Naval Defence GalleryLong Term Exhibition | Updated 9 months ago Caption: A view of the Naval Defence gallery. Image copyright Western Australian 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 View the discussion thread.