Detyens Shipyards Inc. Located in the historic city of Charleston, South Carolina, is busy building a tradition of quality workmanship at a reasonable price. Detyens’ main yard, located on the Cooper River in Charleston, was originally a U.S. Naval shipyard. In 1996 the Navy closed their base and Detyens, which had been operating at a smaller shipyard on the Wando River in Mt. Pleasant, SC, saw an opportunity