In the spring of 1906 SN Vlassieva girl had just made a call for a training squad of submariners. He became commander of the Underwater boat "Mackerel", and in 1907 and sees a submarine "Gudgeon."
At the end of 1907, responding to criticism of the idea of the creation of the submarine fleet, coming from a number of senior naval officers, Vlasiev spoke on "The report of the commander of the submarine" Minnow "on voyages and maneuvers", which resulted in serious reasons in favor of the future development of the submarine fleet. The ideas expressed in the report Vlasyevo, found a support in the face of eminent Russian shipbuilder, Krylov and in 1907 he became commander of the new submarine "Akula", taking particular role in the design of its mine arms. SN Vlasyevo belongs to a number of developments of methods of doing underwater combat and group use of submarines in combat operations of the fleet.
During the First World War, commanding the "Shark", Vlasiev made several independent combat operations. First attack of "Sharks" occurred Aug. 26, 1914. Submarine torpedivala towards the approaching enemy destroyers that dampen their ardor and forced to abandon the attack. In 1915, by order of the commander of the Baltic Fleet SN Vlasov was awarded the Order "For the good a patrol in a war zone", then was appointed commander of the 5th Division of the Baltic Fleet submarines. In August 1915, SN Vlasov was transferred to the Black Sea fleet, the transport fleet, and in 1916 — in the 1st Baltic naval crew.
In civilian war Vlasiev joined the Volunteer Army, which operated in the south of Russia. From November 1918g.on headed sea defense separate Odessa volunteer brigade. In January, 1919. in Odessa during the declared Chief of Defence of the Russian Federation South, forming the second unit riverboats appointed him head of the creator of the idea — Captain 2nd Rank SN Vlasiev. From February to June Vlasiev was busy manning and equipping of ships of the newly formed group. After the river detachment was disbanded and instead it was created Division of river boats, the captain Vlasiev took command of the French destroyers "Restless" and "Captain Saken", then moved on to the battleship "General Alekseev." In July 1920. SN Vlasov was promoted to the rank of Captain 1.
In November 1920. Vlasov, a member of the Union of Russian naval officers left the Crimea, being in Constantinople, and in November 1922 went to the captain of your own last big one: he led requisitioned by the French for the debts of Russian trawlers and tugs in the port of Marseilles. Vlasiev in 1923 he settled in Paris, where he worked as a taxi driver. After the end of the stateliness Russian managed to build a bridge to the Russian Federation — he became a citizen of the USSR. Russian sea Officer S. Vlasiev died in exile in 1955 and was buried in the Paris cemetery of eminent Russian emigrants Sainte-Genevieve-des-Bois.
According to the materials http://alerozin.narod.ru, militera.lib.ru/db/merkushov_va2/index.html