Bay Shipbuilding Company (BSC) is a shipyard and dry dock company in Sturgeon Bay, Door County, Wisconsin. As of 2015, Bay Ships was a subsidiary of Fincantieri Marine Group and produces articulated tug and barges, OPA-90 compliant double hull tank ships and offshore support vessels. It also provides repair services to the lake freighter fleet. In the past the shipyard located in Sturgeon Bay has operated under several different names and traces its history back to 1918. The company also built 40,000 ton Lake freighters in the 1970s and 1980s. While capable of producing large freighters, the yard has not built a freighter over 20,000 tons since 1987. Former names of the shipyards at the 2015 location of Bay Shipbuilding are: Sturgeon Bay Shipbuilding, Leathem D. Smith Shipbuilding Company