In 1903, explorer Roald Amundsen, while looking for the Northwest Passage, sailed through the James Ross Strait and stopped at a natural harbour on the island's south coast. Unable to proceed due to sea ice, he spent the winters of 1903-04 and 1904-05 in Usqsuqtuuq (Gjøa Haven). There he learned Arctic living skills from the local Netsilik Inuit, skills that would later prove invaluable in his Antarctic explorations. He used his ship Gjøa as a base for explorations in the summer of 1904, sledding the Boothia Peninsula and travelling to the magnetic North Pole. Amundsen finally left, after 22 months on the island, in August 1905. The harbour where he lived is now the island's only settlement, Gjøa Haven, which he called 'the finest little harbour in the world.'