At 22.56 hours on 30 April 1943, U-515 fired two stern torpedoes at convoy TS-37 about 130 miles southwest of Freetown and observed hits after 58 and 59 seconds. The first ship was seen sinking fast and another broke in two after being hit under the bridge. At 22.57 hours, one torpedo was fired, which struck a freighter amidships after 52 seconds. A fourth torpedo fired one minute later struck another freighter amidships, which exploded. At 22.59 hours, a fifth torpedo was fired and struck after 1 minute a ship, which immediately sank. A sixth torpedo fired at 23.01 hours hit a freighter after 1 minute 30 seconds, but the sinking could not be observed. Henke claimed five ships of 31,000 grt sunk and another of 6000 grt probably sunk. However, only four ships were hit and sunk, the Corabella, Bandar Shahpour, Kota Tjandi and Nagina.

Nine crew members from the Corabella (Master Peter Leggett) were lost. The master, 30 crew members and eight gunners were picked up by HMS Birdlip (T 218) (Lt E.N. Groom, RNR) and landed at Freetown the next day.