SM UB-109

Last updated
UB 148 at sea 2.jpeg
UB-148 at sea, a U-boat similar to UB-109.
History
War Ensign of Germany 1903-1918.svg German Empire
NameUB-109
Ordered6 / 8 February 1917 [1]
Builder Blohm & Voss, Hamburg
Cost3,714,000 German Papiermark
Yard number315
Launched7 July 1917 [2]
Commissioned31 December 1917 [2]
FateSunk by mine on 29 August 1918 at 51°3′N1°44′E / 51.050°N 1.733°E / 51.050; 1.733 [2]
General characteristics [2]
Class and type German Type UB III submarine
Displacement
  • 510  t (500 long tons) surfaced
  • 629 t (619 long tons) submerged
Length55.30 m (181 ft 5 in) (o/a)
Beam5.80 m (19 ft)
Draught3.70 m (12 ft 2 in)
Propulsion
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 depth50 m (160 ft)
Complement3 officers, 31 men [2]
Armament
Service record
Part of:
Commanders:
  • Oblt.z.S. / Kptlt. Kurt Ramien [3]
  • 31 December 1917 – 29 August 1918
Operations: 3 patrols
Victories: 7 merchant ships sunk
(14,092  GRT)

SM UB-109 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 31 December 1917 as SM UB-109. [Note 1]

Contents

UB-109 was sunk by mine in the English Channel on 29 August 1918 [2] and underwater scanning of the area covered by the Dover Barrage shows her wreck broken in half. [4]

Construction

She was built by Blohm & Voss of Hamburg and following just under a year of construction, launched at Hamburg on 7 July 1917. UB-109 was commissioned later the same year under the command of Oblt.z.S. Kurt Ramien. Like all Type UB III submarines, UB-109 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-109 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-109 had a displacement of 510  t (500 long tons) while surfaced and 629 t (619 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

DateNameNationalityTonnage [Note 2] Fate [5]
9 April 1918 President Leroy-lallier Flag of France.svg  France 1,320Sunk
10 April 1918 Henley Civil Ensign of the United Kingdom.svg  United Kingdom 3,249Sunk
13 April 1918 Wilson Civil Ensign of the United Kingdom.svg  United Kingdom 110Sunk
18 April 1918 Runswick Civil Ensign of the United Kingdom.svg  United Kingdom 3,060Sunk
19 August 1918 Zinal Civil Ensign of the United Kingdom.svg  United Kingdom 4,037Sunk
25 August 1918 Pontet Canet Flag of France.svg  France 1,183Sunk
26 August 1918 Helge Flag of Sweden.svg  Sweden 1,133Sunk

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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. 1 2 3 4 5 6 Gröner 1991, pp. 25–30.
  3. ↑ Helgason, Guðmundur. "WWI U-boat commanders: Kurt Ramien (Royal House Order of Hohenzollern)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 9 March 2015.
  4. ↑ "The Maritime Archaeology of the Dover Barrage". Wessex archaeology on line. Retrieved 1 September 2015.
  5. ↑ Helgason, Guðmundur. "Ships hit by UB 109". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 9 March 2015.

Bibliography

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