JDS Oyashio

Oyashio (SS-511) was a submarine of the Japan Maritime Self-Defense Force, named after the Oyashio Current, a cold current that comes down through the Bering Strait.

For other ships with the same name, see Japanese ship Oyashio.
History
Japan
Name: JDS Oyashio
Builder: Kawasaki Heavy Industries, Kobe
Laid down: 25 December 1957
Launched: 25 May 1959
Commissioned: 30 June 1960
Decommissioned: 30 September 1976
Fate: Scrapped in March 1977
General characteristics
Type: Submarine
Displacement:
  • 1,139 long tons (1,157 t) surfaced
  • 1,420 long tons (1,443 t) submerged
Length: 78.8 m (258 ft 6 in)
Beam: 7 m (23 ft 0 in)
Draught: 4.6 m (15 ft 1 in)
Propulsion: 2 × Kawasaki V8V22/30MATL diesel-electric, 2,700 bhp (2,013 kW) surfaced, 5,960 shp (4,444 kW) submerged
Speed:
  • 19 knots (35 km/h; 22 mph) submerged
  • 13 knots (24 km/h; 15 mph) surfaced
Range: 10,000 nmi (19,000 km)
Complement: 65
Armament: 4× 533 mm (21 in) Bow torpedo tubes

Development

Following the loan of the Gato-class submarine USS Mingo as an underwater target in 1955, the Japan Maritime Self-Defense Force proposed the construction of three new classes of submarine, of 250, 500 and 1000 tons. In the end only the third of these classes was built, and the final weight grew to 1140 tons. Having had a vast submarine fleet before and during World War II, the Japanese had built no subs for over ten years, so JDS Oyashio was based on the wartime Imperial Japanese Navy I-201 with some US innovations. Laid down on 25 December 1957, and launched on 25 May 1959, Oyashio was commissioned on 30 June 1960.

Service history

On 1 August 1962 Oyashio was assigned to Subron 1, Kure district. In June–August 1963 she visited Pearl Harbor. Assigned to Subron 2, Submarine Flotilla 1 on 1 February 1965. Assigned to Submarine Flotilla 1 on 31 March 1975. Oyashio was finally decommissioned on 30 September 1976.

See also
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