Information for this map has been gathered from the expeditions of the International Geophysical Year, 1957-1959, and from the expeditions of the research ship Vityaz.
Covers the southwest Kuril-Kamchatka Trench, the southern Kuril Islands and Hokkaido.
"Masshtab 1 : 250 000 po paralleli 48°" = "Scale 1:250,000 at parallel 48°"
"Karta sostavlena po materialam ėkspedit︠s︡iĭ mezhdunarodonogo geofiziicheskogo goda 1957-1959 godov i ėkspedit︠s︡iĭ „viti︠a︡zi︠a︡“ v predshestvui︠u︡shchie gody, 1960 g."
"The map was compiled from the materials of the expeditions of the international geophysical year 1957-1959 and the expeditions of the "Vityaz" in previous years, 1960."