Promotions:
April 1st, 1929: Offiziersanwärter;
January 1st, 1931: Fähnrich zur See;
April 1st, 1933: Oberfähnrich zur See;
October 1st, 1933: Leutnant zur See;
June 1st, 1935: Oberleutnant zur See;
July 1st, 1938: Kapitänleutnant;
February 1st, 1940: Korvettenkapitän.
Career:
April 1st, 1929: Reichsmarine;
February 3rd, 1938: Kommandeur, U-5;
December 5th, 1939: Kommandeur, U-54.
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