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