O12 1939
| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
| O12 | 186 | De Schelde, Vlissingen | 10.1928 | 8.11.1930 | 7.1931 | scuttled 14.5.1940 | |
| O13 | 190 | De Schelde, Vlissingen | 12.1928 | 18.4.1931 | 10.1931 | sunk 13?.6.1940 | |
| O14 | 191 | De Schelde, Vlissingen | 12.1928 | 3.10.1931 | 3.1932 | stricken 6.1943 | |
| O15 | 319 | Wilton-Fijenoord, Schiedam | 3.1930 | 27.5.1931 | 7.1932 | stricken 9.1945 |
|
Displacement standard, t |
548 |
|
Displacement normal, t |
610 / 754 |
|
Length, m |
60.4 |
|
Breadth, m |
6.83 |
|
Draught, m |
3.60 |
|
No of shafts |
2 |
|
Machinery |
O12 - 14: 2 Sulzer 6-cyl diesels / 2 Schmitt electric motors O15: 2 MAN 6-cyl diesels / 2 Schmitt electric motors |
|
Power, h. p. |
1800 / 620 |
|
Max speed, kts |
16 / 8 |
|
Fuel, t |
diesel oil |
|
Endurance, nm(kts) |
3500(10) / 26(8) |
|
Armament |
2 x 1 - 40/36 Bofors, 1 x 1 - 12.7/90, 5 - 533 TT (4 bow, 1 stern, 10) |
|
Complement |
31 |
| Diving depth operational, m | 60 |
Project history: Ordered in 1927-1929, these submarines were a considerable step forward for Dutch submarines. They were first Dutch submarines, armed by only 533mm torpedoes. They were armed by 2 single 40mm/40 MGs in disappearing mounts repeated subsequently on other classes. They were the first Dutch submarines with electrically-driven periscopes and a purification system of lenses by pressured air. Submarines were differed by bad stability. For elimination of this lack in 1936-1937 amidships ballast tank was enlarged and both 40mm MGs were removed (accordingly the CT form was altered) then the stability has settled into shape.
Modernizations: 1936-1937, all: - 2 x 1 - 40/40
Naval service: O12 was scuttled at Den Helder 14.5.1940; subsequently she was salvaged by German wreckers and 30.1.1943 entered German service as UD2, stricken 6.7.1944 and scuttled at Kiel 3.5.1945, subsequently she was salvaged and broken up. O13 was lost in the North Sea in June, 1940 by unknown cause. Probable causes of loss: mine, underwater collision with Polish submarine Wilk 20.6.1940 or German air attack 16.6.1940.
O15
Many thanks to Wolfgang Stöhr for additional information on this page.
© Ivan Gogin, 2011-14