Japanese aircraft carrier Un'yō

Un'yō (雲鷹, Cloud Hawk) was a Taiyō-class escort carrier originally built as Yawata Maru (八幡丸), one of three Nitta Maru-class cargo liners built in Japan during the late 1930s. She was transferred to the Imperial Japanese Navy (IJN) during the Pacific War, renamed, and was converted into an escort carrier in 1942. The ship spent most of her service ferrying aircraft, cargo and passengers to various bases in the Pacific. Un'yō was badly damaged by an American submarine in early 1944. After repairs were completed in June, the ship resumed transporting aircraft and cargo. During a return voyage from Singapore in September, she was sunk by the submarine USS Barb.

For other ships with the same name, see Japanese ship Un'yō.

Un'yō in military service in 1943
History
Empire of Japan
NameYawata Maru
Operator Nippon Yusen Kaisha
BuilderMitsubishi Shipbuilding & Engineering Co., Nagasaki, Japan
Yard number751
Laid down14 December 1938
Launched31 October 1939
Completed31 July 1940
In service1940
FateTransferred to the Imperial Japanese Navy, 1941
Empire of Japan
Commissioned31 May 1942
Out of service17 September 1944
RenamedUn'yō, 31 August 1942
FateSunk by the submarine USS Barb, 17 September 1944
General characteristics (as converted)
Class and typeTaiyō-class escort carrier
Displacement
  • 18,116 t (17,830 long tons) (standard)
  • 20,321 t (20,000 long tons) (normal)
Length180.2 m (591 ft 4 in) (o/a)
Beam22.5 m (73 ft 10 in)
Draft7.7 m (25 ft 5 in)
Installed power
  • 25,200 shp (18,800 kW)
  • 4 × water-tube boilers
Propulsion
  • 2 × shafts
  • 2 × Kampon geared steam turbines
Speed21 knots (39 km/h; 24 mph)
Range6,500 or 8,500 nmi (12,000 or 15,700 km; 7,500 or 9,800 mi) at 18 knots (33 km/h; 21 mph)
Complement850
Armament
Aircraft carried30
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