SM UB-112

For other ships with the same name, see German submarine U-112.

SM UB-112 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 16 April 1918 as SM UB-112.^{[Note 1]}

UB-148 at sea, a U-boat similar to UB-112.
History
German Empire
Name	UB-112
Ordered	6 / 8 February 1917[1]
Builder	Blohm & Voss, Hamburg
Cost	3,714,000 German Papiermark
Yard number	318
Launched	15 September 1917[2]
Commissioned	16 April 1918[2]
Fate	Surrendered 24 November 1918; used for explosive trials and dumped on beach 1920; sold for scrap 1921
General characteristics [2]
Class and type	Type UB III submarine
Displacement	519 t (511 long tons) surfaced 649 t (639 long tons) submerged
Length	55.30 m (181 ft 5 in) (o/a)
Beam	5.80 m (19 ft)
Draught	3.70 m (12 ft 2 in)
Propulsion	2 × propeller shaft 2 × MAN-Vulcan four-stroke 6-cylinder diesel engines, 1,085 bhp (809 kW) 2 × Maffei electric motors, 780 shp (580 kW)
Speed	13.3 knots (24.6 km/h; 15.3 mph) surfaced 7.5 knots (13.9 km/h; 8.6 mph) submerged
Range	7,420 nmi (13,740 km; 8,540 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:	Flandern II Flotilla 21 July – 18 October 1918 III Flotilla 18 October – 11 November 1918
Commanders:	Kptlt. Wilhelm Rhein[3] 16 April – 11 November 1918
Operations:	3 patrols
Victories:	11 merchant ships sunk (10,459 GRT) 1 merchant ship damaged (1,960 GRT)

UB-112 was surrendered to the Allies at Harwich on 24 November 1918 in accordance with the requirements of the Armistice with Germany; she was used for explosives trials off Falmouth on 20 November and 1 December 1920, after which the boat was dumped on Castle Beach. The wreck was sold for scrap to R. Roskelly & Rodgers on 19 April 1921 for £125, but remains survive in situ.^[4]

Construction

Main article: Type UB III submarine

She was built by Blohm & Voss of Hamburg and following just under a year of construction, launched at Hamburg on 15 September 1917. UB-112 was commissioned in the spring the next year under the command of Kptlt. Wilhelm Rhein. Like all Type UB III submarines, UB-112 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-112 would carry a crew of up to 3 officer and 31 men and had a cruising range of 7,420 nautical miles (13,740 km; 8,540 mi). UB-112 had a displacement of 519 t (511 long tons) while surfaced and 649 t (639 long tons) when submerged. Her engines enabled her to travel at 13.3 knots (24.6 km/h; 15.3 mph) when surfaced and 7.4 knots (13.7 km/h; 8.5 mph) when submerged.

Summary of raiding history

Date	Name	Nationality	Tonnage[Note 2]	Fate[5]
21 August 1918	The Stewart’s Court	United Kingdom	813	Sunk
22 August 1918	Prunelle	United Kingdom	579	Sunk
23 August 1918	Heros	Sweden	351	Sunk
30 September 1918	Atlantico	Portugal	319	Sunk
1 October 1918	Aldebaran	Sweden	1,683	Sunk
1 October 1918	Gjertrud	Norway	593	Sunk
2 October 1918	Bamse	United Kingdom	1,001	Sunk
2 October 1918	Poljames	United Kingdom	856	Sunk
3 October 1918	Atlantis	Norway	1,171	Sunk
3 October 1918	Westwood	United Kingdom	1,968	Sunk
3 October 1918	A.E. Mc Kinstry	Canada	1,960	Damaged
4 October 1918	Nanna	Norway	1,125	Sunk