The Albatross expedition was a Swedish oceanographic expedition that between July 4, 1947, and October 3, 1948, sailed around the world during 15 months covering 45 000 nautical miles. The expedition is considered the second largest Swedish research expedition after the Vega expedition. The expedition was carried out on board the newly built training ship of the Boström line, Albatross. Since the Boström line lent the ship at almost no cost, the expedition could be financed and carried out with only private donations. The leader of the expedition was Hans Pettersson.