Seems that when Kim Il Don ordered that "massive armada" (Really big ships and lots of them, really yuge) to go threaten that other Kim in North Korea, the task force left Singapore and immediately sailed south through the Sunda Strait. Go figure.
The Sunda Strait is that narrow gap near Jakarta at the bottom of the map. North Korea is at the top.
Maybe the plan is to circumnavigate the globe via the poles (passage will be easy, global warming and all that, eh ?