North Korea Territorial Sea

Currently it seems like the territorial sea of North Korea is mapped as with the same width as South Korea, but I thought they have previously announced that their territorial sea would be 50 miles width instead?

Who announced what? North or South Korea? And where?


After further inspection, it seems like the 1977 announcement by the DPRK that declared a zone with a range of 50 nautical miles from its territorial water baseline was not exactly declaring a territorial water of such size but instead it’s declaring a “Military Boundary Zone”.

In such case how should the Military Boundary zone be mapped and with what tags to be applied?