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Sergey Nikolaievich Kravkov (in Russian Сергей Николаевич Кравков) was a Soviet hydrographer and Arctic explorer. == Biography == Sergey Nikolaievich Kravkov was born 23 November 1894 in Saint Petersburg in the family of a prominent Russian pharmacologist Nikolai Kravkov (1865-1924) and his wife Olga Evstafievna, née Bogdanovskaya (1868-1942), daughter of an outstanding Russian surgeon Evstafi Bogdanovsky. He spent his childhood with his parents in Germany and Austria-Hungary, after their separation in 1898 lived with his mother in Odessa. In 1909-1914 Sergey Kravkov studied at the Sea Cadet Corps in Saint Petersburg. After the graduation he was made a midshipmen. During World War I Sergey Kravkov served in the Black Sea Fleet. In the battle of Cape Sarych on 18 November 1914 against German battlecruiser SMS Goeben and light cruiser SMS Breslau he adjusted the artillery fire of the battleship Tri Sviatitelia. During the battle Kravkov made sketches in water color, published in the magazine “Morskoi sbornik” (# 11, 1915). In 1917 lieutenant Kravkov completed the navigation courses in Sevastopol and got the rank of Class I Navigator. In 1918 he was transferred to Odessa Hydrographic Department. In November 1919 set out from Odessa to Vladivostok on a transportship Ierusalim. In Vladivostok he took the side of the Red Army. During Japanese intervention he went underground. In October 1922 Sergey Kravkov was appointed Flag Officer Navigator of the Navy Headquarters of the Far East. After its reorganization in 1923 he was sent to Omsk to the Board of Security of Navigation in the Kara Sea (Ubekosibir). In 1923-1926 Sergey Kravkov explored polar seas forming part of Ubekosibir expeditions. In 1930 he got a diploma of the deep sea navigator. In 1930-1932 he carried on hydrographic works in the Taz Estuary and the Gulf of Ob. He made sketches for the first pilot chart of the Gulf of Ob. Since 1932 Sergey Kravkov had been specializing in astronomic works on the Northern Sea Route. His astronomical points in the Minina Skerries, Khalmyer Bay (Gydanskaya Guba) and on the East Siberian sea coast had been the basis of the maps of those areas for long. In the intervals between navigations Sergey Kravkov taught a course of shipbuilding at the Omsk Water College. He also was in charge of a hydrometric station of the Irtysh water way. During supervision of the delta of the Lena in winter 1940 Sergey Kravkov got his feet and hands severely frostbitten. He was sent to Tiksi settlement hospital. The doctors saved his life, but his hands and feet had to be amputated. Being an invalid, Sergey Kravkov moved to Leningrad where his mother and sister lived. Since April to October 1941 he worked in the archives of the Hydrographic Department of the Chief Directorate of the Northern Sea Route (Glavsevmorput). Sergey Kravkov refused to be evacuated from besieged Leningrad hoping for its soon liberation. He died of denutrition together with his mother and sister in February 1942. Sergey Kravkov and his relatives were buried on the Serafimovskoye cemetery, the exact location of their grave is unknown. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sergey Nikolaievich Kravkov」の詳細全文を読む スポンサード リンク
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