U-Deutschland, after her first cruise, was renamed U 155, her sister ship U 151 was the record holder for the longest single patrol, Martin Niemoller was "Number One" of this boat! I have drawings for U-cruisers U 139/141 and general arangement diagrams for U 151/154 (though they are a little grainy), also pictures of U 140 & 152. I can upload if you want, I would PM Mush Martin for probably better information.
