HMAS Maryborough (J195/B248/A122), named for the city of Maryborough, Queensland, was one of 60 Bathurst-class corvettes constructed during World War II, and one of 20 built on Admiralty order but manned by personnel of and commissioned into the Royal Australian Navy (RAN). She was the first naval vessel built in Queensland for the Royal Australian Navy during World War II.
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 ordered by the RAN, 20 (including Maryborough) ordered by the British Admiralty but manned and commissioned as RAN vessels, and 4 for the Royal Indian Navy. From November 1942 until December 1944, Maryborough was assigned to the British Eastern Fleet.
For her wartime service, the corvette was awarded three battle honours: "Pacific 1942", "Indian Ocean 1942–44", and "Sicily 1943".
Fate
Maryborough paid off in December 1945, and was sold to the Australian General Trading and Shipping Syndicate on 9 May 1947, who renamed her Isobel Queen. She was later sold for scrap to Carr Enterprises in Brisbane, in 1953.