Northeast Passage
The Northeast Passage (abbreviated as NEP; Russian: Северо-Восточный проход, romanized: Severo-Vostochnyy prokhod, Norwegian: Nordøstpassasjen) is the shipping route between the Atlantic and Pacific Oceans, along the Arctic coasts of Norway and Russia. The western route through the islands of Canada is accordingly called the Northwest Passage (NWP).

The NEP traverses (from west to east) the Barents Sea, Kara Sea, Laptev Sea, East Siberian Sea, and Chukchi Sea, and it includes the Northern Sea Route (NSR). The Northern Sea Route is a portion of the NEP. It is defined in Russian law and does not include the Barents Sea and therefore does not reach the Atlantic Ocean. However, since the NSR has a significant overlap over the majority of the NEP, the NSR term is often used to refer to the entirety of the Northeast Passage. This practice injects confusion in understanding the specifics of both navigational procedures and jurisdiction.

The Northeast Passage is one of several Arctic maritime routes, the others being the Northwest Passage (going through the Canadian Arctic Archipelago and the coast of Alaska) and the Transpolar Route (going across the North Pole).

The first confirmed complete passage, from west to east, was made by the Finland-Swedish explorer Adolf Erik Nordenskiöld, with the Swedish ship Vega 1878–79 backed by the royal funding of king Oscar II of Sweden. Nordenskiöld was forced to winter just a few days' sailing distance from the Bering Strait, due to pack ice.
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