Detyens Shipyards, Inc. Is a unified group of full-service shipyards, each covering a slightly different segment of the repair market. William Detyens, a merchant mariner who saw a need for a new ship repair service in the Charleston, South Carolina area, started Detyens in 1961. The company prospered and grew, servicing both the commercial and naval markets. Mr. D. Loy Stewart, Detyens’ son-in-law, bought the yard in the 1980s and started a new growth era. At that time naval ship repair was a major business segment for the company and a second site (Shipyard River) opened in Charleston to handle the workload. In the mid 1990s, when the US Navy was downsizing, Detyens leased the shipyard segment of the old Charleston Naval Facility on the Cooper River. This included three large graving docks, machine shops, portal cranes and all the support structure necessary for a shipyard of this size.