Abstract: The present invention relates to a pontoon unit 1 intended for an energy generation system 2, said pontoon unit 1 comprising one first water surface pontoon part 3 having an unsymmetrical convexly curved inner surface X, a second water surface pontoon part 4 having an unsymmetrical convexly curved inner surface Y, and one bottom pontoon part 5 being substantially perpendicular to the first and second water surface pontoon parts 3, 4 and also having an unsymmetrical convexly curved inner surface Z.

Abstract: A protective device for flooding, comprising a protective cloth provided in a housing and a float connected to the protective cloth. The housing is formed as boxes having elongated sides and open gable ends. Side edges of the protective cloth in the housing are connected to one another for providing a waterproof connection to protective cloths of adjacent housings. A protective cloth for flooding comprises at least one float provided along an edge of the protective cloth, and float elements are provided spaced apart along the surface of the protective cloth.