O lona sini o le a faaluaina: muamua, o le displacing le Aiga Fleet mai Scapa Flow le a faamaloloina ai le British North Sea poloka ma tuuina Siamani saolotoga sili atu e osofaia le convoys Atalani; lona lua, o le a avea le taia o se gaoioiga faafaatusa o le tauimasui, taia i le nofoaga lava lea e tasi lea na tuuina atu ai le Fleet Siamani High Seas ma scuttled lava ina ua mavae le toilalo o Siamani i le Taua Muamua a le Lalolagi. Dönitz filifilia-lima Kapitänleutnant Günther Prien for the task, scheduling the raid for the night of 13/14 October 1939, when the tides would be the moon and night harpoon. O lona autu o le a faaluaina: muamua, o displacing the Home Fleet from Scapa Flow would loosen the British North Sea blockade and grant Germany greater freedom to attack the Atlantic convoys; lona lua, o le taia o le a avea o se gaoioiga faatusa o le tauimasui, taia i le nofoaga lava lea na tuuina atu ai le Siamani
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