Soviet submarine Shch-421

She served in the Northern Fleet during World War II.

She was led by commander Nikolai Lunin, before he was replaced by his second-in-command Fyodor Vidyayev.

The submarine operated in the Northern Fleet and made torpedo attacks during 1941 and 1942, missing multiple targets and sinking one.

[citation needed] On 19 February 1942, she ran aground in Skorbeevskaya Bay.

[2] On 8 April 1942 the submarine suffered heavy damage in a minefield: with no more power and close to enemy shores, the crew built a sail out of the canvas cover and managed to move away from the dangerous area.