HMAS Castlemaine (J244/M244/A248), named for the city of Castlemaine, Victoria, was one of 60 Bathurst-class corvettes constructed during World War II, and one of 36 initially crewed and commissioned solely by the Royal Australian Navy (RAN).
Launched in 1941 and commissioned in 1942, Castlemaine operated during World War II in the waters of Australia, New Guinea, and Timor. She remained in service until 1945, when she was decommissioned into reserve and converted into an immobilised training ship. In 1973, Castlemaine was presented to the Maritime Trust of Australia for conversion to a museum ship. She is one of two surviving examples of the Bathurst class, the other being HMAS Whyalla.
Design and construction
In 1938, the Australian Commonwealth Naval Board (ACNB) identified the need for a general purpose 'local defence vessel' capable of both anti-submarine and mine-warfare duties, while easy to construct and operate. The vessel was initially envisaged as having a displacement of approximately 500 tons, a speed of at least , and a range of . The opportunity to build a prototype in the place of a cancelled Bar-class boom defence vessel saw the proposed design increased to a 680-ton vessel, with a top speed, and a range of , armed with a 4-inch gun, equipped with asdic, and able to fitted with either depth charges or minesweeping equipment depending on the planned operations: although closer in size to a sloop than a local defence vessel, the resulting increased capabilities were accepted due to advantages over British-designed mine warfare and anti-submarine vessels. Construction of the prototype did not go ahead, but the plans were retained. The need for locally built 'all-rounder' vessels at the start of World War II saw the "Australian Minesweepers" (designated as such to hide their anti-submarine capability, but popularly referred to as "corvettes") approved in September 1939, with 60 constructed during the course of the war: 36 (including Castlemaine) ordered by the RAN, 20 ordered by the British Admiralty but crewed and commissioned as RAN vessels, and 4 for the Royal Indian Navy.
Castlemaine was laid down by HMA Naval Dockyard in Williamstown, Victoria on 17 February 1941. She was launched on 7 August 1941 by Dame Pattie Menzies, wife of the then Prime Minister of Australia, Sir Robert Menzies. The corvette was commissioned into the RAN at Melbourne on 17 June 1942.
Operational history
After commissioning, Castlemaine sailed to Sydney, where she was involved in training exercises and convoy escort along the east coast of Australia. On the night of 11 August 1942, the corvette collided with a Manly ferry, requiring a week of repairs at Cockatoo Island Dockyard.
After repairs, Castlemaine was ordered to Townsville, then assigned to Darwin in October: at both locations the ship was tasked with supporting and supplying Allied guerrilla operations in Timor. In late November 1942, the RAN was called on to evacuate the commandoes of the 2/2nd Independent Company (an evacuation attempt in September failed when the destroyer grounded and was scuttled after being badly damaged by attacking Japanese aircraft), a contingent of Dutch troops, and over 100 Portuguese civilians, while delivering a relief contingent. Castlemaine, sister ship , and the auxiliary patrol boat were assigned to the operation by Commodore Cuthbert Pope, Naval Officer in Charge Darwin, with Castlemaine the commanding ship. The plan was for Kuru to reach Betano Bay early on the night of 30 November, offload supplies, and take on the civilians. The two corvettes were to arrive two hours later; Kuru would deliver her passengers to Castlemaine, which was to head for Darwin at first opportunity, then shuttle relief troops aboard Armidale to shore while evacuating the soldiers.