UB-148 at sea, a U-boat similar to UB-155.
History
German Empire
Name	UB-155
Ordered	27 June 1917[1]
Builder	AG Vulcan, Hamburg
Cost	4,301,000 German Papiermark
Yard number	120
Launched	26 October 1918[2]
Completed	26 February 1919[2]
Fate	Surrendered 9 March 1919, broken up[2]
General characteristics [2]
Class and type	Type UB III submarine
Displacement	539 t (530 long tons) surfaced 656 t (646 long tons) submerged
Length	55.52 m (182 ft 2 in) (o/a)
Beam	5.80 m (19 ft)
Draught	3.85 m (12 ft 8 in)
Propulsion	2 × propeller shaft 2 × MAN-Vulcan four-stroke 6-cylinder diesel engines, 1,085 bhp (809 kW) 2 × Siemens-Schuckert electric motors, 780 shp (580 kW)
Speed	13.5 knots (25.0 km/h; 15.5 mph) surfaced 7.5 knots (13.9 km/h; 8.6 mph) submerged
Range	7,120 nmi (13,190 km; 8,190 mi) at 6 knots (11 km/h; 6.9 mph) surfaced 50 nmi (93 km; 58 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth	50 m (160 ft)
Complement	3 officers, 31 men[2]
Armament	5 × 50 cm (19.7 in) torpedo tubes (4 bow, 1 stern) 10 torpedoes 1 × 8.8 cm (3.46 in) deck gun
Service record
Operations:	No patrols
Victories:	None

SM UB-155^{[Note 1]} was a German Type UB III submarine or U-boat built for the German Imperial Navy (German: Kaiserliche Marine) during World War I. She was never commissioned into the German Imperial Navy but surrendered to France on 9 March 1919 in accordance with the requirements of the Armistice with Germany and broken up at Brest in July 1921.^[2]

She was built by AG Vulcan of Hamburg and following just under a year of construction, launched at Hamburg on 26 October 1918. UB-155 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-155 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). UB-155 had a displacement of 539 t (530 long tons) while surfaced and 656 t (646 long tons) when submerged. Her engines enabled her to travel at 13.5 knots (25.0 km/h; 15.5 mph) when surfaced and 7.5 knots (13.9 km/h; 8.6 mph) when submerged.