Uzushio-class submarine

The Uzushio-class submarine (Whirlpools) was a series of submarines in service with Japanese Maritime Self Defense Force which was the first generation of the teardrop type submarine that valued the underwater performance against that of the conventional-hull type Asashio class. Seven from 1967 fiscal year were built with the third defense plan. The eighth 49 fiscal year warship was discontinued and construction was discontinued because of the construction expense and sudden rise oil crisis though eight were planned at first. Many were converted to training submarines (ATSS) towards the end of their lives.

Uzushio (SS-566)
Class overview
Name: Uzushio
Builders:
Operators:  Japan Maritime Self-Defense Force
Preceded by: Asashio class
Succeeded by: Yūshio class
Built: 1968–1978
In commission: 1971–1996
Planned: 8
Completed: 7
Cancelled: 1
Retired: 7
General characteristics
Type: Submarine
Displacement: 1,850 tonne (1,821 ton) standard, 3,600 tonne (3,543 ton) submerged
Length: 72.0 m (236.2 ft)
Beam: 9.9 m (32 ft)
Draught: 7.5 m (25 ft)
Depth: 10.1 m (33 ft)
Propulsion:
  • 1-shaft diesel-electric
  • 2 × Kawasaki-MAN V8V24/30AMTL diesel
  • 3,400 bhp (2,500 kW) (surfaced)
  • 7,200 shp (5,400 kW) (submerged)
Speed:
  • 12 knots (22 km/h) surfaced
  • 20 knots (37 km/h) submerged
Range: 5,500 nautical miles (10,200 km; 6,300 mi) at 12 knots
Complement:
  • SS-566 to SS-570
  • 80
  • SS-571 and SS-572
  • 75
Sensors and
processing systems:
  • ZPS-4 surface search radar
  • ZQQ-1 (SS-566, 567), ZQQ-2 (SS-568, 569, 570), ZQQ-3 (SS-571, 572) passive sonar
  • SQS-4 (SS-566, 567, 568, 569, 570), SQS-36J (SS-571, 572) active sonar
Electronic warfare
& decoys:
ZLA-5 ESM
Armament:
  • 6 × 533 mm (21 in) Bow torpedo tubes
  • 12 × type 72 torpedo
  • 6–8 × Mk 37 torpedo

General characteristics

The Uzushio-class submarine adopted the teardrop hull type for the first time in the Maritime Self-Defense Force. When the Asashio class was built, the adoption of the teardrop type had been examined. However, the Maritime Self-Defense Force at that time selected the conventional model that valued safety from the operation results. It was moving to the warship type that valued the underwater performance, and the examination that used the model in 1960 fiscal year was advanced, and necessary data was obtained also with TRDI in the age.

When designing, the location etc. are original though it refers to the Barbel-class submarine of United States Navy of not a complete copy but the inner shell structure and sail plane and torpedo tube.

Boats

Project no.Building no.Pennant no.NameLaid downLaunchedCommissionedNote
S1188081SS-566Uzushio (うずしお)25 September 196811 March 197021 January 1971Decommissioned 24 March 1987, scrapped
8082SS-567Makishio (まきしお)21 June 196927 January 19712 February 1972Decommissioned 11 March 1988, scrapped
S1198083SS-568/
ATSS-8001
Isoshio (いそしお)9 July 197018 March 197225 November 1972Converted to auxiliary training submarine (ATSS-8001) on 24 March 1989, decommissioned 25 March 1992, sunk as target off Izu Ōshima August 1994
8084SS-569/
ATSS-8002
Narushio (なるしお)8 May 197122 November 197228 September 1973Converted to auxiliary training submarine (ATSS-8002) on 8 June 1990, decommissioned 15 March 1993, scrapped
8085SS-570/
ATSS-8003
Kuroshio (くろしお)5 July 197222 February 197427 November 1974Converted to auxiliary training submarine (ATSS-8003) on 20 March 1991, decommissioned 1 March 1994, scrapped
S119A8086SS-571/
ATSS-8004
Takashio (たかしお)6 July 197330 June 197530 January 1976Converted to auxiliary training submarine (ATSS-8004) on 6 June 1992, decommissioned 26 July 1995, scrapped
8087SS-572/
ATSS-8005
Yaeshio (やえしお)14 April 197519 May 19777 March 1978Converted to auxiliary training submarine (ATSS-8005) on 14 August 1994, decommissioned 1 August 1996, scrapped
1 submarineCanceled because of the 1973 oil crisis, naval budget was used for the DE Chikugo-class and others.


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