<prompt> Kamilisha sentensi ifuatayo: Mnamo 1941, ujenzi wa kituo cha nyambizi cha DORA 1 ulianza huko Trondheim. Miaka miwili baadaye, mnamo Juni 1943, meli hiyo ilipelekwa kwa kamanda wa meli hiyo, Korvettenkapitän baadaye Fregattenkapitän Rolf Rüggeberg. 13 th submarine flotilla was a front line unit, and a total of 55 Type VIIC and a hrefGerman20Type20VII20submarine23Type20VIIC.2F41VIIC41a served with it until the  <response>: mwisho wa vita Mei 1945. 