Australian Hospital Ship (AHS) Centaur was a hospital ship which was attacked and sunk by a Japanese submarine off the coast of Queensland, Australia, on 14 May 1943. Of the 332 medical personnel and civilian crew aboard, 268 were killed.

The Scottish-built vessel was launched in 1924 as a combination passenger liner/freighter and operated a trade route between Western Australia and Singapore via Indonesia, carrying passengers, cargo, and livestock. Centaur served in both civilian and military capabilities during her career, and she was involved in recovering German survivors of the engagement between Kormoran and HMAS Sydney.

Following her early-1943 conversion to a hospital ship, Centaur served as a medical transport between New Guinea and Australia. Before dawn on 14 May 1943, while on her second voyage, Centaur was torpedoed and sunk by a Japanese submarine off North Stradbroke Island, Queensland. The majority of the 332 aboard died in the attack; the 64 survivors had to wait for 36 hours before they were rescued. The attack resulted in public outrage as it was considered to be a war crime. Protests were made by the Australian and British governments to Japan and efforts were made to discover the people responsible so they could be tried at a war crimes tribunal. Despite this, it was not until the 1970s that identity of the attacking submarine, I-177, became public.

John Brough Scott, MBE (born 12 December 1942) is a British horse racing journalist, radio and television presenter, and former jockey. He is also the grandson and biographer of the noted Great War soldier "Galloper Jack" Seely.

He was educated at Radley College and Corpus Christi College, Oxford, where he read History. His riding career saw him ride over 100 winners including the Imperial Cup and Mandarin Chase. He joined ITV in 1971, and was regularly seen and heard on The ITV Seven and later Channel 4 Racing. He also briefly presented football coverage for Channel 5. He was racing correspondent for The Sunday Times and wrote for the Racing Post, The Independent on Sunday and The Sunday Telegraph. He was awarded an MBE in the Queen's birthday honours list in 2009.