The determination of outstanding maritime boundaries is one of the most strategic challenges for concerned States, and has wide-ranging geopolitical, economic and environmental implications. Settlement of disputes over maritime zones involves the application of complex rules of public international law, such as those of the 1982 United Nations Convention on the Law of the Sea (UNCLOS). Conflicting claims of sovereignty over natural resources of the sea, the seabed and subsoil are increasingly are increasingly driving recourse to judicial or arbitral settlement of maritime disputes, as well as the emergence of new concepts of joint development and management of maritime zones and their resources.

The Law of the Sea Law Advisory Group assists States in the process of delimitation of their maritime boundaries. It also advises private companies on the challenges and risks related to their activities in undelimited maritime areas.

Technical expertise

Persian Gulf
Abstract of map annexed to Limits in the Seas No. 94, Continental Shelf Boundaries: The Persian Gulf (US Department of State, Bureau of Intelligence and Research, Office of the Geographer, 1981)

The process of delimitation of international maritime boundaries relies to a large extent on adequate depiction of maritime zones on maps. Technological advances and tools are to be used to draw boundary lines, reduce risks of errors and thus ensure accurate and stable agreed boundaries. This is why the Law of the Sea Law Advisory Group partners with world-class technical experts in marine cartography and hydrography.

Our Range of Capabilities

Legal Support


Policy Advice