U-115 may refer to one of the following German submarines:
Germany, officially the Federal Republic of Germany, is a country in Central and Western Europe, lying between the Baltic and North Seas to the north, and the Alps to the south. It borders Denmark to the north, Poland and the Czech Republic to the east, Austria and Switzerland to the south, France to the southwest, and Luxembourg, Belgium and the Netherlands to the west.
- SM U-115, the lead ship of the Type U 115 submarines; laid down during the First World War; unfinished at the end of the war; broken up incomplete; diesel engines used in SMS Gefion
- During the First World War, Germany also had this submarine with a similar name:
- SM UB-115, a Type UB III submarine ordered in 1917 and sunk 29 September 1918
SM UB-115 was a German Type UB III submarine or U-boat in the German Imperial Navy 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.
The Type UB III submarine was a class of U-boat built during World War I by the German Imperial Navy.
- During the First World War, Germany also had this submarine with a similar name:
- German submarine U-115 (1939), would have been a Type XIB submarine, a large cruiser submarine capable of carrying an Arado Ar 231 aircraft; laid down in 1939, but cancelled after the outbreak of the Second World War
SM U-115 was a German Type U 115 U-boat of the Imperial German Navy built at Schichau-Werke, Elbing. As her sister ship SM U-116, she was never completed and ultimately broken up in Danzig after the armistice. Her main engines were used in M/S Adolf Sommerfeld ex SMS Gefion. Both boats had been offered to the IGN free of charge by Schichau in an attempt to gain experience in building submarines. When construction of the two boats began to lag behind due to shortages in raw materials and lack of experience in submarine construction they were declared "war boats" (Kriegsboote), formally ordered by the Reichsmarineamt and given their respective designation. On 20 October 1918 Schichau-Werke reported U 115 would not be ready for delivery until the spring of 1919. Nevertheless 14 more boats of the class were ordered on 29 June 1918 for delivery in 1919.
World War I, also known as the First World War or the Great War, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918. Contemporaneously described as "the war to end all wars", it led to the mobilisation of more than 70 million military personnel, including 60 million Europeans, making it one of the largest wars in history. It is also one of the deadliest conflicts in history, with an estimated nine million combatants and seven million civilian deaths as a direct result of the war, while resulting genocides and the 1918 influenza pandemic caused another 50 to 100 million deaths worldwide.
SMS Gefion was an unprotected cruiser of the German Kaiserliche Marine, the last ship of the type built in Germany. She was laid down in March 1892, launched in March 1893, and completed in June 1895 after lengthy trials and repairs. The cruiser was named after the earlier sail frigate Gefion, which had been named for the goddess Gefjon of Norse mythology. Intended for service in the German colonial empire and as a fleet scout, Gefion was armed with a main battery of ten 10.5-centimeter (4.1 in) guns, had a top speed in excess of 19.5 knots, and could steam for 3,500 nautical miles, the longest range of any German warship at the time. Nevertheless, the conflicting requirements necessary for a fleet scout and an overseas cruiser produced an unsuccessful design, and Gefion was rapidly replaced in both roles by the newer Gazelle class of light cruisers.
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