HMAS Ipswich (J186/B244/A118), named for the city of Ipswich, Queensland, was one of 60 s built during World War II and one of 20 built on Admiralty order but manned by personnel of and later commissioned into the Royal Australian Navy (RAN).
Ipswich was later operated by the Royal Netherlands Navy (RNLN) as HNLMS Morotai, and by the Indonesian Navy (TNI-AL) as KRI Hang Tuah.
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 saw the proposed design increased to a 680-ton vessel, with a top speed, and a range of , armed with a 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 Ipswich) ordered by the British Admiralty but manned and commissioned as RAN vessels, and 4 for the Royal Indian Navy.
Ipswich earned five battle honours for her wartime service: "Pacific 1942", "Indian Ocean 1942–45", "Sicily 1943", "East Indies 1944", and "Okinawa 1945".
RNLN
Ipswich paid off from RAN service on 5 July 1946 and was transferred to the Royal Netherlands Navy and renamed HNLMS Morotai.
TNI-AL
Morotai was transferred to the Indonesian Navy in 1949 and renamed KRI Hang Tuah. On 28 April 1958 a Douglas B-26 Invader aircraft, painted black and showing no markings, bombed and sank her off Balikpapan in southern Borneo. 18 crew were killed and another 28 were wounded.
The B-26's co-pilot was Colonel Muharto of the Permesta rebel movement's AUREV insurgent air force but the aircraft, its ammunition and pilot were supplied by the CIA as part of an insurgency to destabilise President Sukarno's government. The pilot was William H. Beale, a former United States Army Air Forces lieutenant colonel then employed by a Taiwan-based CIA front organisation, Civil Air Transport.