Multi-purpose test boat of the German Navy, the WTD 71 (Maritime Technology and Research) supposed. The sister ship is the STOLLERGRUND (Y 899). Both boats are to be the test boats of the old Stollergrund class and the Wilhelm Pullwer class take off. Built at the Fassmer shipyard in cooperation with Western Baltija Shipbuilding/Klaipeda. 51.7 m length x 10.2 m, 13 kn