The line of equidistance was drawn graphically on British Admiralty charts BA 4507 that uses a Mercator projection and a scale of 1:3.5 million at 22°30 N (The Hydrographer, 1992 and BA 943 that also uses a Mercator projection and a scale of 1.555 million at 6°45’ N (The Hydrographer, 1946). The line of equidistance measures about 760nm if Indonesia is awarded Pulau Ligitan and 670nm if the island is awarded to Malaysia. The median line passes through two narrow passages south of Mindanao. Only 38nm of sea separates the Philippine island called Tinina Balut at the southern tip of Mindanao from the Indonesia’s Pulau Marore and only 50nm separates Pulau Miangas from Cape San Agustin on Mindanao.