Built as a submarine under yard No 321 by Blohm & Voss, Steinwerder near Hamburg for the Imperial German Navy.
06/08 February 1917 ordered.
04 November 1917 launched as the UB-115 as one of the German Type UB III class submarine. 96 boats were commissioned.
Displacement 519 ton surfaced, 649 ton submerged. Dim. 55.30 x 5.80 x 3.70m. (draught)
Powered by two MAN-Vulcan four-stroke 6-cyl. diesel engines, 1,085 bhp., twin shafts, speed 13.3 knots surfaced, 7.5 knots submerged.
Range 7,420 mile by a speed of 6 knots surfaced, 63 mile by a speed of 4 knots submerged.
Test depth 50 metres.
Armament: 5 – 500mm torpedo tubes, four bow one stern, carried 10 torpedoes. 1 - 8.8 cm deck gun.
28 May 1918 commissioned.
After completing a unit of the Flanders Flotilla based in Zeebrugge, Belgium.
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. She was the only German submarine commissioned with the number 115.
UB-115 was sunk by British warships, including HMS OUSE and HMS STAR and, and the rigid airship R29 at
55°13′N 1°22′W55.217°N 1.367°W using depth charges and aerial bombs.
Main article: German Type UB III submarine
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.
She made two war patrols between commission and loss in which she one British coaster the STAITHES of 336 gross ton sank with the loss of 4 crew members.
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″N 1°22′45″W55.24611°N 1.37917°W (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.
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.
South Georgia & Sandwich Islands 2015 £2.50 sgMS?, scott?
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