SM U-29[Note 1] was a Type U-27 U-boat of the Imperial German Navy. She served during the First World War.
U-29's last commander was Captain Otto Weddigen. ...
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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 purposefully sunk by a battleship.
^ Gröner 1991, pp. 6–7.^ "History.ney.mil, Dreadnought". Archived from the original on 27 June 2014. Retrieved 30 December 2009.Cite error: There are [ tags on this page, but the references will not show without a {{reflist|group=Note}} template (see the help page).]