The hull ex-HMAS ADROIT was sunk as a target off the WA coast by A4 Skyhawks of the RNZAF.
HMAS DERWENT was decommissioned at HMAS STIRLING after a 30-year career which saw her steam in excess of 800,000 miles. Her hull was later used as a guinea pig for blast and fragmentation tests, organized by scientists from the Defence Science and Technology Organisation, (DSTO), led by CMDR J. Mathias, RAN. The team observed the effect of damage caused by bombs and shells on the old ship in order to make improvements for ship survivability. DERWENT had the distinction to be the first RAN vessel to fire a guided missile on 25 May 1964, less than a month after commissioning.