UB-148 at sea, a U-boat similar to UB-115.
|Ordered:||6/8 February 1917|
|Builder:||Blohm & Voss, Hamburg|
|Cost:||3,714,000 German Papiermark|
|Launched:||4 November 1917|
|Commissioned:||28 May 1918|
|Fate:||Sunk 29 September 1918 by British warships and aircraft at Coordinates: .|
|General characteristics |
|Class & type:||German Type UB III submarine|
|Length:||55.30 m (181 ft 5 in) (o/a)|
|Beam:||5.80 m (19.0 ft)|
|Draught:||3.70 m (12 ft 2 in)|
|Test depth:||50 m (160 ft)|
|Complement:||3 officers, 31 men|
|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.[nb 1] She was the only German submarine commissioned with the number 115.
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 officer 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.
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 (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.
Summary of raiding career
|21 September 1918||Staithes||United Kingdom||336||Sunk|
- "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.
- Rössler 1979, p. 66.
- Gröner 1985, p. 55.
- Gröner 1985, pp. 52-53.
- Gröner 1985, p. 53.
- Helgason, Guðmundur. "Reinhold Thomsen". German and Austrian U-Boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 10 March 2015.
- Helgason, Guðmundur. "UB-115". German and Austrian U-Boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 29 September 2010.
- MHSC. "Viola-Dias, War, Distant Waters and the Hull Fishing Industry in Both World Wars" (PDF). MHSC Maritime Historical Studies Centre. University of Hull. Retrieved 3 March 2009.
- Helgason, Guðmundur. "Ships hit by UB-115". German and Austrian U-Boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 10 March 2015.
- 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 (1985). U-Boote, Hilfskreuzer, Minenschiffe, Netzleger, Sperrbrecher. Die deutschen Kriegsschiffe, 1815-1945 (in German) III (Koblenz: Bernard & Graefe). ISBN 3-7637-4802-4.
- Rössler, Eberhard (1979). U-Bootbau bis Ende des 1. Weltkrieges, Konstruktionen für das Ausland und die Jahre 1935 - 1945. Die deutschen U-Boote und ihre Werften (in German) I (Munich: Bernard & Graefe). ISBN 3-7637-5213-7.
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