South Korea launched a new 3,600-ton submarine on Wednesday featuring improved stealth capabilities and the ability to carry more ballistic missiles, marking a major upgrade to the country’s ability to carry out strikes against North Korea.

The navy and the Defense Acquisition Program Administration (DAPA) said in a joint press release that it held a launching ceremony for the ROKS Jang Yeong-sil (SS-087) at Hanwha Ocean’s shipyard in Geoje.