Kammala jumla mai zuwa: A shekara ta 1939 Blue Star Line ya yi amfani da jiragen ruwa 39, dukansu sun ba da sabis na yakin duniya na biyu. A cikin 1940 an kama wani jirgin ruwa mai suna "Imperial Star" wanda Burmeister &amp; Wain ya gina a Denmark a cikin
Jamus ta mamaye Denmark kuma ta kammala a matsayin "Kriegsmarine" jirgin ruwa mai zurfi.