HNLMS O 23

Career (Netherlands)
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 and 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 as K XXIII, was an O 21-class submarine of the Royal Netherlands Navy that saw service during World War II. During the war she sank and damaged several ships.

Ship history

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, 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 the course of which she sank and damaged five ships. She survived the war and was decommissioned on 1 December 1948, being sold for scrap in April of the following year.[2][3]

Summary of raiding history

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

  1. "Dutch Submarines: The O 21 submarine class". dutchsubmarines.com. 2012. Retrieved 25 July 2013.
  2. 2.0 2.1 2.2 "Dutch Submarines: The submarine O 23". dutchsubmarines.com. 2012. Retrieved 25 July 2013.
  3. 3.0 3.1 Helgason, Guðmundur (2013). "HNMS O 23". uboat.net. Retrieved 25 July 2013.