Abstract: A concrete vessel is provided with a loading and unloading system, in which the vessel has an inner hull skin which is generally cylindrically curved. An outer hull skin is provided, which is transversally spaced from, and peripherally encloses the inner hull skin. The outer hull skin is planar on an upper side, so as to form a deck. A barge dock or hanger is located between the deck and the inner hull skin. A gate is provided in the outer hull skin between the deck and the inner hull skin for floating a barge to and from the dock or hanger.

Abstract: A monolithic concrete marine vessel hull construction includes an inner hull skin including at least two transversely interconnected, longitudinally, horizontally coextensive hull shells made of vertically slip-formed concrete. Each of these inner hull shells is generally cylindrically curved on inner and outer peripheral surfaces thereof. Each inner hull shell is closed at its opposite ends by end walls. The hull construction further includes an outer hull skin including an outer hull shell made of vertically slip-formed concrete that is transversely spaced from and peripherally encloses the inner hull skin. The outer hull skin is planar on its upper side and curved perimetrically on its lower side. There are a plurality of concrete bulkheads which extend between and effectively interconnect the inner and outer hull skins. The outer hull shell is closed at its opposite ends by bow and stern members. A concrete deck forms an integral part of the planar upper side of the outer shell.

Abstract: A marine construction includes a hull for vessel made of concrete. The hull has at least two circular cylinders and additional cylinders either outside the circular cylinders or as interposed cylinder members of triangular cross-section adjacent the at least two circular cylinders. The construction is usable for transport, storage, floating docks, submarines, aircraft carriers, and the like.