Sōryū-class submarine

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Hakuryu-130412-N-LS794-166.jpg
Hakuryu (SS503) visits Guam in 2013
Class overview
Name: Sōryū
Builders: Mitsubishi Heavy Industries
Kawasaki Shipbuilding Corporation
Operators:  Japan Maritime Self-Defense Force
Preceded by: Oyashio class
Built: 2005–
In commission: 2009–
Building: 5
Planned: 10
Completed: 5
Active: 5
General characteristics
Type: Submarine
Displacement: Surfaced: 2,900 tonnes (2,854 long tons)
Submerged: 4,200 t (4,134 long tons)
Length: 84.0 m (275 ftin)
Beam: 9.1 m (29 ft 10 in)
Draught: 8.5 m (27 ft 11 in)
Depth: 500m[1]
Propulsion: 1-shaft 2× Kawasaki 12V 25/25 SB-type diesel engines diesel-electric
4× Kawasaki Kockums V4-275R Stirling engines
3,900 hp (2,900 kW) surfaced
8,000 hp (6,000 kW) submerged
Speed: Surfaced: 13 kn (24 km/h; 15 mph)
Submerged: 20 kn (37 km/h; 23 mph)
Range: AIP endurance (est.): 6100 nautical miles (11297.2 km; 7060.75 miles) at 6.5 knots (12 km/h; 7.48 mp/h)[2]
Complement: 65 (9 officers, 56 enlisted)
Sensors and
processing systems:
ZPS-6F surface/low-level air search radar
Hughes/Oki ZQQ-7 Sonar suite: 1× bow-array, 4× LF flank arrays and 1× Towed array sonar
Electronic warfare
& decoys:
ZLR-3-6 ESM equipment
2× 3-inch underwater countermeasure launcher tubes for launching of Acoustic Device Countermeasures (ADCs)
Armament: 6×HU-606 21 in (533 mm) torpedo tubes with 30 reloads for:
1.) Type 89 torpedoes
2.) UGM-84 Harpoon
Mines

The Sōryū-class submarines (16SS) are diesel-electric submarines that 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 tail planes. The Sōryūs have the largest displacement of any submarine used by post war Japan.

The class are fitted with air-independent propulsion based on Kockums stirling engines license-built by Kawasaki Heavy Industries, allowing them to stay submerged for longer periods of time.[3]

The cost of the sixth submarine ("Kokuryu") was estimated at 540 million USD.[4]

Naming convention[edit]

Japanese submarines since World War II were named after ocean currents. The JMSDF changed its naming convention with the Sōryū[5] and submarines will now be named after mythological creatures. Sōryū (そうりゅう) means blue (or green) dragon in Japanese and is named after the World War II carrier sunk during the Battle of Midway.

Exports[edit]

Japan may offer Sōryū-class submarines to Australia to replace the Royal Australian Navy's Collins class submarines as part of the Collins-class submarine replacement project.[6][7] On 9 April 2014 Australian Defence Minister David Johnston while discussing Australia's future submarine options described the Sōryū-class as 'extremely impressive'.[8] It was reported on 7 September 2014 that it is likely that an announcement would be made before the end of that year, for the purchase of up to 10 submarines for more than $20 billion.[9]

Hakuryu (SS-503) visits Pearl Harbor, Feb 2013
JS Zuiryu (SS-505) under construction


Boats[edit]

Project no. Building no. Pennant no. Name/Namesake Laid down Launched Commissioned Home port
S131 8116 SS-501 Sōryū (そうりゅう?) / Blue Dragon 31 March 2005 5 December 2007 30 March 2009 Kure
S131[10] 8117 SS-502 Unryū (うんりゅう?) / Cloud Dragon 31 March 2006 15 October 2008 25 March 2010[11] Kure
8118 SS-503 Hakuryū (はくりゅう?) / White Dragon 6 February 2007 16 October 2009 14 March 2011 Kure
8119 SS-504 Kenryū (けんりゅう?) / Sword Dragon, Stegosauria 31 March 2008 15 November 2010 16 March 2012 Kure
8120 SS-505 Zuiryū (ずいりゅう?) / Auspicious Dragon 16 March 2009 20 October 2011 6 March 2013 Yokosuka
8121 SS-506 Kokuryū (こくりゅう?) / Black Dragon 21 January 2011 31 October 2013 (March 2015)  ?
S131[10][12] 8122 SS-507  ?  (March 2012) (2014) (March 2016)  ?
S131[10][12][13] 8123 SS-508  ? (2013) (2015) (March 2017)  ?
S131[14] 8124 SS-509  ?   ?  ?  ?  ?
S131[15] 8125 SS-510  ?   ?  ?  ?  ?


References[edit]

External links[edit]