The convoy reached a position off St Nazaire at 21:00 and changed course toward the estuary, leaving "Atherstone" and "Tynedale" as a sea patrol. The convoy adopted a new formation with the MGB and two torpedo MLs in the lead, followed by "Campbeltown". The rest of the MLs formed two columns on either side and astern of the destroyer, with the MTB bringing up the rear. The first casualty of the raid was "ML 341", which had developed engine trouble and was abandoned. At 22:00 the submarine "Sturgeon" directed her navigation beacon out to sea to guide the convoy in. At about the same time "Campbeltown" raised the German naval ensign in an attempt to deceive any German lookouts into thinking she was a German destroyer.