Royal Netherlands Navy — Submarine class
O 21-class submarine
O 21 class
The class in numbers
- 7 Completed
- 2 Lost
- 5 Scrapped
Design and service
- Type
- Submarine
- Navies
- Royal Netherlands Navy 6
Kriegsmarine 1 - Built
- 1937–1942
- In commission
- 1940–1959
- Preceded by
- O 19-class submarine
- Succeeded by
- Dolfijn-class submarine
- Builders
- Rotterdamsche Droogdok Maatschappij
- Koninklijke Maatschappij De Schelde
- Wilton-Fijenoord
Class specifications
Figures for the class as designed. Individual vessels varied, sometimes considerably — each vessel page carries its own configurations.
As built
- Displacement, surfaced
- 990 long tons (1,006 t)
- Displacement, submerged
- 1,205 long tons (1,224 t)
- Length
- 77.7 m (254.9 ft)
- Speed
- 19.5 knots (36.1 km/h, 22.4 mph)
- Complement
- 39
- Main gun
- 88 mm (3.5 in)
- Armament
- 8 × 21 in torpedo tubes (4 bow, 2 stern, 2 traversing amidships )
- 1 × 88 mm deck gun
- 2 × 40 mm AA guns
- 1 × 12.7 mm machine gun
Roster
| Vessel | Pennant | Commissioned | Fate |
|---|---|---|---|
| German submarine UD-3 | 1941 | Scuttled 1945 | |
| German submarine UD-4 | 1941 | Scuttled 1945 | |
| German submarine UD-5 | 1942 | Scrapped 1961 | |
| HNLMS O 21 | 1940 | Scrapped 1958 | |
| HNLMS O 22 | 1940 | Sunk 1940 | |
| HNLMS O 23 | 1940 | Scrapped 1949 | |
| HNLMS O 24 | 1940 | Scrapped 1963 |
Sources
- Facts harvested from O 21-class submarine on Wikipedia. Figures only — no wording is taken from it.