Japan Commissions JS Shōryū, the 10th Sōryū-class Submarine

IndraStra Global

Japan Commissions JS Shōryū, the 10th Sōryū-class Submarine

By IndraStra Global News Team

Image Attribute: The launch of S Shōryū (しょうりゅう, Soaring Dragon / Pennant no: SS-510) at Kawasaki Heavy Industries (KHI) shipyard  in Kobe on March 18, 2019,/ Source: Sankei News Screengrab.

Image Attribute: The launch of JS Shōryū (しょうりゅう, Soaring Dragon / Pennant no: SS-510) at Kawasaki Heavy Industries (KHI) shipyard in Kobe on March 18, 2019,/ Source: Sankei News Screengrab.

On March 18, 2019, the Japan Maritime Self Defense Force (JMSDF) commissioned its tenth diesel-electric Sōryū-class attack submarine - JS Shōryū (しょうりゅう, Soaring Dragon / Pennant no: SS-510) in Kobe. The first boat in the class entered service in 2009. 

The submarine of this class is powered by two Kawasaki 12V 25/25 diesel engines and four Kawasaki Kockums V4-275R Stirling air-independent propulsion (AIP) engines (designed by Kockums Naval Solutions, license-built by Kawasaki Heavy Industries) which can propel it to a maximum speed of 20 knots (submerged, 37 km/h; 23 mph) and 12 knots (surfaced, 24 km/h; 15 mph). AIP endurance (est.): 6100 nautical miles (11297.2 km; 7060.75 miles) at 6.5 knots (12 km/h; 7.48 mp/h)

The design of the submarine of this class is an evolution of the Oyashio-class submarine, from which it can most easily be distinguished by its X-shaped stern - a combination of diving planes and rudders.

Japan has so far launched 11 of the possible 13 submarines in the class. The 11th submarine, JS Ōryū (おうりゅう, Phoenix Dragon / Pennant no: SS-511) was launched in October 2018. The boat is being built by Mitsubishi Heavy Industries (MHI) and is the first JMSDF submarine to be fitted with lithium-ion batteries in place of lead-acid batteries installed on the previous ten Sōryū-class submarines.


Project Specifications

Project No: S131

Building No: 8125

Date of Keel Laying: January 28, 2015

Date of Launch: November 6, 2017

Date of Commissioning:  March 18, 2019

Homeport: Kure

Technical Specifications

Length overall: 84.0 meters (m) / (275 ft 7 in)

Beam/Breadth: 9.1 m / (29 ft 10 in)

Draught/Depth: 8.5 m / (27 ft 11 in)

Displacement: 2,950 tonnes (submerged displacement: 4,100 tonnes)

Engines:
  • 1-shaft 2× Kawasaki 12V 25/25 SB-type diesel engines diesel-electric
  • 4× Kawasaki Kockums V4-275R Stirling engines
Power:
  • 3,900 hp (2,900 kW) surfaced
  • 8,000 hp (6,000 kW) submerged
Speed:
  • Surfaced: 12 knots (24 km/h; 15 mph)
  • Submerged: 20 knots (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)

Complement/Crew: 65 (9 officers, 56 enlisted)

Sensors - Radars/Sonars:
  • 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 Suite:
  • ZLR-3-6 ESM equipment
  • 2× 3-inch underwater countermeasure launcher tubes for the launching of Acoustic Device Countermeasures (ADCs)
Weapon Systems/Armaments:
  • 6 × HU-606 21 in (533 mm) torpedo tubes for Type 89 torpedo and Harpoon missiles.
  • Mines