AHS Centaur
Australian Hospital Ship Centaur was a hospital ship which was attacked and sunk by a Japanese submarine off the coast of Queensland, Australia, on 14 May 1943. Of the 332 medical personnel and civilian crew aboard, 268 died, including 63 of the 65 army personnel.
The Scottish-built vessel was launched in 1924 as a combination passenger liner and refrigerated cargo ship and operated a trade route between Western Australia and Singapore via the Dutch East Indies, carrying passengers, cargo, and livestock. At the start of World War II, Centaur was placed under British Admiralty control, but after being fitted with defensive equipment, was allowed to continue normal operations. In November 1941, the ship rescued German survivors of the engagement between Kormoran and HMAS Sydney. Centaur was relocated to Australia's east coast in October 1942, and used to transport materiel to New Guinea.
In January 1943, Centaur was handed over to the Australian military for conversion to a hospital ship, as her small size made her suitable for operating in Maritime Southeast Asia. The refit was completed in March, and the ship undertook a trial voyage: transporting wounded from Townsville to Brisbane, then from Port Moresby to Brisbane. After replenishing in Sydney, Centaur embarked the 2/12th Field Ambulance for transport to New Guinea, and sailed on 12 May. Before dawn on 14 May 1943, during her second voyage, Centaur was torpedoed and sunk by a Japanese submarine off Moreton Island, Queensland. The majority of the 332 aboard died in the attack; the 64 survivors were discovered 36 hours later. The incident resulted in public outrage as attacking a hospital ship is considered a war crime under the 1907 Hague Convention. Protests were made by the Australian and British governments to Japan and efforts were made to discover the people responsible so they could be tried at a war crimes tribunal. In the 1970s the probable identity of the attacking submarine, I-177, became public.
The reason for the attack is unknown; there are theories that Centaur was in breach of the international conventions that should have protected her, that I-177s commander was unaware that Centaur was a hospital ship, or that the submarine commander, Hajime Nakagawa, knowingly attacked a protected vessel. The wreck of Centaur was found on 20 December 2009; a claimed discovery in 1995 has been proven to be a different shipwreck.
Design and construction
Original design
In early 1923, the Ocean Steamship Company decided that a new vessel would be required to replace the ageing Charon on the Western Australia to Singapore trade route. The vessel had to be capable of simultaneously transporting passengers, cargo, and livestock. She also had to be capable of resting on mud flats out of the water as the tidal variance in ports at the northern end of Western Australia was as great as.Scotts Shipbuilding and Engineering Company in Greenock was chosen to build Centaur. The keel was laid on 16 November 1923, and the ship was ready for collection by 29 August 1924. Constructed at a cost of £146,750 sterling, Centaur was designed to carry 72 passengers and 450 cattle. Cargo was carried in four holds; the two decks within the hull were primarily for livestock, and could also be used as extra cargo space. The hull of the ship was a 'turret deck' design; decks below the waterline were wider than those above water, and a flat, reinforced hull allowed the ship to rest on the bottom. Centaur was among the first civilian vessels to be equipped with a diesel engine. One of the most visible characteristics was the smokestack, the extreme size was more a concession to tradition than of practical advantage on a diesel-powered vessel. Her engine was 6-cylinder 4-stroke, single cycle single action diesel engine. It had cylinders of 24 inches diameter by 51 inches stroke. The engine was built by Burmeister & Wain, Copenhagen, Denmark. One of her holds was fitted with refrigeration equipment. The refrigerant was brine and the insulation was cork. The refrigerated hold had a capacity of.
In December 1939, Centaur underwent a minor refit in Hong Kong, with a supercharger and a new propeller fitted to the engine. The supercharger broke down in April 1942, and could not be repaired because of equipment shortages and restricted dockyard access caused by World War II.
Hospital ship refit
At the beginning of 1943, Centaur was placed at the disposal of the Australian Department of Defence for conversion to a hospital ship. The conversion was performed by United Ship Services in Melbourne, Australia, and was initially estimated to cost AU£20,000.The cost increased to almost AU£55,000, for a variety of reasons. It was originally intended for the ship to travel between ports in New Guinea and Townsville, Queensland, Australia. Increasing casualty numbers in the New Guinea campaign meant that the hospitals in Queensland would quickly become unable to deal with the quantity of the casualties and the nature of their injuries, so a longer voyage to Sydney was required. The Army demanded that more facilities and conversions be added to the original plans such as expanded bathing and washing facilities, hot water made available to all parts of the ship through installation of a calorifier, the rerouting of all steam pipes away from patient areas, and ventilation arrangements suitable for tropical conditions. The unions representing the ship's crew requested improved living and dining conditions, including new sinks in the food preparation areas and the replacement of flooring in the quarters and mess rooms.
