SM UB-128

SM UB-128 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 German Imperial Navy on 11 May 1918 as SM UB-128.

UB-128 was surrendered on 3 February 1919 in accordance with the requirements of the Armistice with Germany and broken up in Falmouth in 1921.

Construction
She was built by AG Weser of Bremen and following just under a year of construction, launched at Bremen on 10 April 1918. UB-128 was commissioned later the same year. Like all Type UB III submarines, UB-128 carried 10 torpedoes and was armed with a 10.5 cm deck gun. UB-128 would carry a crew of up to 3 officer and 31 men and had a cruising range of 7280 nmi. UB-128 had a displacement of 512 t while surfaced and 643 t when submerged. Her engines enabled her to travel at 13.9 kn when surfaced and 7.6 kn when submerged.