Natural delimitation between the Pacific and South Atlantic oceans by the Scotia Arc
The natural delimitation between the Pacific and South Atlantic Oceans by the Scotia arc (in Spanish: Delimitación natural entre los océanos Pacífico y Atlántico Sur por el arco de las Antillas Australes) is a hydrographical concept developed in Chile in 1952 and defended internationally by Eduardo Saavedra Rojas in which it was postulated that the boundary between the southeast Pacific Ocean and the southwest Atlantic Ocean should not be the meridian of Cape Horn but rather follow the line of the Scotia Arc, an underwater mountain range which links the Tierra del Fuego archipelago with the Antarctic continent. == Origin == The idea was first proposed by the Chilean delegation at the IV conference of the International Hydrographic Bureau (later the International Hydrographic Organization), held in Monte Carlo in 1952, and was formally presented in 1954 to the International Association of Physical Oceanography, gathered at the 10th Assembly of the International Union of Geodesy and Geophysics in Rome.