SM U-121

SM U-121[Note 1] was a Type UE II long-range minelaying U-boat of the Imperial German Navy intended for service in the Mediterranean. The Austro-Hungarian Navy allocated her the number SM U-84. She was built at Hamburg, Germany, by Aktiengesellschaft Vulcan and launched on 20 September 1918. Incomplete at the Armistice she was never commissioned in the Imperial German Navy but surrendered to the Allies at Harwich on 9 March 1919. Handed over to France, she was sunk as a gunnery target off Cherbourg on 1 July 1921.[2]

For other ships with the same name, see German submarine U-121.
History
German Empire
Name: U-121
Builder: AG Vulcan, Hamburg
Cost: 6,177,000 Goldmark
Yard number: 95
Launched: 20 September 1918
In service: 9 March 1919
Fate:
  • Surrendered on 9 March 1919 to France
  • Sunk as target off Cherbourg, 1 July 1921
General characteristics [1]
Class and type: German Type UE II submarine
Type: Coastal minelaying submarine
Displacement:
  • 1,164 t (1,146 long tons) surfaced
  • 1,512 t (1,488 long tons) submerged
Length: 81.52 m (267 ft 5 in) (o/a)
Beam: 7.42 m (24 ft 4 in)
Height: 10.16 m (33 ft 4 in)
Draught: 4.22 m (13 ft 10 in)
Installed power:
Propulsion: 2 shafts, 2 × 1.61 m (5 ft 3 in) propellers
Speed:
  • 14.7 knots (27.2 km/h; 16.9 mph) surfaced
  • 7 knots (13 km/h; 8.1 mph) submerged
Range:
  • 13,900 nmi (25,700 km; 16,000 mi) at 8 knots (15 km/h; 9.2 mph) surfaced
  • 35 nmi (65 km; 40 mi) at 4.5 knots (8.3 km/h; 5.2 mph) submerged
Test depth: 75 m (246 ft)
Complement: 4 officers, 36 enlisted
Armament:

References

Notes
  1. "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.

Citations
  1. Gröner 1991, p. 15.
  2. Dodson, Aidan; Cant, Serena (2020). Spoils of War: the fate of enemy fleets after the two World Wars. Barnsley: Seaforth. p. 125. ISBN 978 1 5267 4198 1.

Bibliography
  • 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.

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