Data from the South Korean navy suggest that North Korean vessels have trespassed into South Korean waters over 50 times since the March 2010 sinking of the Cheonan corvette. The invasions were consistently 7-9 times each month between May and October. Over a 5 year period, North Korea has trespassed over 200 times over the Northern Limit Line, the line separating waters between North and South Korea. The North has never accepted the location of the NLL, and insists it be moved further south.
Source: Asian News Network
