A family’s decadeslong mission to honor a World War II naval commander and those lost aboard his ship culminated Father’s Day weekend at a shipwreck site about 30 miles off the coast of Cape May. Doug Black and other relatives traveled aboard the research vessel Explorer to the wreck of the USS Jacob Jones, a Navy destroyer that was torpedoed and sunk by a German submarine in 1942. Among the 138 people who died was the ship’s commanding officer,…