evidence: The Courantyne River (/ˈkɜːrəntaɪn/ KUR-ən-tyne),[1] also known as Corentyne and Corantijn (Dutch: [ˌkoːrɑnˈtɛin] ), is a river in northern South America in Suriname and Guyana. It is the longest river in the country and creates the border between Suriname and the East Berbice-Corentyne region of Guyana. [...] Between the upper reaches of the Courantyne, the Upper Courantyne, the Coeroeni and the Koetari rivers lay the controversial Tigri Area claimed by both Suriname and Guyana. The Guyanese–Surinamese border is the Guyanese river bank (the west bank of the river), Suriname regarded the left bank of the Courantyne as a border, but Guyana disputes this and viewed the center of the river as a frontier, based on the Thalweg Doctrine. This conflict, which has been fueled since the colonial era, was solved in 2007 by a verdict by the Hague Arbitration Court, which settles the border between Guyana and Suriname on the left bank of the river, and the river water body belonging to Suriname. The tribunal that defined the maritime boundary between Suriname and Guyana in 2007 confirmed Surinamese sovereignty over the full width of the entire Courantyne River.[5][6] Suriname has control over all ship traffic from the mouth of the Courantyne.