SM UB-51

SM UB-51 was a German Type UB III submarine or U-boat in the German Imperial Navy (Kaiserliche Marine) during World War I. She was commissioned into the Pola Flotilla of the German Imperial Navy on 26 July 1917 as SM UB-51.

She operated as part of the Pola Flotilla based in Cattaro. UB-51 was surrendered 16 January 1919 with the remainder of the Pola Flotilla following orders by Admiral Reinhard Scheer to return to port. UB-51 was later broken up at Swansea.

Construction
UB-51 was ordered by the GIN on 20 May 1916. She was built by Blohm & Voss, Hamburg and following just under a year of construction, launched at Hamburg on 8 March 1917. UB-51 was commissioned later that same year. Like all Type UB III submarines, UB-51 carried 10 torpedoes and was armed with a 8.8 cm deck gun. UB-51 would carry a crew of up to 3 officer and 31 men and had a cruising range of 9,040 nmi. UB-51 had a displacement of 516 t while surfaced and 651 t when submerged. Her engines enabled her to travel at 13.6 kn when surfaced and 8 kn when submerged.