Forty 1 (U.S. Navy) The Forty 1, within the context of the U.S. Navy, refers to a specific model of naval vessel. However, specific details about this particular ship are not immediately available as it could refer to several types of ships used by the U.S. Navy. These might include destroyers, submarines, or other classes of vessels. The Forty 1's role within the fleet would depend on its type, with roles ranging from anti-submarine warfare, surface warfare, submersible operations, or logistics support among others. The U.S. Navy continually updates and retires vessels, making it possible that Forty 1 could represent a current vessel or one decommissioned in the past. Further research would be necessary to provide more accurate information about the Forty 1 (U.S. Navy).