Severnaya Zemlya any traces of land to the north of the wide strait between the Kara Sea and the Laptev Sea that they navigated. The archipelago was not put on the map until the 1913–1915 Arctic Ocean Hydrographic Expedition of icebreakers "Taimyr" and "Vaigach". The chief organiser and first captain of the Vaygach was officer Aleksandr Vasiliyevich Kolchak of the Imperial Russian Navy. The expedition was privately financed and was launched in 1910, being led by Boris Vilkitsky on behalf of the Russian Hydrographic Service. This venture accomplished its goal of exploring the uncharted areas of the continental side of the Northern
Russian Arctic islands fourth largest island in Europe. The Russian Empire officially claimed the Arctic islands to its north in a Note of the Russian Government of 20 September 1916 - this covered the islands of Henrietta, Jeannette, Bennett, Herald, Edinenie, New Siberia, Wrangel, Novaya Zemlya, Kolguev, Vaigach and others. On 15 April 1926, the Soviet Union reaffirmed this claim. The area includes from west to east: Russian Arctic islands The Russian Arctic islands are a number of islands groups and sole islands scattered around the Arctic Ocean. The islands are all situated within the Arctic Circle and are scattered through the marginal