At 01.28, 01.31 and 01.49 hours on 17 Oct, 1941, U-558 fired her bow torpedoes from the starboard quarter at the convoy SC-48 and reported a possibly hit on a tanker, another tanker and one steamer sunk. The U-boat sank the ships in station #103 and #104, the W.C. Teagle and Erviken. At 02.14 hours, the stern torpedo was fired, which sank the Rym.
It seems that the Erviken (Master Paul Heesch) was hit, while she stopped to rescue survivors from another torpedoed ship and sank within three minutes. The master and 18 other Norwegians, five British and one Danish died. The 14 survivors were picked up from their raft by two corvettes after about four hours. One of the corvettes stayed in the area until daylight, but no more survivors were found, only the drifting wreck of the Rym, which was scuttled by gunfire and set course for Londonderry. It is possible that two survivors from the Erviken were picked up by the British destroyer HMS Broadwater. They died when the destroyer was sunk by U-101 one day later.