SM UB-128

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For other ships of the same name, see German submarine U-128.
UB 148 at sea 2.jpeg
UB-148 at sea, a U-boat similar to UB-128.
Career (German Empire)
Name: UB-128
Ordered: 6/8 February 1917[1]
Builder: AG Weser, Bremen
Cost: 3,654,000 German Papiermark
Yard number: 301
Launched: 10 April 1918[2]
Commissioned: 11 May 1918[2]
Fate: Surrendered 3 February 1919.[2]
General characteristics [3]
Class and type: German Type UB III submarine
Displacement: 512 t (504 long tons) surfaced
643 t (633 long tons) submerged
Length: 55.85 m (183 ft 3 in) (o/a)
Beam: 5.8 m (19 ft)
Draught: 3.72 m (12 ft 2 in)
Propulsion: 2 × propeller shaft
2 × Benz four-stroke 6-cylinder diesel engines, 1,050 bhp (780 kW)
2 × Schiffsunion electric motors, 780 shp (580 kW)
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 depth: 50 m (160 ft)
Complement: 3 officers, 31 men[4]
Armament:
Service record
Part of: Mittelmeer I Flotilla
4 September - 11 November 1918
Commanders: Kptlt. Wilhelm Canaris[5]
11 May – 29 November 1918
Operations: 2 patrols
Victories: 1 merchant ship sunk (7,418 GRT)

SM UB-128 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 11 May 1918 as SM UB-128.[nb 1]

UB-128 was surrendered on 3 February 1919 in accordance with the requirements of the Armistice with Germany and broken up in Falmouth in 1921.[2]

Construction[edit]

She was built by AG Weser of Bremen and following just under a year of construction, launched at Bremen on 10 April 1918. UB-128 was commissioned later the same year under the command of Kptlt. Wilhelm Canaris. Like all Type UB III submarines, UB-128 carried 10 torpedoes and was armed with a 10.5 cm (4.13 in) deck gun. UB-128 would carry a crew of up to 3 officer and 31 men and had a cruising range of 7,280 nautical miles (13,480 km; 8,380 mi). UB-128 had a displacement of 512 t (504 long tons) while surfaced and 643 t (633 long tons) when submerged. Her engines enabled her to travel at 13.9 knots (25.7 km/h; 16.0 mph) when surfaced and 7.6 knots (14.1 km/h; 8.7 mph) when submerged.

Summary of Raiding Career[edit]

Date Name Nationality Tonnage
(GRT)
Fate[6]
21 August 1918 Champlain  France 7,418 Sunk

Notes[edit]

  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.

References[edit]

  1. ^ Rössler 1979, p. 55.
  2. ^ a b c d Gröner 1985, p. 55.
  3. ^ Gröner 1985, pp. 52-53.
  4. ^ Gröner 1985, p. 53.
  5. ^ Helgason, Guðmundur. "Wilhelm Canaris". German and Austrian U-Boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 11 March 2015. 
  6. ^ Helgason, Guðmundur. "Ships hit by UB-128". German and Austrian U-Boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 11 March 2015. 

Bibliography[edit]