She was commissioned into the German Imperial Navy on 8 September 1917 as SM UB-80.

[Note 1] UB-80 was surrendered to Italy in accordance with the requirements of the Armistice with Germany on 26 November 1918 and broken up at La Spezia in May 1919.

UB-80 was commissioned later that same year under the command of Kptlt.

Like all Type UB III submarines, UB-80 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun.

UB-80 would carry a crew of up to 3 officer and 31 men and had a cruising range of 8,180 nautical miles (15,150 km; 9,410 mi).