Very beautiful design, not just he drawing, but the original ship as well. But that was the case with most of the ships, aircraft and vehicles used by Germany in WWII
Very nice
But I doubt if he was ever aboard much; as he seemed to be very uninterested in anything nautical. Still, several carefully placed magnetic mines may have saved everyone a lot of future grief.
Not quite, he was very interested in ships, and was particularly proud of his 'Kriegsmarine', such as the Bismarck and Scharnhorst. He was rarely abourd ships as I understood, because he apparently got seasick very fast...