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
HNoMS Fridtjof Nansen (F310) with two ultra-fast RHIBs as a replacement. In November 2009 she became involved in a fire-fight with suspected pirates after being attacked while inspecting a fishing vessel. In 2014, "Fridtjof Nansen" took part in the naval exercise RIMPAC 2014 in the Pacific Ocean. During the exercise, she used a Naval Strike Missile to sink the , a decommissioned U.S. Navy amphibious transport dock, as a target 55 nautical miles northwest of Hawaii on 10 July 2014. HNoMS Fridtjof Nansen (F310) HNoMS "Fridtjof Nansen" is a frigate of the Royal Norwegian Navy. Launched on 5 April 2006, she is the lead