Arctic Ocean gas reserves, and the Chukchi shelf forms the border between Russian and the United States as stated in the USSR–USA Maritime Boundary Agreement. The whole area is subject to international territorial claims. An underwater ridge, the Lomonosov Ridge, divides the deep sea North Polar Basin into two oceanic basins: the Eurasian Basin, which is between deep, and the Amerasian Basin (sometimes called the North American, or Hyperborean Basin), which is about deep. The bathymetry of the ocean bottom is marked by fault block ridges, abyssal plains, ocean deeps, and basins. The average depth of the Arctic Ocean is . The
Cape Nansen which is a line joining Cape Nansen with Straumnes, Iceland, the NW point of Iceland. Cape Nansen Cape Nansen () is a headland in the Greenland Sea, east Greenland, Sermersooq municipality. This cape is named after Fridtjof Nansen. Cape Nansen is an important geographical landmark. Cape Nansen is located to the northeast of the mouth of the Nansen Fjord in an indented area of the eastern Greenland coast where there is a succession of headlands with active glaciers in between. The cape lies 15 km to the east-northeast of the mighty Cape J.A.D. Jensen on Sokongen Island This headland has