It's turned around, and is going back the way it came.
Why the ship turned around is a good question: for which there doesn't seem to be an answer. Presumably the Kang Nam's captain knows: but he hasn't shared that information, of course.
As for what I think this means: I think it means that the Kang Nam turned around, and that there's not enough information to allow reasonable speculation.
We'll just have to wait and see what happens next.
- "North Korea's Still There, Still a 'Serious Concern' "
(June 24, 2009)
- "USS John McCain Positioning for Intercept of North Korean Ship: More Radioactive Kimchi for Syria?"
(June 19, 2009)
- "Source: North Korean ship now going the other way"
The Associated Press (June 30, 2009)