Map: The Falkland Islands' Disputed Seas

The Falkland Islands, a South Atlantic territory disputed between the U.K. and Argentina, held a status referendum this week in which 99.8% of voters defied Argentina by choosing to remain British. But it's not just about the islands - also at stake are legal rights to the sea for hundreds of miles around.

Zones of maritime jurisdiction around the Falkland Islands, highlighting area disputed between the U.K and Argentina. Map by Evan Centanni (country coastlines from the Natural Earth dataset). All rights reserved.

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The Disputed Seas of the Falkland Islands
The Falkland Islands are administered by the U.K. as an overseas territory, but are also claimed based on historical arguments by Argentina, which calls them "las Islas Malvinas". Both countries have signed and ratified the United Nations Convention on the Law of the Sea (UNCLOS), which defines ownership and legal rights for the waters surrounding coastal countries. According to the UNCLOS, each country is entitled to three basic zones of control in its surrounding seas: