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HNLMS O 23
Career
Name: O 23
Builder: Rotterdamsche Droogdok Maatschappij, Rotterdam
Laid down: 12 October 1937
Launched: 5 December 1939
Commissioned: 13 May 1940
Decommissioned: 1 December 1948
Fate: Sold for scrapping, April 1949
General characteristics [1]
Class & type: O 21-class submarine
Displacement: 990 tons surfaced
1205 tons submerged
Length: 77.7 m (254 ft 11 in)
Beam: 6.8 m (22 ft 4 in)
Draught: 3.95 m (13 ft 0 in)
Propulsion: 2 × 2,500 bhp (1,864 kW) diesel engines
2 × 500 bhp (373 kW) electric motors
Speed: 19.5 kn (36.1 km/h; 22.4 mph) surfaced
9 kn (17 km/h; 10 mph) submerged
Range: 10,000 nmi (19,000 km; 12,000 mi) at 12 kn (22 km/h; 14 mph) surfaced
28 nmi (52 km; 32 mi) at 8.5 kn (15.7 km/h; 9.8 mph) submerged
Complement: 39
Armament: 4 × 21 in (533 mm) bow torpedo tubes
2 × 21 in stern torpedo tubes
2 × 21 in (1×2) external-traversing TT amidships

O 23, laid down K XXIII was a O 21-class submarine of the Royal Netherlands Navy that saw service during World War II. During the war she sank and damaged several ship.

Ship history[edit | edit source]

The submarine was ordered on 9 June 1937 and laid down on 12 October 1937 as K XXIII at the Rotterdamsche Droogdok Maatschappij, Rotterdam. During construction she was renamed O 23, and was finally launched on 5 December 1939. Following the German invasion of 10 May 1940, the O 23 was hastily commissioned, still incomplete, and sailed for England on 13 May to be completed at the Thornycroft shipyard at Southampton.[2]

During the war she operated in the North Sea, the Mediterranean Sea and the Indian Ocean. O 23 made twenty patrols during the war in witch she sank and damaged five ships. She survived the war and was decommissioned on 1 December 1948 and sold for scrapping the following year in April.[2][3]

Summary of raiding history[edit | edit source]

Ships sunk and damaged by O 23.[3]

Date Ship name Nationality/Type Tonnage (GRT) Fate
30 June 1941 Capacitas Italian tanker 5371 Sunk
27 July 1942 Shofuku Maru No.2 Japanese merchant ship 729 Damaged
2 August 1942 Zenyo Maru Japanese army cargo ship 6440 Damaged (burnend out later declared a total loss)
2 August 1942 Ohio Maru Japanese transport ship 5872 Sunk[2]
25 October 1942 Shinyu Maru Japanese merchant ship 4622 Damaged

References[edit | edit source]

  1. "Dutch Submarines: The O 21 submarine class". dutchsubmarines.com. 2012. http://www.dutchsubmarines.com/classes/class_o21.htm. Retrieved 25 July 2013. 
  2. 2.0 2.1 2.2 "Dutch Submarines: The submarine O 23". dutchsubmarines.com. 2012. http://www.dutchsubmarines.com/boats/boat_o23.htm. Retrieved 25 July 2013. 
  3. 3.0 3.1 Helgason, Guðmundur (2013). "HNMS O 23". uboat.net. http://uboat.net/allies/warships/ship/2894.html. Retrieved 25 July 2013. 


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