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The Voyage of Sibiryakov, 1932

Prior to the summer of 1932 only three ships had succeeded in traversing the Northern Sea Route: Nordenskiöld's Vega in 1878–79 from Atlantic to Pacific (Nordenskiold, 1881) and the Imperial Navy icebreakers Taymyr and Vaygach from Pacific to Atlantic in 1914–15 (Starokadomskiy, 1976, p 180–262). Both of these expeditions were unable to complete the passage in one season, but were forced by ice conditions to winter in the Arctic.