↑ A single meridian is excluded because no lands can be south of it. Two partial meridians are possible, one extending north from a point west of the Azores and another extending south from a point south of the Cape Verde Islands, the two being connected by a north-northwest south-southeast line segment. Another possibility is a rhumb line west and south of the islands extending north-northwest and south-southeast. All rhumb lines reach both poles by spiraling into them.
↑ Verzijl, Jan Hendrik Willem (1979). International Law in Historical Perspective. Martinus Nijhoff. pp. 230–234, 237. ISBN9789028601581. Unknown parameter |coauthors= ignored (|author= suggested) (help). Online, Google Books entry
