O 21-class submarine
HNLMS O 21 | |
Class overview | |
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Name: | O 21 class |
Builders: |
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Operators: | |
Preceded by: | O 19 class |
Succeeded by: | HNLMS Dolfijn |
Built: | 1937–1940 |
Completed: | 7 |
General characteristics | |
Type: | Submarine |
Displacement: |
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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: |
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Speed: |
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Range: | |
Complement: | 39 |
Armament: | 8 × 21 in (530 mm) torpedo tubes (4 bow, 2 stern, 2 traversing amidships ) |
The O 21 class was a class of seven submarines, built for the Royal Netherlands Navy. The ships were still incomplete at the start of the German invasion of the Netherlands O 21, O 22, O 23 and O 24 were hastily launched and escaped to the United Kingdom. O 25, O 26 and O 27 were not able to escape and were captured by the German forces. The Kriegsmarine ordered the completion of the ships and they entered German service as U-D3, U-D4 and U-D5. The submarines diving depth was 100 metres (330 ft).
Construction
The ships were built by three different shipyards. O 21 and O 22 were built by the Koninklijke Maatschappij. O 23, O 24, O 26 and O 27 by R.D.M, Rotterdam and O 25 also in Rotterdam at Fijenoord shipyard.
Name | Laid down | Launched | Commissioned | Decommissioned |
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O 21 | 20 November 1937 | 21 October 1939 | 10 May 1940 (uncompleted) | 2 November 1957 |
O 22 | 20 November 1937 | 20 January 1940 | 10 May 1940 (uncompleted) | 8 November 1940 |
O 23 | 12 October 1937 | 5 December 1939 | 13 May 1940 (uncompleted) | 1 December 1948 |
O 24 | 12 November 1937 | 18 March 1940 | 13 May 1940 (uncompleted) | 22 February 1954 |
O 25 Commissioned as: U-D3 |
10 April 1939 | 1 May 1940 | 8 June 1941 | 13 October 1944 3 May 1945 (scuttled) |
O 26 Commissioned as: U-D4 |
20 April 1939 | 23 November 1940 | 28 January 1941 | 3 May 1945 (scuttled) |
O 27 Commissioned as: U-D5 |
3 August 1939 | 1941 | 30 January 1942 13 July 1945 (Dutch navy) |
14 November 1959 |
External links
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