Klaus Bargsten
Klaus Bargsten was the captain and sole survivor of sunken U521. He was also a recipient of the Knights Cross of the Iron Cross . The Knights Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership.
Bargsten was born onOctober 1911 in Bad Oldesloe. His mother came from an aristocratic family, and his father was of peasant stock. His grandfather had made a fortune in farm machinery and banking. After completing his schooling, Bargsten attended a school for training merchant marine officers and was later employed by North German Lloyd Steamship Co. He served mostly on freighters but was also on the SS160Europa for a time. He joined the Nazi party but received such adverse criticism from his family that he later resigned.
Source: Wikipedia