The Japan Maritime Self-Defense Force (JMSDF) commissioned its ninth Soryu-class diesel-electric attack submarine (SSK) in a ceremony held on 12 March in Hyogo Prefecture in central Japan.
Named JS Seiryu (with pennant number SS 509), the 84-m-long boat was inducted into the JMSDF's Submarine Flotilla 2, based in Yokosuka, shortly after being handed over by shipbuilder Mitsubishi Heavy Industries (MHI) at its facility in Kobe, the service said in a statement. Seiryu , which was launched in October 2016, is the fifth submarine of the class built by MHI.
The 10th of the class, Shoryu (with pennant number SS 510), was launched in November 2017 by Kawasaki Heavy Industries (KHI), which has built four more boats of the class, and is expected to be commissioned March 2019. The JMSDF plans to operate a total of 12 such boats by March 2021. Funding for the 12th submarine was approved under Japan’s budget for fiscal year 2016 (FY 2016).
According to Jane's Fighting Ships, the Soryu class has a beam of 9.1 m, a hull draught of 8.4 m, and a displacement of 2,947 tonnes when surfaced and 4,100 tonnes when submerged. Powered by two Kawasaki 12V 25/25 diesel engines and four Kawasaki Kockums V4-275R Stirling air-independent propulsion (AIP) engines, each of the platforms has a top speed of 20 kt when submerged and12 kt when surfaced.
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