Steamship Corporation of Mobile, Alabama, but sailing under the Panamanian flag. The ship was about from the main convoy having developed problems with her boilers. One torpedo hit the ship in the engine room, and she listed and finally sank at 15:50. The master, 39 crewmen and 12 armed guards abandoned ship in a lifeboat and raft. Eleven crewmen and two armed guards were lost. The U-boat surfaced and took the survivors on board to be questioned, and provided them with supplies of whiskey, food, cigarettes and matches before returning all but the master (who was kept as a prisoner) to their lifeboats. They were picked up on 19 September by the merchant ship Irish Larch. HMCS Ottawa At 02:05 on 14 September U-91 fired two torpedoes at a destroyer and observed a hit. Then they saw another destroyer, made a full circle, and fired another torpedo at 02:15, which hit amidships and caused the ship to explode and sink immediately. They thought that they had sunk two destroyers, but in fact it was , which was hit twice. Only 67 of her crew of 181 survived. By now though the convoy was within range of aircraft from Newfoundland and the escorts were reinforced by the destroyers and , forcing the U-boats break off their attacks and disperse. Olaf Fostenes At 09:21 on 18 September, the unescorted 2,994-ton Norwegian merchant ship Olaf Fostenes was hit by one of two torpedoes fired by U-380 on her starboard side. Another torpedo struck on her port side at 11:20 and sank her without loss. The crew of 36 abandoned ship in two lifeboats. The U-boat surfaced and asked for the master, but were told that he had been lost. The survivors set sail for Newfoundland, were spotted by an aircraft on 26 September, and soon picked up by . Esso Williamsburg On 18 September at 01:16, about south of Cape Farewell, Greenland, U-211 sighted the unescorted 11,237-ton American tanker Esso Williamsburg loaded with of Navy special fuel oil en route from Aruba to Reykjavík. The U-boat fired two torpedoes at the tanker, but missed, and then lost contact due to very poor visibility. U-211 eventually reacquired her target, and at 00:26 on 23 September, fired a torpedo which struck her amidships, causing a violent explosion which set the ship on fire. Ten minutes later, another torpedo was fired but missed. At 01:05, a