HMAS Diamantina (K377) deepest known part of the Indian Ocean on 7 February 1960, which was named Diamantina Deep after the ship. Based in Fremantle, Western Australia, "Diamantina" remained in service as an oceanographic vessel until 1980; she briefly interrupted these duties in March 1963, escorting the royal yacht during Queen Elizabeth II's tour to Australia. "Diamantina" paid off from the RAN on 29 February 1980, and was the last World War II-era frigate to serve Australia. "Diamantina" was handed over to the Queensland Maritime Museum to be permanently berthed in the South Brisbane Dry Dock located on the Brisbane River at South
HMAS Diamantina (K377) complement of 140. "Diamantina" was laid down on 12 April 1943 at Walkers Limited in Maryborough, Queensland. She was launched on 6 April 1944, and commissioned into the RAN at Hervey Bay, Queensland, on 27 April 1945 carrying pennant number K377. She was named for the Diamantina River in Queensland, and was one of eight River-class frigates built for the RAN during World War II. After commissioning, "Diamantina" sailed to Sydney, New South Wales, remaining there until late May when she embarked for New Guinea to complete her trials. These were concluded in June 1945 and by the end of