SM UB-108

	UB-148 at sea, a U-boat similar to UB-108.
History
German Empire
Name	UB-108
Ordered	6 / 8 February 1917
Builder	Blohm & Voss, Hamburg
Cost	3,714,000 German Papiermark
Yard number	314
Launched	21 July 1917
Commissioned	1 March 1918
Fate	Lost July 1918 in the English Channel.
General characteristics
Class and type	German 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
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; 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.^[1]

Construction[edit]

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[edit]

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[edit]

Notes[edit]

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

Citations[edit]

^ ^a ^b ^c ^d ^e ^f Gröner 1991, pp. 25–30.
^ Rössler 1979, p. 66.
^ 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.
^ 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[edit]

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.

[4] "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.

[tonnage-5] Tonnages are in gross register tons

[FOOTNOTEGröner199125–30-1] ^ ^a ^b ^c ^d ^e ^f Gröner 1991, pp. 25–30.

[FOOTNOTERössler197966-2] Rössler 1979, p. 66.

[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.

[6] Helgason, Guðmundur. "Ships hit by UB 108". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 9 March 2015.

[2]

[1]

[3]

[Note 1]

[Note 2]

[4]

v t e German Type UB III submarines
SM UB-48 SM UB-49 SM UB-50 SM UB-51 SM UB-52 SM UB-53 SM UB-54 SM UB-55 SM UB-56 SM UB-57 SM UB-58 SM UB-59 SM UB-60 SM UB-61 SM UB-62 SM UB-63 SM UB-64 SM UB-65 SM UB-66 SM UB-67 SM UB-68 SM UB-69 SM UB-70 SM UB-71 SM UB-72 SM UB-73 SM UB-74 SM UB-75 SM UB-76 SM UB-77 SM UB-78 SM UB-79 SM UB-80 SM UB-81 SM UB-82 SM UB-83 SM UB-84 SM UB-85 SM UB-86 SM UB-87 SM UB-88 SM UB-89 SM UB-90 SM UB-91 SM UB-92 SM UB-93 SM UB-94 SM UB-95 SM UB-96 SM UB-97 SM UB-98 SM UB-99 SM UB-100 SM UB-101 SM UB-102 SM UB-103 SM UB-104 SM UB-105 SM UB-106 SM UB-107 SM UB-108 SM UB-109 SM UB-110 SM UB-111 SM UB-112 SM UB-113 SM UB-114 SM UB-115 SM UB-116 SM UB-117 SM UB-118 SM UB-119 SM UB-120 SM UB-121 SM UB-122 SM UB-123 SM UB-124 SM UB-125 SM UB-126 SM UB-127 SM UB-128 SM UB-129 SM UB-130 SM UB-131 SM UB-132 SM UB-133 SM UB-136 SM UB-142 SM UB-143 SM UB-144 SM UB-145 SM UB-148 SM UB-149 SM UB-150 SM UB-154 SM UB-155
Preceded by: Type UB II Followed by: Type VII (World War II)
List of U-boats of Germany

v t e Shipwrecks and maritime incidents in July 1918
Shipwrecks	2 Jul: USS Covington 4 Jul: SM U-20 5 Jul: Columbia 12 Jul: Kawachi 14 Jul: SM UC-77, Djemnah, Waitemata 17 Jul: Carpathia 19 Jul: Australien, USS San Diego, SM UB-110 20 Jul: HMS E34, Justicia, SM UB-124 24 Jul: HMS Pincher Unknown date: USS Oosterdijk, SM UB-65, SM UB-108
Other incidents	1 Jul: USS Covington 6 Jul: HMS C25 19 Jul: Justicia 23 Jul: HMT Boorara, Minnekahda, USS N-3, USS Preble Unknown date: San Jacinto
1917 1918 1919 June 1918 August 1918