German submarine U was a Type IIB Uboat of the German Kriegsmarine based out of Kiel during World War II It was one of the smaller versions and was first launched on July Its first commander was Harald Grosse U would have commanders total over the course of its service the last being Jurgen Kriegshammer It was too small to undertake sustained operations far away from the home support facilities and its primary role was found to be in the training schools preparing new German naval officers for commandSource of image KGB archive Ukraine Stampted with a Russian stamp and cancelled