SM U-29 (Germany)
…War. U-29's last commander was Kapitänleutnant Otto Weddigen. U-29 was sunk with all hands on 18 March 1915 in the Pentland Firth after being rammed by HMS Dreadnought, the only submarine known to have been purposely sunk by a battleship. Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare…