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.
UB-109 was sunk by mine in the English Channel on 29 August 1918 and underwater scanning of the area covered by the Dover Barrage shows her wreck broken in half.[1]
See main article: Type UB III submarine. 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 8.82NaN2 deck gun. UB-109 would carry a crew of up to 3 officer and 31 men and had a cruising range of 7420nmi. UB-109 had a displacement of 510lk=inNaNlk=in while surfaced and 629t when submerged. Her engines enabled her to travel at 13.3kn when surfaced and when submerged.
Date | Name | Nationality | Tonnage[2] | Fate[3] | |
---|---|---|---|---|---|
9 April 1918 | President Leroy-lallier | France | 1,320 | Sunk | |
10 April 1918 | Henley | United Kingdom | 3,249 | Sunk | |
13 April 1918 | Wilson | United Kingdom | 110 | Sunk | |
18 April 1918 | Runswick | United Kingdom | 3,060 | Sunk | |
19 August 1918 | Zinal | United Kingdom | 4,037 | Sunk | |
25 August 1918 | Pontet Canet | France | 1,183 | Sunk | |
26 August 1918 | Helge | Sweden | 1,133 | Sunk |