Beginning at the Namibian-South African boundary at the mouth of the Orange River, thence due west along the 30º South parallel to the meridian 20° West, thence due north along the 20º West meridian to the equator, thence due west along the equator to the meridian 30° West, thence due north along the 30º West meridian to a parallel 5° North, thence due west along the 5º North parallel to the meridian 40° West, thence due north along the 40º West meridian to the 36° North parallel, thence due east to the coast of the African continent at Cape Spartel.