SM UB-40

SM UB-40 was a German Type UB II submarine or U-boat in the German Imperial Navy (Kaiserliche Marine) during World War I. The U-boat was ordered on 22 July 1915 and launched on 25 April 1916. She was commissioned into the German Imperial Navy on 17 August 1916 as SM UB-40.

The submarine sank 100 ships in 28 patrols. UB-40 was scuttled in Ostende when the German army retreated from Belgium on 5 October 1918.

The wreck of UB-40 is located & identified by divers in the recent years.