SM UB-70

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UB 148 at sea 2.jpeg
UB-148 at sea, a U-boat similar to UB-70.
History
German Empire
Name: UB-70
Ordered: 20 May 1916[1]
Builder: Friedrich Krupp Germaniawerft, Kiel
Cost: 3,276,000 German Papiermark
Yard number: 288
Launched: 7 August 1917[2]
Commissioned: 12 October 1917[2]
Fate: lost in the Mediterranean 8 May 1918, reasons unknown[2]
General characteristics [2]
Class & type: German Type UB III submarine
Displacement:
  • 513 t (505 long tons) surfaced
  • 647 t (637 long tons) submerged
Length: 55.83 m (183 ft 2 in) (o/a)
Beam: 5.80 m (19.0 ft)
Draught: 3.67 m (12 ft 0 in)
Propulsion:
Speed:
  • 13.2 knots (24.4 km/h; 15.2 mph) surfaced
  • 7.6 knots (14.1 km/h; 8.7 mph) submerged
Range:
  • 9,090 nmi (16,830 km; 10,460 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:
Service record
Part of:
  • I Flotilla
  • Unknown – 5 May 1918
Commanders:
  • Kptlt. Johannes Remy[3]
  • 29 October 1917 – 5 May 1918
Operations: 2 patrols
Victories: 1 merchant ship sunk (1,794 GRT)

SM UB-70 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 29 October 1917 as SM UB-70.[Note 1]

UB-70 was serving in the Mediterranean when she was lost on 8 May 1918 for unknown reasons.[2]

Construction

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She was built by Friedrich Krupp Germaniawerft of Kiel and following just under a year of construction, launched at Kiel on 17 August 1917. UB-70 was commissioned later that same year under the command of Kptlt. Johannes Remy. Like all Type UB III submarines, UB-70 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-70 would carry a crew of up to 3 officer and 31 men and had a cruising range of 9,090 nautical miles (16,830 km; 10,460 mi). UB-70 had a displacement of 513 t (505 long tons) while surfaced and 647 t (637 long tons) when submerged. Her engines enabled her to travel at 13.2 knots (24.4 km/h; 15.2 mph) when surfaced and 7.6 knots (14.1 km/h; 8.7 mph) when submerged.

Summary of raiding history

Date Name Nationality Tonnage[Note 2] Fate[4]
2 May 1918 Valdivia  France 1,794 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. 28.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 Gröner 1991, pp. 25-30.
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Bibliography

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