At 11.17 hours on 22 Feb 1943, HMCS Weyburn (K 173) (A/LtCdr T.M.W. Golby, RCNR) hit a mine laid by U-118 on 1 February 4 miles west of Cape Spartel. After refueling the corvette had just reached her position in the screen of convoy MKS-8 when the explosion occured and disabled the ship. HMS Wivern (D 66) (Cdr M.D.C. Meyrick, RN), escorting the nearby convoy GUS-4, immediately went alongside and took off three officers and 28 ratings while the ship settled by the stern. The crew tried hard to remove all primers from the depth charges, but two of them detonated after the corvette sank at 11.56 hours, disabling the main and auxiliary machinery of the destroyer lying about a cable away and killing some men in the water. SubLt Bark died in the attempt to rescue the unconscious commander from the sinking vessel and one crew member from the destroyer died of wounds after being injured while helping the wounded aboard the corvette. In addition to these three men, seven ratings and a passenger were lost and another rating died aboard HMS Black Swan (U 57) (Capt T.A.C. Pakenham, RN), which had picked up 41 ratings from the corvette and 16 ratings from the destroyer between noon and 14.00 hours. Afterwards the sloop took the disabled HMS Wivern in tow until being relieved by HMS Destiny (W 115) and then landed the survivors, including 16 ambulance cases, at Gibraltar.