Abstract: A submerged buoyant floating platform with blocked vertical thrust. Above the platform an electrolyser may be placed inside a hollow container. Under the platform may be a hollow container filled with ballast, connected by pipes or chains to the outer ring of the platform which provide rigidity to the entire structure. A storage tank for the hydrogen produced by the electrolyser may be attached to the hollow container. The entire structure may be anchored with chains attached to bottom weights sitting on the ocean floor. The structure may be used as a support for a tower including a wind turbine. Additional chains attached to the structure bottom weights on the sea floor may link the structure to an aquaculture facility and to floats which hold the cages used in aquaculture. The floats may be linked to additional bottom weights placed on the sea floor.