The legal regime established by the United Nations Law of the Sea Convention for the delineation of the outer limits of the extended continental shelf combines both legal and scientific concepts, rendering its interpretation challenging to both legal practitioners with no scientific background, and marine scientists with no legal training. For this reason, the present Manual covers, to the extent possible, all relevant legal, scientific, logistical and procedural aspects of the delineation of the outer limits of the extended continental shelf in its nine modules.