The six U-boats that were to form the Wolf Pack 'Hai' (= 'shark') left their respective bases in France to rendezvous in a position south of the Canary Islands where they met on July 8, 1942. Even before U-201 reached the rendezvous, she had encountered and sunk SS Avila Star. The Pack was formed specifically to attack Convoy OS.33 was given an operational area CF-DG/DH-DT-ES/ET. Stores and provisions were transferred from the Type XB, U-boat U-116, and the pack then waited for the arrival of Convoy OS.33. The tactic employed by the Wolf Pack was for the U-boats to spread out in a line across the expected path of the convoy and await it's arrival. The first U-boat to sight the convoy would radio a report to U-boat headquarters giving position, number of escorts etc. and would then shadow the convoy giving hourly radio reports to allow the rest of the pack to close in. During the hours of darkness, the U-boats would surface, relying on their low profile to escape detection. When the attack actually began, each commander would be left to decide his own tactics. However, unlike earlier OS convoys, Convoy OS.33 was to be adequately escorted for the complete journey from Liverpool to Freetown and the U-boats were forced to wait until vessels were detached from the convoy and proceeding independently before they were able to attack unhindered. Six vessels from the convoy were lost in this way. After shadowing the convoy for fourteen days all the way to Freetown, the Wolf Pack was dissolved on July 21, 1942 and the U-boats then acted independently, until their patrols were over, sinking a further eight vessels. The chronological chart below shows the results of each U-boat on this particular patrol.