From this point, it continues along the ordinary high tide until reaching the point with geographic coordinates 203,750 north and 382,350 east, which corresponds to the point of origin. Furthermore, a marine zone of 12 nautical miles is included, from Punta Islita to Punta El Roble, being delimited by the following coordinates: starting at point 203,750 north and 382,350 east, it continues in a straight line to point 204,000 north and 375,350 east, continues to point 181,800 north and 375,350 east, continues to point 181,800 north and 382,350 east, until reaching the starting point at geographic coordinates 203,750 north and 382,350 east.
The internal marine waters located between geographic coordinates 203,750 north and 382,350 east and geographic coordinates 204,000 north and 375,350 east, also form part of the marine protected area of the Camaronal National Wildlife Refuge.