German submarine U-1172 was a Type VIIC/41 U-boat built for Nazi Germany's Kriegsmarine for service during World War II.She was laid down on 7 June 1943 by Danziger Werft, Danzig as yard number 144, launched on 3 December 1943 and commissioned on 20 April 1944 under Oberleutnant zur See Jürgen Kuhlmann.