When AHS Centaur was relaunched on 12 March 1943, she was equipped with an operating theatre, dispensary, two wards, and a dental surgery, along with quarters for seventy five crew and sixty five permanent Army medical staff. To maintain the ship's mean draught of, 900 tons of ironstone were distributed through the cargo holds as ballast. AHS Centaur was capable of voyages of 18 days before resupply and could carry just over 250 bedridden patients.
Operational history
1924 to 1938
Centaur was allocated the United Kingdom Official Number 147275 and the Code Letters KHHC. Her port of registry was Liverpool. When Centaur entered service at the end of 1924, the Fremantle–Java– Singapore trade route was being serviced by two other Blue Funnel Line vessels; Gorgon and Charon. Centaurs route ran from Fremantle up the Western Australian coast calling at Geraldton, Carnarvon, Onslow, Point Samson, Port Hedland, Broome, and Derby then to the Bali Strait, Surabaya, Semarang, Batavia, and Singapore. Centaur operated as a cross between a tramp steamer and a freight liner; she travelled a set route, but stops at ports along the route varied between journeys. From 1928 until sometime in the 1930s, Centaur remained alone on her route, but the increase in trade along this route prompted Blue Funnel Line to reassign Gorgon and assign the new Charon to work alongside Centaur.Following the change in Code Letters in 1934, Centaur was allocated the Code Letters GMQP. A highlight of Centaur's pre-war career was the rescue of the 385 ton Japanese whale-chaser Kyo Maru II in November 1938. Kyo Maru II had developed boiler problems while returning from the Antarctic and was drifting towards the Houtman Abrolhos Archipelago, where she was in danger of being wrecked by the reefs in the area. Centaur responded to the distress signal and towed Kyo Maru II to Geraldton.
1939 to 1942
As a vessel of the British Merchant Navy, Centaur was affected by the British Parliament's 1939 outline of how the Merchant Navy would respond to the declaration of war, primarily submission to the Admiralty in all matters excluding the crewing and management of vessels. Following the outbreak of World War II on 3 September 1939, Centaur was equipped with a stern-mounted Mark IX naval gun and two.303 Vickers machine guns located on the bridge wings for protection against Axis warships and aircraft. She was also fitted with port and starboard paravanes and degaussing equipment for protection against naval mines. The weapons were removed during the hospital ship refit, although the anti-mine countermeasures remained. Centaur initially remained in service on her original trade route.On 26 November 1941, a damaged lifeboat carrying 62 Kriegsmarine sailors and officers was spotted by an aircraft looking for the missing Australian cruiser ; the aircraft directed Centaur to the lifeboat. Upon encountering the lifeboat, food was lowered to its occupants, and one person was allowed on board to explain the situation. Initially posing as a Norwegian merchant navy officer, the man quickly revealed that he was the first officer of the and that the lifeboat contained German survivors from Kormorans battle with HMAS Sydney seven days earlier, including Captain Theodor Detmers.
Unwilling to leave the shipwrecked men at sea, but afraid of having his ship captured by the Germans, Centaurs master decided to take the lifeboat in tow, after allowing nine wounded men aboard. During the tow towards Carnarvon, Western Australia, the lifeboat was swamped and partially sunk by rough seas, so two of Centaurs lifeboats were lowered to carry the Germans. On arrival in Carnarvon, the Germans were relocated to the number one cargo hold, where they were joined by another hundred Kormoran survivors collected by other ships, plus forty Australian Army guards, which were then transported by Centaur to Fremantle.
Following the Japanese attack on Pearl Harbor and the beginning of the Malayan Campaign on 7 December 1941, Centaurs run was curtailed to Broome, Western Australia. On 6 October 1942, Centaur was ordered to sail to Queensland, where she began runs between the east coast of Australia and New Guinea, carrying materiel.