Karl-Heinz Moehle Reinhard Hardegen Horst von Schroeter U-107 IXB 8 October 1940 217,786 39 14 Lost with all hands 18 August 1944 after depth charging by a Sunderland of 201 Squadron RAF. Günter Hessler Harald Gelhaus Volker Simmermacher Karl-Heinz Fritz U-37 IX 4 August 1938 202,528 55 11 Scuttled, 8 May 1945 Heinrich Schuch Werner Hartmann Victor Oehrn Asmus Nicolai Clausen Ulrich Folkers U-66 IXC 20 March 1940 200,021 33 12 Sunk 6 May 1944 by Grumman F4F Wildcats and Grumman TBF Avengers of USS Block Island, rammed by destroyer escort USS Buckley. Richard Zapp Friedrich Markworth Paul Frerks Gerhard Seehausen U-68 IXC 11 February 1941 197,998 33 10 Sunk 10 April 1944, depth charges and rockets fired by F4F Wildcats and TBM Avengers of USS Guadalcanal.