 "Dubbo" was laid down by Mort's Dock and Engineering Company at Balmain, New South Wales on 13 October 1941.She was launched on 7 March 1942 by Mrs. E. B. Scrisier, Mayoress of Dubbo, and was commissioned into the RAN on 31 July 1942.From 1942 until March 1945, "Dubbo" was assigned to convoy escort anti-submarine duties off the western Australian coast.