North Pole-1 was the world's first crewed drifting ice station in the Arctic Ocean, primarily used for research.
Otto Schmidt and pilots of their ANT-6-4M-34R "Aviaarktika" aircraft, a specialized model of the North Pole-1 expedition to the North Pole, from left to right: Ivan Spirin, Mark Shevelev, Mikhail Babushkin, Otto Schmidt, Mikhail Vodopyanov, Anatoly Alekseev and Vasily Molokov, 1937