I would posit that handled well, a IX is just as good at harbor incursions. I just today took mine into the Irish Sea, sank 2 of what appeared to be Battleships, and continued on to Liverpool. Of course I was surprised to find that there is no Liverpool harbor.... just a big open area of water.
None the less - got in, got out, avoided mines, ASW trawlers, torpedo boats, and destroyers.
Running silent at periscope depth all the way.
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Tauchen, Volle Fahrt voraus!
Type VIIB U-83, Flotilla Saltzwedel, Wilhelmshaven. Sept. 6, 1939. Angelo Schilling.
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