O 21 class submarine
Encyclopedia
The O 21 class was a class
of seven submarine
s, 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 are 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 meters.
O 23, O 24, O 26 and O 27 by R.D.M, Rotterdam and O 25 also in Rotterdam at Fijenoord shipyard.
Ship class
A ship class is a group of ships of a similar design. This is distinct from a ship-type, which might reflect a similarity of tonnage or intended use. For example, the is a nuclear aircraft carrier of the Nimitz class....
of seven submarine
Submarine
A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has more limited underwater capability...
s, built for the Royal Netherlands Navy
Royal Netherlands Navy
The Koninklijke Marine is the navy of the Netherlands. In the mid-17th century the Dutch Navy was the most powerful navy in the world and it played an active role in the wars of the Dutch Republic and later those of the Batavian Republic and the Kingdom of the Netherlands...
. 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 are 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 meters.
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 |
|---|---|---|---|---|
| HNLMS O 21 | 20 November 1937 | 21 October 1939 | 10 May 1940 (uncompleted) | 2 November 1957 |
| HNLMS O 22 | 20 November 1937 | 20 January 1940 | 10 May 1940 (uncompleted) | 8 November 1940 |
| HNLMS O 23 | 12 October 1937 | 5 December 1939 | 13 May 1940 (uncompleted) | 1 December 1948 |
| HNLMS O 24 | 12 November 1937 | 18 March 1940 | 13 May 1940 (uncompleted) | 22 February 1954 |
| HNLMS O 25 | 10 April 1939 | 1 May 1940 | 8 June 1941 | 13 October 1944 3 May 1945 (scuttled) |
| HNLMS O 26 | 20 April 1939 | 23 November 1940 | 28 January 1941 | 3 May 1945 (scuttled) |
| HNLMS O 27 | 3 August 1939 | 1941 | 30 January 1942 13 July 45 (Dutch navy) |
14 November 1959 |