EML Lembit is a WW2 submarine built in 1937 by the British Vickers–Armstrongs shipyard for the Estonian Navy.
She became part of the Soviet Navy in 1940, made seven war patrols sinking a total of seven enemy ships, and was decommissioned in 1979.
She is now the main exhibit of the Estonian Maritime Museum in the former seaplane hangars at the Seaplane Harbour in Tallinn, Estonia.