SM UB-74 was a German Type UB III submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. She was commissioned into the German Imperial Navy on 24 October 1917 as SM UB-74.^{[Note 1]}

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UB-148 at sea, a U-boat similar to UB-74.
History
German Empire
Name	UB-74
Ordered	23 September 1916[1]
Builder	AG Vulcan, Hamburg
Cost	3,337,000 German Papiermark
Yard number	98
Launched	12 September 1917[2]
Commissioned	24 October 1917[2]
Fate	Sunk 26 May 1918 by depth charges at 50°32′N 2°32′W.[2]
General characteristics [2]
Class and type	German Type UB III submarine
Displacement	508 t (500 long tons) surfaced 639 t (629 long tons) submerged
Length	55.52 m (182 ft 2 in) (o/a)
Beam	5.76 m (18 ft 11 in)
Draught	3.70 m (12 ft 2 in)
Propulsion	2 × propeller shaft 2 × Körting four-stroke 6-cylinder diesel engines, 1,050 bhp (780 kW) 2 × Siemens-Schuckert electric motors, 780 shp (580 kW)
Speed	13.4 knots (24.8 km/h; 15.4 mph) surfaced 7.5 knots (13.9 km/h; 8.6 mph) submerged
Range	8,420 nmi (15,590 km; 9,690 mi) at 6 knots (11 km/h; 6.9 mph) surfaced 55 nmi (102 km; 63 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
Part of:	V Flotilla 6 – 25 January 1918 Flandern I Flotilla 25 January – 26 May 1918
Commanders:	Kptlt. Karl Neureuther 24 October 1917 – 30 January 1918 Oblt.z.S. Ernst Steindorff 31 January – 26 May 1918
Operations:	4 patrols
Victories:	7 merchant ships sunk (13,294 GRT) 3 merchant ships damaged (12,817 GRT)

Close

UB-74 was serving in the Flanders Flotillas. On 26 May 1918 she was sunk by HMS Lorna with depth charges in the English channel.^[2]

She was built by AG Vulcan of Hamburg and following just under a year of construction, launched at Hamburg on 12 September 1917. UB-74 was commissioned later that same year under the command of Kptlt. Karl Neureuther. Like all Type UB III submarines, UB-74 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-74 would carry a crew of up to 3 officer and 31 men and had a cruising range of 8,420 nautical miles (15,590 km; 9,690 mi). UB-74 had a displacement of 508 t (500 long tons) while surfaced and 639 t (629 long tons) when submerged. Her engines enabled her to travel at 13.4 knots (24.8 km/h; 15.4 mph) when surfaced and 7.5 knots (13.9 km/h; 8.6 mph) when submerged.