SM U-138

SM U-138[Note 1] was one of the 329 submarines serving in the Imperial German Navy in World War I. U-138 was engaged in the naval warfare and took part in the First Battle of the Atlantic. [2]

For other ships with the same name, see German submarine U-138.
History
German Empire
Name: U-138
Ordered: 27 May 1916
Builder: Kaiserliche Werft Danzig
Launched: 12 January 1917
Commissioned: 26 March 1918
General characteristics [1]
Class and type: German Type U 127 submarine
Displacement:
  • 1,175 t (1,156 long tons) surfaced
  • 1,534 t (1,510 long tons) submerged
Length:
Beam:
  • 7.54 m (24 ft 9 in) o/a
  • 4.85 m (15 ft 11 in) pressure hull
Height: 9.46 m (31 ft)
Draught: 4.26 m (14 ft)
Installed power:
  • 2 × MAN diesel engines, 3,400 bhp (2,500 kW) total
  • 2 × diesel generators for surface dash, 890 brake horsepower (660 kW) total
  • 2 × electric motors, 1,670 shp (1,240 kW) total
Propulsion: 2 × propeller shafts
Speed:
  • 17 knots (31 km/h; 20 mph) surfaced
  • 9.1 knots (16.9 km/h; 10.5 mph) submerged
Range:
  • 10,000 nmi (19,000 km; 12,000 mi) at 8 knots (15 km/h; 9.2 mph) surfaced
  • 50 nmi (93 km; 58 mi) at 4.5 knots (8.3 km/h; 5.2 mph) submerged
Test depth: 75 m (246 ft)
Complement: 44 men
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, pp. 15-16.
  2. Helgason, Guðmundur. "WWI U-boats: U 138". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 22 January 2010.

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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