This is the second article in a two-part series examining the Northern Limit Line, the de facto inter-Korean maritime border in the Yellow Sea. The first part can be read here.

Analysts have grown increasingly worried by angry rhetoric from North Korea’s supreme leader Kim Jong Un over the Northern Limit Line (NLL), the de facto inter-Korean maritime border since the end of the Korean War.

But while many have focused on the possibility of naval clashes and artillery shellings, there has so far been less attention on another growing risk — the suite of