On Tuesday, July 23, North Korean state media reported that leader Kim Jong Un has inspected a new submarine that had been under construction for some years now. As usual, the trip was left undated.

Three images released by the Korean Central News Agency showcased the new submarine, which was immediately striking for its size. This submarine appears to be larger than any other known undersea vessel in the Korean People’s Navy’s (KPN) inventory.

In fact, the vessel is almost certainly the successor ballistic missile submarine (SSB) to the KPN’s lone Gorae-class SSB