Interesting thing that popped into my mind...
The NK's have a few decent subs in their order of battle...
Some fairly quiet diesel boats of Russian design (Kilo class I believe)...But they are trackable, and our best subs are like holes in the water, nearly impossible to track...
I bet the reason why we may not have already jumped on the ship is that we may not, or don't want to tip our hat that we have the means to take care of the ship, and any NK shadow it may have covering it, that may have a problem with us dealing with this situation...
Either way, there may be a couple of BOOMs when all is said and done...
Just something to think about...
If a NK ship had a work accident at sea, that would be too bad. Something on board must have blown up. Just something to think about.