 The two boats were built in 1960, and commissioned under the names "Hugin" and "Munin", after the ravens of Norse mythology.They were designated the "Nasty-Klasse" and "SchnellbootTyp 152".The two vessels remained in service for four years, but the design/experiment was not a success, and the "Bundesmarine" disposed of the boats by transferring them to the Turkish Navy in 1964.