Dosan Ahn Changho-class submarine

The Dosan Ahn Changho class, also known as KSS-III Batch-I, is the first group of South Korean 3,000-tonne diesel-electric submarines, designed to fire submarine-launched ballistic missiles from vertical launch cells behind the sail. Daewoo Shipbuilding and Marine Engineering, now Hanwha Ocean, designed the class with Hyundai Heavy Industries; the defence ministry contracted DSME in 2012 to build the first two boats and Hyundai the third. The lead boat was launched at the Okpo yard on 14 September 2018. The class is named for the Korean independence activist Ahn Chang Ho, whose art name was Dosan. It carries a domestically designed fuel-cell air-independent propulsion module, and about 76 percent of its components were sourced in South Korea, the largest submarine the country had built at that time.