Australian Prime Minister Kevin Rudd announced the raider's discovery on the morning of 17 March. Using the wreck location and the German observations of Sydney after the battle, a search box for the cruiser was calculated. Sydney was located just after 11:00 on 17 March, only hours after Kormorans discovery was made public. Prime Minister Rudd announced the find a day later. Sydneys wreck was located at at below sea level: the bow of the cruiser had broken off as the ship sank and was located at the opposite end of a debris field stretching north-west from the hull.Cole, The Loss of HMAS Sydney II, vol. 2, p. 217 The two wrecks were apart, with Sydney to the southeast. On discovery, both wrecks were placed under the protection of the Historic Shipwrecks Act 1976. The wrecks were added to the Australian National Heritage List on 14 March 2011.Geosounder returned to Geraldton on 20 March, but delays in installing and testing the ROV prevented departure until 29 March, with the ship sailing through the path of Cyclone Pancho. Sydney was the first to be inspected; electrical problems with the ROV set the start of filming back to 3 April. Six ROV dives were made over five days, during which the main hull and debris field were inspected, filmed, and documented. The damage found by the search team corresponded with the descriptions given by Kormoran survivors after the battle. After the conclusion of ROV operations near Sydney, Geosounder travelled to the wreck of Kormoran. The search was declared complete just before midnight on 7 April. In April 2015, Curtin University and the Western Australian Museum made an expedition to the wrecks. Their objective was to use 3D imaging to map the wreck sites for further study and to determine if any deterioration since the 2008 discovery required developing a conservation management plan. During the week-long expedition, 30 hours of video footage and 700,000 still images were generated by two ROVs. Analysis Historiography The first collected historical account of the engagement was published in 1947 in George Hermon Gill's Royal Australian Navy, 1939–1942, the first of two RAN volumes in the government-sponsored Australia in the War of 1939–1945 series.Olson, Bitter Victory, p. 74 Because of the book's scope, the account of the battle was brief, and Gill accepts the German interpretation of events while blaming Burnett for endangering his ship. Naval historian Tom