HMAS Castlemaine

HMAS Castlemaine 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. 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 10 knots (19 km/h; 12 mph), and a range of 2,000 nautical miles (3,700 km; 2,300 mi). 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 15.5 knots (28.7 km/h; 17.8 mph) top speed, and a range of 2,850 nautical miles (5,280 km; 3,280 mi), 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 HMAS Kangaroo 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.