South Korean shipbuilder Daewoo Shipbuilding & Marine Engineering (DSME) handed over Chang Bogo (Type 209/1200)-class submarine Na Dae Yong to the Republic of Korea Navy (RoKN) on 10 June after completing a two-year-long upgrade of the 1,200-tonne boat.
The Defence Acquisition Programme Administration (DAPA) in Seoul announced in a statement on 10 June that the 55.9 m-long and 6.2 m-wide submarine, which first entered service in November 2000, has been retrofitted with a new combat management system, an improved target detection and tracking capability, and a towed-array sonar.
The upgraded KSS-I diesel-electric attack submarine was handed over in a ceremony held at the DSME's Okpo shipyard on Geoje Island. DAPA said that another retrofitted boat of the class, Choi Moo Sun (SS 063), had been handed over to the service in February.
The agency said it expects the successful local production of the integrated combat system on the boats to "greatly contribute" to improving South Korea's defence technology capabilities and the operational capability of the country's military.
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