The wolfpack Wohlgemut of 5 boats: U-67 (Korvkpt. Müller-Stöckheim), U-103 (Kptlt. Janssen), U-109 (Oblt. Schramm), U-159 (Kptlt. Witte), U-524 (Kptlt. Freiherr von Steinaecker) *

The wolfpack Tümmler of 6 boats: U-43 (Oblt. Schwantke), U-66 (Kptlt. Markworth), U-202 (Kptlt. Poser), U-504 (Kptlt. Luis), U-521 (Kptlt. Bargsten) *, U-558 (Kptlt. Krech) *

* U-boats that fired torpedo or used the deck gun

The same decode message that gives away the position of HX-229 to the BdU, also mentions the position of UGS-6.

After sending the sighting report, U-130 is sunk by the Champlin. On the 13th U-167, U-172 and U-513 make contact but are driven off. Only U-172 manages to sink a straggler.

The next day U-106, U-172 and U-513 come up but the escorts drive off all boats and damage the U-515 with depth charges. On the 15th U-159 and U-524 make daylight submerged attacks in which U-524 sinks one ship.

On the 16th there are 10 U-boats in contact with the convoy but all attacks are frustrated by the escorts. In the evening U-524 and U-172 make together an submerged attack in which several ships are missed and only one ship is sunk.

In the morning of the 17th U-558 has misses but in the evening U-167 damages one ship, which is finished off by U-521. On the 18th Liberator aircraft coming from bases in North Africa are providing air escort and although U-524 is still keeping contact the operation is broken off on the 19th.

The escorts were all equipped with 10 cm radar but had no HF/DF. In the very calm seas the radar proved to be very effective: even periscopes of submerged U-boats could be detected. The absence of HF/DF equipment made it impossible to interfere with the build-up of the U-boats around the convoy but the radar made it possible to repulse most of the boats in time, before they could attack.