SM UB-91 was a German Type UB III submarine or U-boat in the German Imperial Navy () during World War I. She was commissioned into the German Imperial Navy on 11 April 1918 as SM UB-91.
SM UB-91 was a German Type UB III submarine or U-boat in the German Imperial Navy () during World War I. She was commissioned into the German Imperial Navy on 11 April 1918 as SM UB-91.
SM UB-91 was a German Type UB III submarine or U-boat in the German Imperial Navy () during World War I. She was commissioned into the German Imperial Navy on 11 April 1918 as SM UB-91.