SM UB-115

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UB 148 at sea 2.jpeg
UB-148 at sea, a U-boat similar to UB-115.
History
War Ensign of Germany 1903-1918.svg German Empire
NameUB-115
Ordered6 / 8 February 1917 [1]
Builder Blohm & Voss, Hamburg
Cost3,714,000 German Papiermark
Yard number321
Launched4 November 1917 [2]
Commissioned28 May 1918 [2]
FateSunk 29 September 1918 by British warships and aircraft at 55°13′N1°22′W / 55.217°N 1.367°W / 55.217; -1.367 [2]
General characteristics [2]
Class and type Type UB III submarine
Displacement
  • 519  t (511 long tons) surfaced
  • 649 t (639 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. Reinhold Thomsen [3]
  • 28 May – 29 September 1918
Operations: 2 patrols
Victories: 1 merchant ship sunk
(336  GRT)

SM UB-115 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 28 May 1918 as SM UB-115. [Note 1] She was the only German submarine commissioned with the number 115.

Contents

UB-115 was sunk by British warships, including HMS Ouse and HMS Star, and the rigid airship R29 at 55°13′N1°22′W / 55.217°N 1.367°W / 55.217; -1.367 using depth charges and aerial bombs. [2]

Construction

She was built by Blohm & Voss of Hamburg and following just under a year of construction, launched at Hamburg on 4 November 1917. UB-115 was commissioned in the spring the next year under the command of Oblt.z.S. Reinhold Thomsen. Like all Type UB III submarines, UB-115 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-115 would carry a crew of up to 3 officers and 31 men and had a cruising range of 7,420 nautical miles (13,740 km; 8,540 mi). UB-115 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.

Fate

On 29 September 1918 while under the command of Reinhold Thomsen, UB-115 was engaged by armed trawlers (amongst others Viola), the airship R29, HMS Ouse and HMS Star. UB-115 was depth charged until destroyed and went down at position 55°14′46″N1°22′45″W / 55.24611°N 1.37917°W / 55.24611; -1.37917 (WGS84), about 4.5 nautical miles (8.3 km; 5.2 mi) northeast of Beacon Point, Newton-by-the-Sea, off Northumberland. All 39 men aboard the submarine died in the attack and sinking. [4] [5]

UB-115's wreck lies in two pieces and is covered in soft corals and an accretion formed from fly ash from a local power plant. [4]

Summary of raiding history

DateNameNationalityTonnage [Note 2] Fate [6]
21 September 1918 Staithes Civil Ensign of the United Kingdom.svg  United Kingdom 336Sunk

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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: Reinhold Thomsen". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 10 March 2015.
  4. 1 2 Helgason, Guðmundur. "WWI U-boat commanders: UB 115". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 29 September 2010.
  5. MHSC. "Viola-Dias, War, Distant Waters and the Hull Fishing Industry in Both World Wars" (PDF). MHSC Maritime Historical Studies Centre. University of Hull. Archived from the original (PDF) on 18 March 2009. Retrieved 3 March 2009.
  6. Helgason, Guðmundur. "Ships hit by UB 115". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 10 March 2015.

Bibliography