Sōryū-class submarine
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The Sōryū-class submarines (16SS) are diesel-electric attack submarines. The first boat in the class entered service with the Japan Maritime Self-Defense Force in 2009. The design is an evolution of the Oyashio-class submarine, from which it can most easily be distinguished by its X-shaped stern combination diving planes and rudders. The Sōryūs have the largest displacement of any submarine used by post-war Japan.[2]
Soryu-class profile | |
Hakuryū (SS-503) visits Pearl Harbor, Feb 2013 | |
Class overview | |
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Name | Sōryū |
Builders | |
Operators | Japan Maritime Self-Defense Force |
Preceded by | Oyashio-class submarine |
Succeeded by | Taigei-class submarine |
Built | 2005 – 2019 |
In commission | 2009 – Present |
Planned | 12 |
Completed | 12 |
Active | 12 |
General characteristics | |
Type | Attack submarine |
Displacement |
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Length | 84.0 m (275 ft 7 in) |
Beam | 9.1 m (29 ft 10 in) |
Draught | 8.5 m (27 ft 11 in) |
Propulsion |
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Speed | |
Range | AIP endurance (est.): 6,100 nautical miles (11,300 km; 7,000 mi) at 6.5 knots (12.0 km/h; 7.5 mph)[1] |
Complement | 65 (9 officers, 56 enlisted) |
Sensors and processing systems |
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Electronic warfare & decoys |
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Armament |
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The Sōryū-class is Japan's first air-independent propulsion submarine class. From Sōryū to Shōryū are fitted with Kockums Naval Solutions Stirling engines license-built by Kawasaki Heavy Industries, allowing them to stay submerged for longer periods of time. The 11th submarine of the class, Ōryū, is the world's first lithium-ion battery submarine.[3] The cost of the sixth submarine (Kokuryū) was estimated at US$540 million.[4]
In 2023, the first of the replacements for the Sōryūs, the Taigei-class submarine,[5] entered service.[6]