|Ordered:||6/8 February 191723 September 1913|
|Builder:||Blohm & Voss, Hamburg|
|Cost:||3,714,000 German Papiermark|
|Launched:||21 July 1917|
|Commissioned:||16 February 1918|
|Fate:||sunk 27 July 1918 by British warships at Coordinates: .|
|General characteristics |
|Class and type:||German Type UB III submarine|
|Length:||55.30 m (181 ft 5 in) (o/a)|
|Beam:||5.80 m (19 ft)|
|Draught:||3.70 m (12 ft 2 in)|
|Test depth:||50 m (160 ft)|
|Complement:||3 officers, 31 men|
SM UB-107 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 16 February 1918 as SM UB-107.[Note 1]
UB-107 was ordered by the GIN on 23 September 1916. She was built by Blohm & Voss of Hamburg and following just under a year of construction, launched at Hamburg on 21 July 1917. UB-107 was commissioned early the next year . Like all Type UB III submarines, UB-107 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-107 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-107 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.
The first recorded fate of UB-107 was noted as sunk by depth charge on July 27, 1918 by the Royal Navy trawler Calvis and HMY Vanessa II at position . It has since been argued that the UB-107 was probably not present for the attack by Calvis and Vanessa II as it was the only U-boat that could have been responsible for the sinking of steamers Chloris and John Rettig two and a half hours later at position .
In 1985 divers discovered the wreck of UB-107 one mile north of Flamborough Head at position entangled with another wreck, the SS Malvina, a British steamer torpedoed and sunk on 3 August 1918 reported as being by UB-104, though UB-104's record says it was not in the area nor that it attacked a ship on that day. UB-107 was identified by the markings on her propellers. It is suggested that either UB-107 suffered an accident of some sort or was lost on a British mine between July 28 and August 3, 1918 leaving all hands lost (38 dead).
Summary of raiding history
|10 May 1918||Erich Lea||Norway||1,630||Sunk|
|10 May 1918||Naparima||Sweden||1,685||Damaged|
|6 June 1918||Koningin Regentes||Netherlands||1,970||Sunk|
|8 June 1918||Hogarth||United Kingdom||1,231||Sunk|
|13 June 1918||Agnes||Sweden||1,334||Sunk|
|13 June 1918||Kalo||United Kingdom||1,957||Sunk|
|15 June 1918||Kieldrecht||United Kingdom||1,284||Sunk|
|8 July 1918||Chicago||United Kingdom||7,709||Sunk|
|8 July 1918||War Crocus||United Kingdom||5,296||Sunk|
|9 July 1918||Fryken||Sweden||943||Sunk|
|27 July 1918||Chloris||United Kingdom||984||Sunk|
|27 July 1918||John Rettig||Sweden||1,809||Sunk|
The fate of UB-107 was the subject of an episode of the documentary television series Deep Sea Detectives: "Mystery U-Boat of WWI". The documentary offered various scenarios for the sinking based on historical evidence and exploratory diving at the wreck site.
- "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.
- Tonnages are in gross register tons
- Rössler 1979, p. 66.
- Gröner 1991, pp. 25-30.
- Helgason, Guðmundur. "WWI U-boats: UB 107". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 8 December 2014.
- "UB-107 (Wreck)". wikimapia.org. Retrieved 2009-10-07.
- "100 Best Wreck Dives THE MALVINA AND UB-107 – 49". divernet.com. Retrieved 2009-10-07.
- Helgason, Guðmundur. "Ships hit by UB 107". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 8 December 2014.
- 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; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
- 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.