Name O 21 class Succeeded by HNLMS Dolfijn | Preceded by O 19 class Built 1937–1940 | |
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Builders R.D.M, Rotterdam (4)
Koninklijke Maatschappij De Schelde, Flushing (2)
Fijenoord, Rotterdam (1) Operators Royal Netherlands Navy
Kriegsmarine | ||
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.
References
O 21-class submarine Wikipedia(Text) CC BY-SA