Shipping Company Losses of the Second World War - Ian M. Malcolm - Google Books

https://books.google.de/books?id=IAA7AwAAQBAJ&pg=PT348&lpg=PT348&dq=Kptlt.+Udo+Heilmann&source=bl&ots=Zq4k5KFmd0&sig=sdtLKXUeJ1J

During the Second World War, the Merchant Navy suffered a higher percentage loss than any of the British armed forces, but despite this extraordinary fact few people today are aware of it. In total, 33,000 merchant seamen died, while others were severely…