Engineering:Uzushio-class submarine

Uzushio (SS-566)
Class overview
Name:	Uzushio
Builders:	Kawasaki Shipbuilding Corporation, Mitsubishi Heavy Industries
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

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.

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.	Name	Laid down	Launched	Commissioned	Note
S118	8081	SS-566	Uzushio (うずしお)	25 September 1968	11 March 1970	21 January 1971	Decommissioned 24 March 1987, scrapped
	8082	SS-567	Makishio (まきしお)	21 June 1969	27 January 1971	2 February 1972	Decommissioned 11 March 1988, scrapped
S119	8083	SS-568/ ATSS-8001	Isoshio (いそしお)	9 July 1970	18 March 1972	25 November 1972	Converted to auxiliary training submarine (ATSS-8001) on 24 March 1989, decommissioned 25 March 1992, sunk as target off Izu Ōshima August 1994
	8084	SS-569/ ATSS-8002	Narushio (なるしお)	8 May 1971	22 November 1972	28 September 1973	Converted to auxiliary training submarine (ATSS-8002) on 8 June 1990, decommissioned 15 March 1993, scrapped
	8085	SS-570/ ATSS-8003	Kuroshio (くろしお)	5 July 1972	22 February 1974	27 November 1974	Converted to auxiliary training submarine (ATSS-8003) on 20 March 1991, decommissioned 1 March 1994, scrapped
S119A	8086	SS-571/ ATSS-8004	Takashio (たかしお)	6 July 1973	30 June 1975	30 January 1976	Converted to auxiliary training submarine (ATSS-8004) on 6 June 1992, decommissioned 26 July 1995, scrapped
	8087	SS-572/ ATSS-8005	Yaeshio (やえしお)	14 April 1975	19 May 1977	7 March 1978	Converted to auxiliary training submarine (ATSS-8005) on 14 August 1994, decommissioned 1 August 1996, scrapped
	1 submarine						Canceled because of the 1973 oil crisis, naval budget was used for the DE Chikugo-class and others.