SM UB-31 [SEP] vessel class
SM UB-31
SM "UB-31" was a German Type UB II submarine or U-boat in the German Imperial Navy () during World War I. The U-boat was ordered on 22 July 1915 and launched on 16 November 1915. She was commissioned into the German Imperial Navy on 25 March 1916 as SM "UB-31".
The submarine sank 26 ships in 25 patrols. "UB-31" was depth charged and sunk by British warships , , and in the English Channel on 2 May 1918. Alternatively she may
sent all the materials, along with German shipyard workers, to Pola, where the boats were reassembled. "UB-43" was launched in early April 1916, while "UB-47" followed in June.
Class members.
Class members SM "U-43".
"UB-43" was ordered by the Imperial German Navy on 31 July 1915 and was laid down by AG Weser of Bremen on 3 September. While under construction, she was one of a group of six U-boats selected for service in the Mediterranean. "