Sidorov Konstantin Efimovich 
(21.05.1862–28.05.1933)

Arctic Hydrograph, Colonel Corps hydrographs. 
Born in Arkhangelsk. In 1887 he graduated from the navigational department of the Technical School of the Naval Department. After graduating from college until 1910 he worked on the shooting of Lake Onega, served as a navigator in military courts, conducted hydrographic surveys of the Baltic Sea. 
From 1910 to 1914, Sidorov was the head of the party engaged in shooting the Murmansk coast, and also commanded the hydrographic ship "Pakhtusov", who conducted the shooting in the Kara Sea. He became a pioneer in the organization and construction of the first hydrometeorological radio stations in the area. Under his leadership, polar stations were built on Vaigach Island, in the Yugorsky Shar Strait, on Mar-Sale, which began operations in 1914. In the same period, he was engaged in the hydrography of the White Sea. 
In 1915–1917 Sidorov was the head of the hydrographic party, which worked in the Finnish skerries. After 1917, he joined the Main Hydrographic Office as an assistant to the head of the cartographic department. 
After graduating from the naval service Sidorov from 1926 until the end of his life he worked in the Yakutsk Commission of the Academy of Sciences, being one of the main compilers of the Yakut ASSR map in 1: 2,000,000 scale.Already after the death of Sidorov in 1936, his fundamental work on the topographic study of the Soviet Arctic was published, which for many years was a valuable reference material. It still attracts people interested in the history of the development of the Russian Arctic.

The merits of Sidorov are marked by the orders of St.Stanislav of the 2nd degree, St.Anna of the 2nd degree, St.Vladimir of the 3rd and 4th degrees.

Suddenly died on coming home from service in Leningrad. 
An island in the Kara Sea in the group of islands of the Arctic Institute. Opened and named in 1932 by the expedition on the icebreaking ship “A. Sibiryakov". At the same time, this island was seen from the icebreaking steamer "Rusanov", moving from Dixon to the Northern Land, but paved its course somewhat to the west.