This is the first of a two-part series examining the Northern Limit Line, the de facto inter-Korean maritime border in the Yellow Sea. The second part will consider potential types of confrontation that could occur.

Tensions surrounding the inter-Korean maritime border have ramped up this year, with North Korea jamming GPS signals after threatening military action should ROK ships cross into its waters in the Yellow Sea.

The hostilities have renewed attention on the Northern Limit Line (NLL) that has long served as the de facto maritime border between the two Koreas, and NK Pro