Helmut Krestan served in the U Boat fleet and was in the period 1943-1944 onboard the U 666. (Type VIIC) On February 10th 1944 the U 666 is listed as missing in action and her last know position is West of Ireland. The U 666 was attacked by a plane from the British aircraft carrier HMS Fencer on February 2nd 1944 and probably destroyed than.
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