At 00.24 hours on 15 Sep, 1940, U-48 attacked the convoy SC-3 west of Ireland and missed the British steam merchant Empire Soldier (4539 grt), which had been slightly damaged in a collision some time before.
At 00.25 hours, the U-boat torpedoed and sank HMS Dundee (L 84) (Capt O.M.F. Stokes, RN (retired)), the only escort vessel of the convoy at that time. Six officers and six ratings were lost. The commander survived the sinking. Six survivors were picked up by Vigsnes, 20 respectively 41 by the Norwegian steam merchants Granfoss and Fido and the remaining men by HMS Wanderer (D 74) (Cdr J.H. Ruck-Keene, DSC, RN).