from Kaleun Viking's SH3 Commander personnel file:
"After a year in captivity, Viking returned in May 1946 and worked on the salvage of sunken ships in the Rhine river.
In 1948 with three comrades he built the sailing ship Magellan. They sailed together to Buenos Aires, Argentina, where they started a great regatta. Later he was skipper on several trade ships.
In March 1959 he showed great courage as skipper of the freighter Inga Bastian when he and his crew saved 57 survivors from the burning Brazilian ship Commandante Lyra.
In 1961 he became captain of the German nuclear research ship Otto Hahn, a post which he held for more than ten years.
For his outstanding merit after the war he was decorated in 1974 with the Bundes-Verdienstkreuz am Bande (Federal Merit Cross on ribbon).
He was for long years the chairman of the U-Bootskameradschaft Bremen, which bears his name to this day. He died on 18 April 1986 in Bremen."