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| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
|---|---|---|---|---|---|---|---|
| O2 (ex-I) | 133 | De Schelde, Vlissingen | 10.1909 | 30.1.1911 | 12.1911 | stricken 1931 | |
| O3 (ex-II) | 138 | De Schelde, Vlissingen | 12.1910 | 30.7.1912 | 2.1913 | stricken 1932 | |
| O4 (ex-III) | 147 | De Schelde, Vlissingen | 6.1912 | 5.8.1913 | 6.1914 | stricken 1935 | |
| O5 (ex-IV) | 148 | De Schelde, Vlissingen | 6.1912 | 2.10.1913 | 8.1914 | stricken 1935 |
| Displacement standard, t | |
|---|---|
| Displacement normal, t | 130 / 150 |
| Length, m | 31.1 pp 32.1 oa |
| Breadth, m | 3.30 |
| Draught, m | 2.73 |
| No of shafts | 1 |
| Machinery | 1 MAN 6-cyl diesel / 1 electric motor |
| Power, h. p. | 350 / 200 |
| Max speed, kts | 11 / 8.6 |
| Fuel, t | diesel oil |
| Endurance, nm(kts) | 500(10) / 35(7) |
| Armament | 2 - 450 TT (bow, 4) |
| Complement | 10 |
| Diving depth operational, m | 25 |
Hay-Fiume type, design of Marley F. Hay and Whitehead Co, Fiume (Austria-Hungary). Single-hulled with one main ballast tank. Suffered from bad stability.
None.
No significant events.
Many thanks to Wolfgang Stöhr for additional information on this page.

