orpedoes were fired individually. Two torpedoes hit 52 and 41 seconds after firing the first torpedo. The first torpedo was seen to pass ahead of the U-boat and the second seen to hit it under the forehatch, which made the running time 19 seconds, giving a running range of 500 yards. The third torpedo was heard to hit 10 seconds later, fitting in with the firing interval. Almost immediately after the second explosion I saw the stern of the U-boat rise high out of the water at an angle of 60 degrees and she then sank within about four seconds.