The badly damaged hulk of HMAS DERWENT was finally scuttled, by charges set by CDT 4, in deep water to the west of Rottnest Island, WA.
During the previous 10 weeks, the old ship had been subjected to a series of tests by DSTO staff, to observe the affect of bomb and shell damage on a warship. Due to the damage to the vessel she was sunk in very deep water to prevent divers attempting to dive on the wreck.