What made U-boat commander Otto Kretschmer so successful at sinking ships with 37 ships to his record? - Quora
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Fregattenkapitän Otto Kretschmer - German U-boat Commanders of WWII - The Men of the Kriegsmarine - uboat.net
![File:Bundesarchiv Bild Bild 183-2004-0504-500, Interview Otto Kretschmer mit einem Radioreporter.jpg - Wikimedia Commons File:Bundesarchiv Bild Bild 183-2004-0504-500, Interview Otto Kretschmer mit einem Radioreporter.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/6/66/Bundesarchiv_Bild_Bild_183-2004-0504-500%2C_Interview_Otto_Kretschmer_mit_einem_Radioreporter.jpg)
File:Bundesarchiv Bild Bild 183-2004-0504-500, Interview Otto Kretschmer mit einem Radioreporter.jpg - Wikimedia Commons
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9783931533441: Admiral a.D. Otto Kretschmer: Der erfolgreichste U-Boot-Kommandant des Zweiten Weltkrieges 1939-1945:: 3931533441 - AbeBooks
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Otto Kretschmer, German submarine commander and U-boat ace called The Wolf of the Atlantic coming..., Stock Photo, Picture And Rights Managed Image. Pic. MEV-10229310 | agefotostock
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