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How did the 1949 voyage of the research vessel Vityaz influence study of the Sea of Okhotsk?

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Vertical physical map showing the seas of Japan and Okhotsk, highlighting underwater basins, trenches, and ridges, as well as the coastlines and boundaries of Russia, China, North Korea, South Korea, and Japan. Major cities, islands, and peninsulas such as Vladivostok, Tokyo, Hokkaido, Sakhalin, Kamchatka Peninsula, and the Kuril Islands are labeled. Water depths are indicated with color shading, and an inset locator map shows the region's position in East Asia.
Sea of Okhotsk

The 1949 expedition of the Soviet research vessel Vityaz is significant because it marked the beginning of the modern stage of oceanographic research in the Sea of Okhotsk. This voyage initiated a period of systematic scientific investigation that has been continued by Russian scientists to the present day.1