This was a U-boat wolfpack operation, in tandem with ‘Tümmler’ (ii) and ‘Unverzagt’, in the Atlantic against the UGS.6 convoy (12/22 March 1943).
The wolfpack comprised U-67, U-103, U-109, U-159 and U-524, and for the loss of Kapitänleutnant Walter von Steinaecker’s U-524 sank one 8,062-ton ship.
Before the boats of the ‘Unverzagt’ and ‘Wohlgemut’ wolfpacks were able to establish patrol lines off the Azores islands group for the interception of a convoy located by the German navy’s B-Dienst signals interception and analysis group, Oberleutnant Siegfried Keller’s U-130 of the ‘Unverzagt’ wolfpack spotted and reported the UGS.6 convoy of 45 ships supported by Captain C. Wellborn’s US escort group (destroyers Wainwright, Champlin, Hobby, Mayrant, Rhind, Rowan and Trippe), but was quickly located and sunk by Champlin.
The calm weather made it difficult for the U-boats to make an undetected approach, but even so Steinaecker’s U-524 managed to make several attacks, that on 15 March being a daylight effort and sinking the 8,062-ton French Wyoming.
The arrival of potent Allied air cover over the convoy then persuaded the Germans to call off the effort on 19 March. U-524 was sunk by a Consolidated B-24 Liberator long-range patrol bomber of the USAAF’s 1st Anti-Submarine Squadron on 22 March.