 "Lembit" carried out a total of seven patrols during the German-Soviet war.Also on Lembit's mines was damaged on 24 November 1944 the German auxiliary patrol vessel "V 305 / Halbertstadt".On 18 June 1946, "Lembit" was renamed "U-1"; on 9 June 1949 "S-85"; on 30 January 1956; "STZh-24" on 27 December 1956 "UTS-29".