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
Siberian Shelf Sea, and respectively subdivided into the Kara Shelf, the Laptov Shelf and the East Siberian Shelf. Eastwards it merges into the Chukchi Shelf (of the Chukchi Sea) shared by Eurasia and North America (i.e., by Russia and the United States). Westwards it merges into the Barents Shelf of the Barents Sea. Also, the New Siberian Islands and the New Siberian Rift Basin define the 'New Siberian Shelf.' According to the split of the high Arctic by the Lomonosov mid-ocean ridge into the Eurasian Basin and Amerasian Basin, the Siberian Shelf is split between the Eurasian Shelf and the Amerasian Shelf.