Bath Iron Works (BIW) is a major American shipyard located on the Kennebec River in Bath, Maine, United States. Since its founding in 1884 (as Bath Iron Works, Limited), BIW has built private, commercial and military vessels, most of which have been ordered by the United States Navy. The shipyard has built and sometimes designed battleships, frigates, cruisers and destroyers, including the Arleigh Burke class, which are currently among the world's most advanced surface warships.