At 22.14 hours on 29 October 1944 U-958 fired a spread of three T-3 torpedoes at a barge and a coastal patrol craft north of Osmussaar in the Gulf of Finland, heard a detonation after 2 minutes and 21 seconds but made no observations as the U-boat was forced to evade the escorts and escaped without damage after counting 42 depth charge explosions. The landing craft SB-2 was sunk during this attack while transporting troops and war material to Saarenmaa for the Moonsund Landing Operation.