Russian submarine Minoga

Minoga (Russian: Минога, lit. 'lamprey') was a unique submarine designed by Ivan Bubnov that became the first diesel-electric submarine in the Imperial Russian Navy. It was inspired by the experience of earlier Russian submarines during the Russo-Japanese War. Minoga was ordered in February 1906 and laid down in September of that year at the Baltic Works in Saint Petersburg. It was launched in October 1908 and entered service in October 1909. It was the first submarine in the Russian Navy to use a diesel engine for power, and its armament included two torpedo tubes, one deck gun, and one machine gun.

Its early service was largely uneventful with the exception of a sinking accident during a training dive in April 1913, after which the submarine was recovered using a crane and there were no casualties among the crew. During World War I Minoga served in the Baltic Fleet and carried out a total of fourteen war patrols. There was only one occasion, in May 1915, that Minoga had the opportunity to fire a torpedo in combat, without success. It was also present at the Battle of the Gulf of Riga in August 1915. Minoga was in Petrograd during the Russian Revolution and was acquired by the Soviet Navy.

Minoga was put into storage in January 1918 and became part of the reserve fleet. In November of that year it was transferred to the Caspian Sea and saw action against the Allied intervention in the Russian Civil War. It was later stored in Baku before being struck from the navy list on 21 November 1925 and scrapped.