SM UB-75

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]

For other ships with the same name, see German submarine U-75.
UB-148 at sea, a U-boat similar to UB-75.
History
German Empire
NameUB-75
Ordered23 September 1916[1]
BuilderBlohm & Voss, Hamburg
Cost3,338,000 German Papiermark
Yard number304
Launched5 May 1917[2]
Commissioned11 September 1917[2]
FateStruck mine 10 December 1917 at 54°5′N 0°10′E, all hands lost.[2]
General characteristics [2]
Class and typeGerman Type UB III submarine
Displacement
  • 516 t (508 long tons) surfaced
  • 648 t (638 long tons) submerged
Length55.30 m (181 ft 5 in) (o/a)
Beam5.80 m (19 ft)
Draught3.68 m (12 ft 1 in)
Propulsion
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 depth50 m (160 ft)
Complement3 officers, 31 men[2]
Armament
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)

UB-75 was serving in the Flanders Flotillas. On 10 December 1917 she was lost with all hands after hitting a mine.[2]

Construction
Main article: German Type UB III submarine

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
  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. 65.
  2. Gröner 1991, pp. 25–30.
  3. 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.
  4. 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). U-Bootbau bis Ende des 1. Weltkrieges, Konstruktionen für das Ausland und die Jahre 1935 – 1945. ISBN 3-7637-5213-7. {{cite book}}: |work= ignored (help)

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