S. Korea to launch 1st 3,600-ton naval attack submarine

A 3,600-ton-class naval submarine, the first of the three Changbogo-III Batch-II class submarines, is seen at shipbuilder Hanwha Ocean's dockyard in Geoje, about 330 kilometers southeast of Seoul, on Oct. 21, 2025, a day before its launch ceremony, in this photo released by the Navy the next day. Named after iconic Joseon Dynasty (1392-1910) engineer Jang Yeong-sil, the 89-meter-long Batch-II submarine is part of the military's Changbogo-III or KSS-III program to acquire advanced diesel-electric attack submarines. (PHOTO NOT FOR SALE) (Yonhap)

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