SM UB-108

For other ships with the same name, see German submarine U-108.

UB-148 at sea, a U-boat similar to UB-108.
History
German Empire
Name	UB-108
Ordered	6 / 8 February 1917 [1]
Builder	Blohm & Voss, Hamburg
Cost	3,714,000 German Papiermark
Yard number	314
Launched	21 July 1917 [2]
Commissioned	1 March 1918 [2]
Fate	Lost July 1918 in the English Channel. [2]
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 × Siemens-Schuckert 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 I Flotilla 22 May – 2 July 1918
Commanders:	Oblt.z.S. Wilhelm Amberger [3] 1 March – 2 July 1918
Operations:	3 patrols
Victories:	2 merchant ships sunk (2,655  GRT)

SM UB-108 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 1 March 1918 as SM UB-108. ^{[Note 1]}

UB-108 was lost in July 1918 in the English Channel. ^[2]

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 21 July 1917. UB-108 was commissioned early the next year under the command of Oblt.z.S. Wilhelm Amberger. Like all Type UB III submarines, UB-108 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-108 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-108 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 [4]
7 June 1918	Diana	United Kingdom	1,119	Sunk
12 June 1918	Kennington	United Kingdom	1,536	Sunk

References

Notes

1. "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.
2. Tonnages are in gross register tons

Citations

1. Rössler 1979, p. 66.
2. Gröner 1991, pp. 25–30.
3. Helgason, Guðmundur. "WWI U-boat commanders: Wilhelm Amberger". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 9 March 2015.
4. Helgason, Guðmundur. "Ships hit by UB 108". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 9 March 2015.

Bibliography

• Bendert, Harald (2000). Die UB-Boote der Kaiserlichen Marine, 1914-1918. Einsätze, Erfolge, Schicksal (in German). Hamburg: Verlag E.S. Mittler & Sohn GmbH. ISBN   3-8132-0713-7.
• Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN   0-85177-593-4.
• Rössler, Eberhard (1979). Die deutschen U-Boote und ihre Werften: eine Bilddokumentation über den deutschen U-Bootbau; in zwei Bänden (in German). Vol. I. Munich: Bernard & Graefe. ISBN   3-7637-5213-7.