“…Huffington and Clifford [1939] describe the many restrictions on a yard' s location, which put a high price on the production of sailing ships that was incurred even before the yard is built. To keep the costs of transportation down, they explain that shipyards needed to be located on a river or estuary, allowing ships to be built "without fear of wreck" (Huffington and Clifford [1939] p.363). At the same time, however, the yards needed to be close to bog ore and forge sites, which provided iron for ship fittings, and forests abundant in oak and pine, which provided wood for the hulls and masts.…”