She was commissioned into the German Imperial Navy on 8 August 1918 as SM UB-98.

[Note 1] UB-98 was surrendered on 21 November 1918 and broken up in Porthmadog in 1922.

[2] Reportedly, the steel plates of the submarine were used to line Garnedd Tunnel on the Ffestiniog Railway, but this has never been proven.

Like all Type UB III submarines, UB-98 carried 10 torpedoes and was armed with a 10.5 cm (4.13 in) deck gun.

UB-98 would carry a crew of up to 3 officer and 31 men and had a cruising range of 7,120 nautical miles (13,190 km; 8,190 mi).