Barges, flat top barges and pontoons for heavy loads are used for shipping and interim storage of wind turbines, rotor blades, monopiles, jacket foundations and all other large/heavy elements in the offshore sector. In addition to standard flat top barges, the market offers special heavy load barges with reinforced cargo decks; semi-sub barges, which are able to submerge by means of picking up ballast and, as a result, can load and offload floating loads; and launch barges, which are used to tilt steel constructions / jacket foundations with the same method.