SM UB-41 was a German Type UB II submarine or U-boat in the German Imperial Navy during World War I.
SM UB-45 a U-boat similar to UB-41
German Type UB II submarine
The UB II type submarine was a class of U-boat built during World War I by the German Imperial Navy. They were enlarged from the preceding type UB I and were more effective vessels. The boats were a single hull design with a 50-metre maximum diving depth and a 30-45 second diving time. In 1915 and 1916, 30 were built at two different shipyards.
SM UB-45