 From the Northern point of Wrangel Island to Point Barrow — the Northern limit of Chuckchi Sea.From Point Barrow to Cape Land’s End on Prince Patrick Island — the Northern limit of Beaufort Sea, through the Northwest coast of Prince Patrick Island to Cape Leopold M’Clintock, thence to Cape Murray (Brook Island) and along the Northwest coast to the extreme Northerly point; to Cape Mackay (Borden Island); through the Northwesterly coast of Borden Island to Cape Malloch, to Cape Isachsen (Ellef Ringnes Island); to the Northwest point of Meighen Island to Cape Stallworthy (Axel Heiberg Island) to Cape Colgate the extreme West point of Ellesmere Island; through the North shore of Ellesmere Island to Cape Columbia thence a line to Cape Morris Jesup (Greenland).Note that these definitions exclude any marginal waterbodies that are separately defined by the IHO (such as the Kara Sea and East Siberian Sea), though these are usually considered to be part of the Arctic Ocean.The CIA defines the limits of the Arctic Ocean differently, as depicted in the map comparing its definition to the IHO's definition.