South Korea have calculated a route from the North Korean ship weapons.

The South Korean intelligence services have set the final destination of the DPRK ship, aboard which, presumably, are weapons, parts of missiles and nuclear materials. " On this June 21, Reuters reports with reference to the media of South Korea.
Seoul found out that "We Can" should be in Myanmar, the power which belongs to authoritarian regime of General Than Shwe. Whether cargo "Kang Nam, Myanmar Military, the South Korean intelligence to know it was not possible.
United States and South Korea for several days to closely monitor the movement of North Korean vessel Kang Nam. Initially, it was assumed that the ship is sent to Singapore. That assumption came to the U.S. military, which followed the ship from the time it left North Korea on Wednesday.
June 19 at the interception of "Can We" went to the United States Navy destroyer John McCain. " It remains unknown how American sailors will "intercept" Can We "as in accordance with UN resolution 1874 inspection of North Korean ships could be made only with the permission of their masters.
Pyongyang, for its part, has threatened the world community that any illegal entry on board a North Korean vessel would be regarded as a declaration of war, followed by an immediate response.
The reason for the aggravation of relations with the West by North Korea as the second in the history of this country's nuclear tests carried out by Pyongyang in late May 2009. And Pyongyang also tested several missiles, small and medium-range. According to some reports, in early July, Pyongyang is preparing a new rocket launches.