At 01.42 hours on 5 Feb 1942 the unescorted Montrolite (Master John White) was hit by one of two stern torpedoes from U-109 northeast of Bermuda. The U-boat had followed the tanker since 21.22 hours on 4 February. She sank by the stern within five minutes, after being hit by a coup de grâce at 02.32 hours. The master, 26 crew members and one gunner were lost. 17 crew members and three gunners were picked up by the British steam merchant Winkleigh and landed at Halifax on 10 February.