL or 1,200 feet AGL. So an airport sits in Class G only if there is no controlled airspace starting at or near the surface above it.

Within the D66 area, Byerley (0M8) is located where there isn’t any lower boundary of Class E overhead, so from the surface up to the base of the surrounding Class E airspace, the airspace remains Class G. The other nearby airports lie beneath controlled airspace boundaries that begin at a low altitude or at the surface itself, meaning those locations are not in Class G. So Byerley is the one in uncontrolled airspace.