SM U-46

History
German Empire
NameU-46
Ordered4 August 1914
BuilderKaiserliche Werft, Danzig
Yard number24
Launched18 May 1915
Commissioned17 December 1915
FateSurrendered to Japan 26 November 1918
Japanese Empire
NameO-2
Acquired26 November 1918
Commissioned1920
Decommissioned1921
Fate
  • Possibly scrapped 1922;
  • Possibly foundered on 21 April 1925 or
  • Scuttled on or after 5 August 1927
General characteristics
Class & typeType U-43 submarine
Displacement
  • 725 t (714 long tons) surfaced
  • 940 t (930 long tons) submerged
Length65.00 m (213 ft 3 in) (o/a)
Beam
  • 6.20 m (20 ft 4 in) (oa)
  • 4.18 m (13 ft 9 in) (pressure hull)
Height9.00 m (29 ft 6 in)
Draught3.74 m (12 ft 3 in)
Installed power
  • 2 × 2,000 PS (1,471 kW; 1,973 shp) surfaced
  • 2 × 1,200 PS (883 kW; 1,184 shp) submerged
Propulsion2 shafts
Speed
  • 15.2 knots (28.2 km/h; 17.5 mph) surfaced
  • 9.7 knots (18.0 km/h; 11.2 mph) submerged
Range
  • 11,400 nmi (21,100 km; 13,100 mi) at 8 knots (15 km/h; 9.2 mph) surfaced
  • 51 nmi (94 km; 59 mi) at 5 knots (9.3 km/h; 5.8 mph) submerged
Test depth50 m (164 ft 1 in)
Complement36
Armament
Service record
Part of:
  • III Flotilla
  • 29 March 1916 – 11 November 1918
Commanders:
  • Kptlt. Leo Hillebrand
  • 17 December 1915 - 6 December 1917
  • Kptlt. Alfred Saalwächter
  • 7 December 1916 – 15 January 1917
  • Kptlt. Leo Hillebrand
  • 16 January – 11 November 1918
Operations: 11 patrols
Victories:
  • 51 merchant ships sunk
    (138,942 GRT)
  • 1 auxiliary warship sunk
    (1,372 GRT)
  • 1 merchant ship damaged
    (7,378 GRT)

SM U-46 was one of the 329 submarines serving in the Imperial German Navy in World War I. U-46 was engaged in the combat during World War I and took part in the First Battle of the Atlantic. After the war, she served in the Imperial Japanese Navy as O-2.

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