The maritime boundary between Indonesia and the Philippines follows a generally east-west directional orientation and spans roughly 627 nautical miles. The boundary is composed of seven boundary segments that connect eight turning points and originates at a point lying just beyond the undelimited waters of Malaysia and Indonesia, a disputed area of continental shelf in the Celebes Sea known as Ambalat. It then extends in an easterly direction to a point in the Philippine Sea where the maritime rights of Palau come into play. The boundary was defined in a single agreement signed in 2014, twenty years after the first negotiations between the governments of Indonesia and the Philippines took place. The delimitation was based on the principle of equidistance.


Map showing the maritime boundary between Indonesia and Philippines


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