Ƙirƙirar wani nau'i mai rikitarwa na wannan jumla Jirgin ruwa na Jamus " U-15 " shi ne nau'in IIB U-boat na " Kriegsmarine ".
Tabbas, mafi rikitarwa na jumla shine "Jamusanci jirgin ruwan karkashin ruwa '' U- 15 'wani nau'in IIB U-boat na Jamus 'Kriegsmarine', wanda aka ba da umarnin a ranar 7 ga Maris, 1936 bayan an gina shi a Deutsche Werke shipyards a Kiel. "