Diamantina Fracture Zone Ridge Plateau. All these features are mirrored by corresponding topography on the other side of the Southeast Indian Ridge. Broken Ridge Plateau was formed at the ridge together with the Kerguelen Plateau. Diamantina Fracture Zone was first detected by and RV Argo in 1960. It is named after , which did further exploration in 1961. The Diamantina Deep is the zone's deepest location, located about 1 125 km West-South-West of Perth, Western Australia, at . This is not the deepest point in the Indian Ocean: the CIA's Physical Map of the World lists the Java Trench as such. On the
HMAS Diamantina (K377) High Command to the surrender of Torokina on 8 September 1945. She was also involved in the surrenders of Nauru on 13 September and Ocean Island on 1 October; both ceremonies conducted on her quarterdeck. "Diamantina" returned to Sydney, arriving at Garden Island on 13 December 1945, with 78 passengers embarked. The ship remained in Sydney until 1 February 1946, when she departed for a patrol in New Guinea waters. "Diamantina" returned to Sydney in mid-June, and after sailing to Williamstown was paid off into reserve on 9 August 1946. The ship was awarded the battle honour "Pacific 1945" for