Northwest Passage

The Northwest Passage is a network of sea routes through the Canadian Arctic Archipelago connecting the Atlantic and Pacific Oceans. Its channels are seasonally icebound, and their navigability varies with sea ice and route choice.

Canadian Arctic Archipelago: A vast group of islands in northern Canada, separated by channels and surrounded by Arctic waters. Its islands and channels form the route’s defining geography.
John Cabot: An Italian navigator who led English-sponsored voyages across the North Atlantic in the late fifteenth century. His voyages helped spur English searches for a northern route to Asia.
Roald Amundsen: A Norwegian polar explorer who led the first ship to complete a voyage through the Northwest Passage, from 1903 to 1906. His expedition made the first confirmed full transit by ship.
Arctic sovereignty: The exercise and contestation of national authority over Arctic territories, waters, and resources. Canada’s claim over archipelago waters shapes the passage’s legal status.
Arctic sea ice: Sea ice that forms and melts seasonally across the Arctic Ocean. Its extent and thickness govern when passage through the channels is possible.
Martin Frobisher: An English mariner who led three expeditions to the Canadian Arctic between 1576 and 1578. His voyages were among the earliest European attempts to find the passage.
John Franklin: A British naval officer whose 1845 expedition to find the Northwest Passage disappeared in the Canadian Arctic. The loss of his expedition prompted decades of searches across the archipelago.
United Nations Convention on the Law of the Sea: An international treaty establishing rules for maritime zones, navigation, and ocean resource rights. Its rules frame disputes over whether the passage is internal or international waters.
Amundsen Gulf: A gulf between Banks Island and mainland Canada, opening westward into the Beaufort Sea. It is a key western segment on several Northwest Passage routes.
Henry Hudson: An English navigator whose early seventeenth-century voyages explored the North Atlantic and Arctic regions. His searches for a northern route included exploration of Hudson Bay.

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