 The latter ship was taken in tow after being hit, but foundered west of Ushant on the 9th.These operations were conducted from the new submarine base at Saint-Nazaire in France, which provided type VII boats like "U-75" with a greater patrol range and cruising ability, thus conferring an essential advantage.The boat's fourth patrol was more unusual, requiring her to slip unnoticed through the heavily defended Strait of Gibraltar and into the Mediterranean to attack allied shipping operating from Gibraltar, Malta and Egypt.