SM UB-107 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 16 February 1918 as SM UB-107.
The submarine conducted 4 patrols and sank 11 ships during the war for a total loss of . UB-107 was sunk on 27 July 1918 by and HMT Calvis at .
Construction
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 deck gun. UB-107 would carry a crew of up to 3 officer and 31 men and had a cruising range of . UB-107 had a displacement of while surfaced and when submerged. Her engines enabled her to travel at when surfaced and when submerged.
Fate The first recorded fate of UB-107 was noted as sunk by depth charge on 27 July 1918 by the Royal Navy trawler Calvia and destroyer Vanessa at position .Kemp p.53 It has since been argued that the UB-107 was probably not present for the attack by Calvis and Vanessa 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 .UB 107 at uboat.net; retrieved 28 October 2021
In 1985 divers discovered the wreck of UB-107 one mile north of Flamborough Head at position entangled with another wreck, the , a British steamer torpedoed and sunk on 3 August 1918 reported as being by , 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 28 July and 3 August 1918, leaving all hands lost (38 dead).
Summary of raiding history DateNameNationalityTonnageTonnages are in gross register tonsFate10 May 1918Erich Lea1,630Sunk10 May 1918Naparima1,685Damaged6 June 1918Koningin Regentes1,970Sunk8 June 1918Hogarth1,231Sunk13 June 1918Agnes1,334Sunk13 June 1918Kalo1,957Sunk15 June 1918Kieldrecht1,284Sunk8 July 1918Chicago7,709Sunk8 July 1918War Crocus5,296Sunk9 July 1918Fryken943Sunk27 July 1918Chloris984Sunk27 July 1918John Rettig1,809Sunk
Television Documentary 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.
References
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Citations
Bibliography
External links MaritimeQuest Daily Event SMS UB-107