SM UB-75

History
UB-148 at sea, a U-boat similar to UB-75.
German Empire
Name	UB-75
Ordered	23 September 1916^[2]
Builder	Blohm & Voss, Hamburg
Cost	3,338,000 German Papiermark
Yard number	304
Launched	5 May 1917^[1]
Commissioned	11 September 1917^[1]
Fate	Struck mine 10 December 1917 at 54°5′N 0°10′E / 54.083°N 0.167°E / 54.083; 0.167, all hands lost.^[1]
General characteristics ^[1]
Class and type	Type UB III submarine
Displacement	516 t (508 long tons) surfaced 648 t (638 long tons) submerged
Length	55.30 m (181 ft 5 in) (o/a)
Beam	5.80 m (19 ft)
Draught	3.68 m (12 ft 1 in)
Propulsion	2 × propeller shaft 2 × MAN four-stroke 6-cylinder diesel engines, 1,085 bhp (809 kW) 2 × Siemens-Schuckert electric motors, 780 shp (580 kW)
Speed	13.6 knots (25.2 km/h; 15.7 mph) surfaced 7.8 knots (14.4 km/h; 9.0 mph) submerged
Range	8,680 nmi (16,080 km; 9,990 mi) at 8 knots (15 km/h; 9.2 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^[1]
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 24 October – 10 December 1917
Commanders:	Oblt.z.S. Franz Walther^[3] 11 September – 10 December 1917
Operations:	2 patrols
Victories:	6 merchant ships sunk (10,777 GRT) 1 merchant ship damaged (1,477 GRT)

SM UB-75 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 11 September 1917 as SM UB-75.^{[Note 1]}

UB-75 was serving in the Flanders Flotillas. On 10 December 1917 she was lost with all hands after hitting a mine.^[1]

Construction

She was built by AG Vulcan of Hamburg and following just under a year of construction, launched at Hamburg on 5 May 1917. UB-75 was commissioned later that same year . Like all Type UB III submarines, UB-75 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-75 would carry a crew of up to 3 officer and 31 men and had a cruising range of 8,680 nautical miles (16,080 km; 9,990 mi). UB-75 had a displacement of 516 t (508 long tons) while surfaced and 648 t (638 long tons) when submerged. Her engines enabled her to travel at 13.6 knots (25.2 km/h; 15.7 mph) when surfaced and 7.8 knots (14.4 km/h; 9.0 mph) when submerged.

Summary of raiding history

Date	Name	Nationality	Tonnage^{[Note 2]}	Fate^[4]
4 November 1917	Lucida	United Kingdom	1,477	Damaged
9 November 1917	Frithjof Eide	Norway	1,207	Sunk
5 December 1917	Aigburth	United Kingdom	824	Sunk
6 December 1917	Leda	Netherlands	1,140	Sunk
7 December 1917	Highgate	United Kingdom	1,780	Sunk
8 December 1917	Lampada	United Kingdom	2,230	Sunk
9 December 1917	Venetia	United Kingdom	3,596	Sunk

References

Notes

^ "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

^ ^a ^b ^c ^d ^e ^f Gröner 1991, pp. 25–30.
^ Rössler 1979, p. 65.
^ Helgason, Guðmundur. "WWI U-boat commanders: Franz Walther". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 2015.
^ Helgason, Guðmundur. "Ships hit by UB 75". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 4 February 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.

External links

'UB-41 and UB-75, off Robin Hood's Bay: Marine Geophysical Survey report'
England project to research First World War Submarine wrecks^{[permanent dead link]}

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 December 1917
Shipwrecks	1 Dec: Washington 2 Dec: SM UB-81 6 Dec: USS Jacob Jones, Mont-Blanc, SM UC-69 7 Dec: CGS Simcoe 8 Dec: USS Rush 9 Dec: SM UB-18 10 Dec: SM UB-75, SMS Wien 12 Dec: USS Elizabeth, HMS Partridge, HMS Wolverine, Florida 13 Dec: SM U-75, HMS Stephen Furness 14 Dec: Châteaurenault, SM UC-38 17 Dec: USS F-1 18 Dec: Mariposa 19 Dec: SM UB-56 24 Dec: HMS Penshurst 25 Dec: Ajax, Espagne, SM U-87 30 Dec: HMT Aragon, HMS Attack 31 Dec: USS Fli-Hawk, Vigrid, HMS Osmanieh
Other incidents	6 Dec: Halifax Explosion, Imo, Stella Maris, SM U-96 17 Dec: USS F-3 Unknown date: HMS Carysfort
1916 1917 1918 November 1917 January 1918