 The submarine was commissioned into the German Imperial Navy as SM UB-9 on 18 February 1915 under the command of Oberleutnant zur See Wilhelm Werner, a 26-year-old first-time U-boat commander. Wenninger was only in command of UB-9 for ten days. Sources do not indicate who, if anyone, succeeded him as commander of UB-9, or if UB-9 remained in commission.
