HMAS Derwent (F22/DE 22/DE 49), named for the Derwent River, was a River class destroyer escort of the Royal Australian Navy (RAN). Commissioned in 1964, the ship operated during the Indonesia-Malaysia Confrontation, and was used for filming of the British drama series Warship. The ship was decommissioned in 1994, and was scutted as an artificial reef after use for ship survivability testsInsignia od H.M.A.S. Derwent on wooden shieldH.M.A.S. Derwenth.m.a.s. derwent