Leytenant Sergeyev () was a built for the Imperial Russian Navy in the German Empire during the first decade of the 20th century. Completed in 1907, she initially served in the Pacific Fleet, then the Arctic Flotilla and participated in the First World War.
Design and description Leytenant Sergeyev displaced at full load. She measured long overall with a beam of , and a draft of . The ships were propelled by two vertical triple-expansion steam engines, each driving one propeller shaft using steam from four Schichau water-tube boilers. The engines were designed to produce a total of for an intended maximum speed of .Apalkov, pp. 167, 169 During Leytenant Sergeyevs sea trials, she reached Afonin, p. 15 from . The ship carried enough coal to give her a range of at . Her crew numbered 68 officers and men.
The main armament of the Inzhener-mekhanik Zverev class consisted of two 50-caliber guns, one gun each at the forecastle and stern. Their secondary armament included four guns, two guns on each broadside. One pair was abreast the forward superstructure and the other between the aft superstructure and the stern gun. All of the guns were fitted with gun shields. Leytenant Sergeyev carried six machine guns. The ships were equipped with three torpedo tubes in rotating mounts. The forward mount was located behind the forward funnel while the other two were fore and aft of the rear funnel.Breyer, p. 49
Construction and career Leytenant Sergeyev was laid down on 8 January 1905 by Schichau-Werke at their shipyard in Elbing, East Prussia, but she was disassembled and shipped by rail to Vladivostok where she was assembled. The ship was launched in 1907 and entered service later that year with the Pacific Fleet. She was transferred to the Arctic Flotilla in 1917.Berezhnoy, p. 276
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