North Korea appears to have resumed work on a warship that has been under development for the last decade, according to NK Pro analysis of satellite imagery, following the long-awaited deployment of its sister ship in August.

The relocation of the roughly 250-foot (77 meter) vessel to a drydock in the northeast city of Rason may be to equip new weapons systems in preparation for its entering service, one expert said, as leader Kim Jong Un pushes to upgrade his naval fleet.

The ship, referred to by experts as a Tuman-class corvette, was moved to the