At the same year, she was transferred to the Royal Norwegian Navy, and served under the name HNoMS Valkyrien as a motor torpedo boat tender between 1953 and 1963.

Her triple expansion steam engines developed 1,473 IHP, and during sea trials she attained a maximum speed of 13.45 knots.

[2] On 1 July 1952 the ship was bought by the Royal Norwegian Navy, converted to a motor torpedo boat tender at the Bergen Mekaniske Verksted yard at Laksevåg, and was commissioned as Valkyrien in June 1953.

In this non-Maigret novel (French title Le Passager du Polarlys) the ship's captain (whose character is not unlike Maigret) has to turn detective after a German police investigator has been murdered on board his ship, in connection with the drug-related death of a young model in the Montparnasse painters and drop-outs Parisian community of the roaring twenties.

The whole story unfolds during the trip from Hamburg (then the start of the Bergen Steamship Company arm of the Hurtigruten) to the northern Hurtigruten terminal in Kirkenes where the criminal commits suicide by jumping overboard, while his female accomplice (and sister) attempts escape to Soviet Union (then without extradition agreements with capitalist western countries).