14 C.F.R. § 25.751 Main float buoyancy.
Title 14 - Aeronautics and Space
Each main float must have— (a) A buoyancy of 80 percent in excess of that required to support the maximum weight of the seaplane or amphibian in fresh water; and (b) Not less than five watertight compartments approximately equal in volume.
Title 14: Aeronautics and Space
PART 25—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
Subpart D—Design and Construction
Floats and Hulls
§ 25.751 Main float buoyancy.
