SM UB-122

For other ships with the same name, see German submarine U-122.
UB-148 at sea, a U-boat similar to UB-122.
History
German Empire
NameUB-122
Ordered6 / 8 February 1917[1]
BuilderAG Weser, Bremen
Cost3,654,000 German Papiermark
Yard number295
Laid down21 May 1917[2]
Launched2 February 1918[3]
Commissioned4 March 1918[3]
FateSurrendered 24 November 1918; scuttled English channel 1 July 1921
General characteristics [3]
Class and typeType UB III submarine
Displacement
  • 512 t (504 long tons) surfaced
  • 643 t (633 long tons) submerged
Length55.85 m (183 ft 3 in) (o/a)
Beam5.80 m (19 ft)
Draught3.72 m (12 ft 2 in)
Propulsion
Speed
  • 13.9 knots (25.7 km/h; 16.0 mph) surfaced
  • 7.6 knots (14.1 km/h; 8.7 mph) submerged
Range
  • 7,280 nmi (13,480 km; 8,380 mi) at 6 knots (11 km/h; 6.9 mph) surfaced
  • 55 nmi (102 km; 63 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth50 m (160 ft)
Complement3 officers, 31 men[3]
Armament
Service record
Part of:
  • III Flotilla
  • 7 July – 11 November 1918
Commanders:
  • Oblt.z.S. Alexander Magnus[4]
  • 4 March – 11 November 1918
Operations: 2 patrols
Victories: None

SM UB-122 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 4 March 1918 as SM UB-122.[Note 1]

UB-122 was surrendered to the Allies at Harwich on 20 November 1918 in accordance with the requirements of the Armistice with Germany. Having been exhibited at Southampton in December 1918, she was then laid up at Portsmouth until scuttled in the English Channel on 1 July 1921.[5]

Although contemporary Admiralty documents leave no room for doubt as to UB-122's fate, her name has become widely associated[6] with one of three submarine-wrecks in the Medway,[7][8] which another Admiralty document makes clear can only be one of UB-144, UB-145 or UB-150.[9]

  1. ^ Rössler 1979, p. 55.
  2. ^ Helgason, Guðmundur. "WWI U-boats: UB 122". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 13 February 2009.
  3. ^ a b c d Gröner 1991, pp. 25–30.
  4. ^ Helgason, Guðmundur. "WWI U-boat commanders: Alexander Magnus". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 10 March 2015.
  5. ^ Dodson, Aidan; Cant, Serena (2020). Spoils of War: the fate of enemy fleets after the two World Wars. Barnsley: Seaforth. pp. 54, 130. ISBN 978-1-5267-4198-1.
  6. ^ Ultimately connected with the wholly erroneous statement in Gröner 1991, page 29, that she "ran aground off the East Coast of Britain on the way to being broken up, 1921" - a fate that he wrongly attributes to a large number of other boats.
  7. ^ Wreck location shown on Google Maps https://maps.google.co.uk/maps?q=51.430667,0.631983&hl=en&ll=51.430636,0.632014&spn=0.000741,0.002382&sll=52.8382,-2.327815&sspn=5.88034,19.511719&t=h&z=19
  8. ^ "Historic wreckage of German First World War U-boat revealed in low tide". The Telegraph. London. 20 December 2013. Archived from the original on 20 January 2018. Retrieved 5 October 2020.
  9. ^ See Dodson and Cant, pages 100-101.


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