 In the eleven combat patrols of her career the U-boat sank seven vessels; six merchant ships totalling between February and November 1942, and the patrol gunboat on 5 August 1943.She was initially involved in a short journey from Trondheim to Kirkenes, both in Norway in July 1941.The submarine's first and second patrols were marked by no more than an unsuccessful attack by a Soviet submarine off Kildin Island which caused no damage.