Climb aboard two National Historic Landmark ships, the 1892 Cruiser “Olympia” and the WWII and Cold War Submarine “Becuna”. Maneuver an underwater robotic vehicle, fire a mock cannon and explore U.S. naval history. Visit the Workshop on the water to see wooden boat builders in action. Discover the atmosphere of Philadelphia’s historic shipyards with “Diligence”, the 1797 re-created gunboat once built in Philadelphia to defend this young country from pirates.