 On 12 October she had seen just such a convoy and managed to sink two landing craft with gunfire before she escaped.Her final patrol was from 22 December 1941, and consisted of a similar sweep along the Libyan coast.On 28 December, six days since leaving Salamis, a small coastal convoy was spotted off Mersa Matruh, "U-75" launched an attack which sank the small British freighter .