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
Diamantina River River flows as far as Lake Eyre. The length of the Diamantina River is approximately , and the basin is approximately , of which are used for agriculture. Most of the basin of the Diamantina is very flat—even the highest points in the northeast do not reach above sea level and Lake Eyre itself is below sea level. Apart from a few streams near Winton (the largest town in the basin) almost all rivers in the basin flow southwestwards towards Birdsville. The Diamantina River has no main channel, rather it is a series of wide relatively shallow channels. The major