Performance requirements: Land aircraft operated over water.

CFR · 2024-01-01 · US · Title 14

No person may operate a land aircraft carrying passengers over water unless— (a) It is operated at an altitude that allows it to reach land in the case of engine failure; (b) It is necessary for takeoff or landing; (c) It is a multiengine aircraft operated at a weight that will allow it to climb, with the critical engine inoperative, at least 50 feet a minute, at an altitude of 1,000 feet above the surface; or (d) It is a helicopter equipped with helicopter flotation devices.

official document · source cfr-2024 · id 14:§ 135.183