At 03.05 hours on 17 March 1943, U-338 fired a
spread of two torpedoes at the convoy SC-122 southeast
of Cape Farewell and Kinzel thought that he had hit one
ship, but in fact the Kingsbury and the
King Gruffydd were hit and sunk. At 03.06 hours, a
second spread of two torpedoes was fired, one of them
struck the Alderamin which sank later in 51°30N/34°55W.
At 03.07 hours, the stern torpedo was fired, which
missed the intended target, the Alderamin, but damaged
the Fort Cedar Lake.