evidence: 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: [...] The territorial sea is an area stretching up to 12 nautical miles out from the edge of the land or internal waters, which is considered sovereign territory of the state (i.e. an actual part of the country), though the "innocent passage" rule requires that foreign ships still be allowed to sail there without permission. Both the U.K. and Argentina claim a 12 nautical mile territorial sea surrounding the Falkland Islands. The two countries' claims are slightly different because they're drawn from the edges of the differing internal waters claims. The U.K. claim is shown on the map above (the small circle at the bottom is the territorial sea around Beauchene Island).