This is a shipwreck of the HMVS Cerberus, less than 200m from the shore of Black Rock and in about 3m deep of water.A naval ship build in 1870 to defend Port Phillip Bay. Not long after they found out its weapons and boilers were inoperable and the ship was re-tasked as a guardship and ammunition store. Cerberus was sold to Melbourne Salvage Company for £409 in 1924. After being disassembled at Williamstown Naval Dockyard to remove scrap, the remaining parts were resold to Sandringham council for £150 in 1926 for sinking in Half Moon Bay to serve as a breakwater for the Black Rock Yacht Club.
In 1993, due to a major structural collapse, Cerberus began to subside at 16 mm per year. Following this, a 100m exclusion zone was placed around the wreck. In 2002, Friends of the Cerberus was formed to promote preservation of HMVS Cerberus. In October 2004, the Victorian government provided an A$80,000 grant to remove the four 18-ton guns from Cerberus, reducing the load placed on its deck. The guns were coated with preservative, electrolyzed and placed on the seabed next to the wreck. Cerberus was listed on the Victorian Heritage Register in 2005. In July 2008, A$500,000 of federal funding was made available for its structural preservation, with the work scheduled to start in 2011.