U-47 disappears after the OB 293 battle
U-47, U-99 and U-70 attacked outward convoy OB 293 on the night of 6–7 March. U-70 was sunk by the escorts, while U-47 was sighted during the battle and then failed to report again; Prien and his entire crew were lost. The precise cause of U-47's loss remains uncertain. Later accounts long credited HMS Wolverine, but the evidence does not permit a secure attribution. What can be established is that U-47 disappeared immediately after operating around OB 293 and that BdU's requests for a position report went unanswered.