Update on March 31 at 8:30 a.m. KST: New high-resolution imagery suggests the ship was moved outside at the Nampho Dockyard between March 27 and 28.

North Korea is preparing to move one of its large new warships for the first time since construction began last summer, satellite imagery reveals, a sign of the project’s advanced development as Pyongyang seeks to challenge the status quo on the seas around the Korean Peninsula.

According to experts at the James Martin Center for Nonproliferation Studies of the Middlebury Institute, a floating drydock appeared this week in front of the