Territoriality
Since 1925, Canada has claimed the portion of the Arctic between 60°W and 141°W longitude, extending all the way north to the North Pole: all islands in this region are Canadian territory and the territorial waters claimed by Canada surround these islands. Views of territorial claims in this region are complicated by disagreements on legal principles. Canada and the USSR/Russia have long claimed that their territory extends according to the sector principle to the North Pole. The United States does not accept the sector principle and does not make a sector claim based on its Alaskan arctic coast. Claims that undersea geographic features are extensions of a country's continental shelf are also used to support claims; for example the Denmark/Greenland claim on territory to the North Pole, some of which is disputed by Canada. Foreign ships, both civilian and military are allowed the right of innocent passage through the territorial waters of a littoral state subject to conditions in the UN Convention on the Law of the Sea [1] The right of innocent passage is not allowed however, in internal waters, which are enclosed bodies of water or waters landward of a chain of islands. Disagreements about the sector principle or extension of territory to the North Pole and to the defintion of internal waters in the arctic lie behind differences on territorial claims in the Arctic. This claim is recognized by most countries with some exceptions, including the United States; Denmark, Russia, and Norway have made claims similar to those of Canada in the Arctic and are opposed by the EU and the US.
This is especially important with the Northwest Passage. Canada asserts control of this passage as part of Canada's internal waters because it is within 20 km of Canadian islands; the US asserts that it is an international waterway. Today ice and freezing temperatures makes this a minor issue, but global warming may make the passage more accessible to shipping, something that concerns the Canadian government and inhabitants of the environmentally sensitive region.
Similarly, the disputed Hans Island (with Denmark), in the Nares Strait west of Greenland, may be a flashpoint for challenges to overall Canadian sovereignty in The North.
