U-47 and Günther Prien disappeared ten days before the loss of U-99 and U-100. The cause remains uncertain in this account. Possibilities include a technical failure, an accident involving the submarine itself, or damage from convoy escorts using depth charges. None of those explanations is selected as conclusive.
Notable Point · 1:10:34-1:11:16
U-47's disappearance before the HX 112 battle
Possible causes of U-47's loss remain unresolved, despite its proximity in time to the loss of two other leading U-boats.