Kammala wannan jumla: A ranar 13 ga Afrilu 1940 a lokacin da
Yaƙe-yaƙe a kusa da Narvik, Norway "U-46" ya kasance mai zurfi kuma ya lalace sosai ta hanyar tallafawa Birtaniya. Sohler daga bisani ya umurci "U-46" don 'yan kallo shida, amma ya kasa yin nasara a kan jirgin ruwa na abokan gaba. An cire shi daga umurnin a ranar 21 ga Mayu 1940 kuma Engelbert Endrass ya maye gurbinsa washegari. Endrass ya kasance Günther Prien's First Officer a cikin jirgin lokacin da suka shiga Scapa Flow kuma suka nutse jirgin yaƙi. "U-46" ya zama umarninsa na farko.