At 01.31 hours on 17 Oct 1941, U-558 fired one torpedo at W.C. Teagle in station #103 of convoy SC-48 and sank her about 600 miles west of Rockall. Erviken in station #104 and Rym in station #85 both slowed down to pick up survivors, the latter actually had to alter course to avoid a collision. At 01.49 hours, the U-boat sank the stopped Erviken with a stern torpedo. Seeing this the Rym immediately tried to reach convoy again at full speed but was chased not only by U-558 but also by U-432 (Schultze), which observed how Krech torpedoed and sank her at 02.14 hours.

The Rym (Master Conrad Rustad), armed with five machine guns, was hit by a torpedo on the starboard side between #1 and #2 hatches and broke in two. The forward part was torn away to port and the ship only kept together by the deck cargo of timber with a heavy list to starboard. The bridge and the starboard lifeboat had been destroyed, so 16 survivors abandoned ship in the port boat. The master, the first engineer and three crewmen remained aboard and tried to save the ship. HMS Veronica (K 37) (LtCdr D.F. White, RNR (rtd)) arrived about three hours after the ship was torpedoed, picked up the men in the boat and stayed in the area until dawn. At daylight it became clear that the vessel could not be saved so the five men went aboard the corvette, which rejoined convoy after scuttling the wreck by gunfire. The survivors were landed at Londonderry on 19 October.