All waters beyond areas of national jurisdiction in the area bounded by a line joining the following points along parallels of latitude and meridians of longitude: Beginning at the outer limit of waters under national jurisdiction at a point 6?? South, thence due west along the 6?? South parallel to the meridian 10?? West, thence due north along the 10?? West meridian to the equator, thence due west along the equator to the meridian 20?? West, thence due south along the 20?? West meridian to a parallel 50?? South, thence due east along the 50?? South parallel to the meridian 30?? East, thence due north along the 30?? East meridian to the coast of the African continent.