Vilkitsky Island (East Siberian Sea) Russian Arctic Ocean Hydrographic Expedition led by Boris Vilkitsky on the ships "Taymyr" and "Vaygach" on behalf of the Russian Hydrographic Service in order to chart the last blank areas of Russian maps. Vilkitsky Island (East Siberian Sea) Vilkitsky Island (; "Ostrov Vilkitskogo") is the southernmost island of the De Long group in the northern part of the East Siberian Sea. Administratively Vilkitsky Island belongs to the Sakha Republic administrative division of the Russian Federation. The island is named after Russian hydrographer Boris Vilkitsky. The island is outside of the limits of permanent ice and is unglaciated. At barely Vilkitsky
East Siberian Sea the northernmost city of mainland Russia. The present name was assigned to the sea on 27 June 1935 by Decree of the Soviet Government. Before that, the sea had no distinct name was intermixedly called in Russia as "Indigirskoe", "Kolymskoe", "Severnoe" (Northern), "Sibirskoe" or "Ledovitoe". The International Hydrographic Organization defines the limits of the East Siberian Sea as follows: "On the West." The Eastern limit of Laptev Sea [From the Northern extremity of Kotelni Island – through Kotelni Island to Cape Madvejyi. Then through Malyi Island, to Cape Vaguin on Great Liakhov Island. Thence to Cape Sviaroy Noss on the