What is the minimum height above surface for uncontrolled airspace below 1,000 feet AGL?

What is the minimum height above surface for uncontrolled airspace below 1,000 feet AGL?

• A. 100 feet
• B. 200 feet
• C. 500 feet
• D. 250 feet

Answer: (D)

Uncontrolled airspace is Class G, which has no ATC service. It extends from the surface up to the base of the overlying controlled airspace (Class E). For operations under 1,000 feet above the surface, the base of Class E isn’t fixed everywhere; in some locations it can begin as low as 250 feet AGL. That means the portion of airspace that remains uncontrolled beneath 1,000 feet AGL can be as shallow as 250 feet above the surface. Because actual airspace bases vary by location, you should always check the current sectional charts or UAS facility maps for the exact base elevations where you plan to operate.

Uncontrolled airspace is Class G, which has no ATC service. It extends from the surface up to the base of the overlying controlled airspace (Class E). For operations under 1,000 feet above the surface, the base of Class E isn’t fixed everywhere; in some locations it can begin as low as 250 feet AGL. That means the portion of airspace that remains uncontrolled beneath 1,000 feet AGL can be as shallow as 250 feet above the surface. Because actual airspace bases vary by location, you should always check the current sectional charts or UAS facility maps for the exact base elevations where you plan to operate.