Naval History and Heritage Command

The museum possesses the largest collection of artifacts in the United States related to naval undersea history, science, and operations. Ranging in size from Trieste II, a 96-ton deep submersible, to a pressure-crushed Styrofoam cup weighing less than an ounce, these artifacts tell the story of naval exploration and operation under the sea. Highlights of the collection include the Navy's second oldest torpedo, a Confederate mine used at the Battle of Mobile Bay (1864), diving suits, and submarine battle flags.