 The U-boat pursued her, but lost her in rapidly worsening weather, abandoning the chase and returning to the patrol line.The next day, 11 October, reported sighting a convoy of three fast ships and three destroyers, "U-353" was one of several U-boats ordered to pursue them.The detached U-boats were designated wolfpack 'Leopard', but were soon ordered to change course to close a larger convoy spotted by wolfpack 'Wolf' about 400 miles to the west.