Definition of Ground Level for Recreational Operations

In plain language

The 400-foot limit is measured from the actual ground, not from the top of a building, tree, or other structure. If you launch from a 10-story rooftop, you cannot fly 400 feet above that rooftop; your limit is still 400 feet above the actual ground.

Requirement as structured

Defines 'ground level' as starting at the Earth's surface, excluding man-made structures, trees, or obstacles, meaning launching from a structure does not grant extra altitude.

Original regulatory text

“Ground level” begins at the Earth’s surface and does not include man-made structures, trees, or any obstacle. For example, a UA engaged in recreational operations under 49 U.S.C. § 44809(a) may not be launched from a 10-story rooftop and fly up an additional 400 feet.

Applies when

country

United States

operation

recreational

operation regime

recreational

regulatory category

General