Naval Defence GalleryLong Term Exhibition | Updated 6 years ago Caption: The Naval Defence Gallery Credit: WA Museum War, peace, bravery and sacrifice. In this gallery visitors learn the important role of naval defence in protecting Australia's interests and the strategic importance of Fremantle as a marine base. Feature objects include a World War One Tenix AE2 submarine conning tower, naval weaponry and a replica of an underwater Motorised Submersible Canoe known as a Sleeping Beauty. WA Maritime Museum