K-3 was a project 627 Kit (whale) was a submarine of the Soviet Navy and the first nuclear submarine of the Soviet Union. On 17 June 1962, by this time under the command of Zhiltsov, K-3 reached the North Pole underwater, the first among Soviet submarines (a feat performed nearly four years earlier by USS Nautilus). The submarine also surfaced on the Pole (a feat performed three years before by USS Skate). For this voyage, she was awarded the name Leninsky Komsomol on 9 October 1962, and her crew, rather than training in military operations, began taking part in many congresses and conferences.

On 8 September 1967, while transiting the Norwegian Sea, a fire broke out in the submarine's hydraulic system, and crew members in the compartment when the fire broke out had to evacuate the compartment. The flames spread to other parts of the submarine. The automatic extinguishers were based on carbon dioxide gas, which killed the crew members who were in the first and second compartments in the submarine. When the dividing door in the bulkhead from the third compartment was opened to see what had happened to the people in the second compartment, the gas spread, and more people lost consciousness. The forward compartments were then completely sealed off, and the submarine surfaced. Four days later, Leninsky Komsomol returned to base. 39 crew members died in the fire. In 1991 a memorial was erected in Zapadnaya Litsa to the men lost aboard K-3. In 2007 the Russian Awards Committee issued the medal "For 50 Years Of The Submarine "Leninskiy Komsomol"".

The submarine was decommissioned in 1988. Since its retirement the K-3 has been docked at the Nerpa Shipyard, Murmansk The K-3 is set to become part of The Museum of Naval Glory in Kronstadt and is expected to be open for visitors by early 2023.

Note: Use SHIPs instead of planes