June 25, 2019 South Korea’s first KSS-3 submarine undergoes sea trials Written by Baird Maritime on June 25, 2019. Posted in Submersibles (Naval). Daewoo Shipbuilding and Marine Engineering (DSME) has begun conducting sea trials of the future ROKS Dosan Ahn Changho, the first KSS-3 submarine destined for .. Read More