|Career (German Empire)|
|Ordered:||23 September 1913|
|Builder:||Blohm & Voss, Hamburg|
|Yard number:||Werk 313|
|Launched:||21 July 1917|
|Commissioned:||16 February 1918|
|Fate:||Sunk, July 28 – August 3, 1918|
|General characteristics |
|Class & type:||German Type UB III submarine|
|Displacement:||516 long tons (524 t) surfaced
651 long tons (661 t) submerged
|Length:||55.3 m (181 ft) o/a|
|Beam:||5.8 m (19 ft)|
|Draught:||3.7 m (12 ft)|
6-cylinder diesel engines, 1,100 hp (820 kW)
Siemens-Schuckert electric motors, 788 hp (588 kW)
|Speed:||13.5 knots (25.0 km/h; 15.5 mph) surfaced
7.5 knots (13.9 km/h; 8.6 mph) submerged
|Range:||8,500 mi (13,700 km) at 5 kn (9.3 km/h; 5.8 mph) surfaced
55 mi (89 km) at 4 kn (7.4 km/h; 4.6 mph) submerged
|Test depth:||50 m (160 ft)|
|Armament:||• 5 × torpedo tubes (4 bow, 1 stern)
• 10 × torpedoes
• 1 × 88 mm (3.5 in) deck gun
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. The U-boat was ordered on 23 September 1913 and launched on 21 July 1917. She was commissioned into the German Imperial Navy on 16 February 1918 as SM UB-107.[Note 1] The submarine sank 11 ships in 4 patrols.
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 by UB-104. 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).
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.
- "Type UB III boats". uboat.net. Retrieved 29 September 2010.
- "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.
- "UB 107". uboat.net. Retrieved 2009-10-05.
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