Osyotr 1904
Paltus 1905
| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
| Осётр [Osyotr] (ex-Protector) | Lake, Bridgeport, USA | 1901 | 1.11.1902 | 8/1905 | stricken 8.1913 | ||
| Бычок [Bychok] | 51 | Newport News SB, USA // Libava N Yd | 1904 | 22.11.1905 | 1906 | stricken 11.1913 | |
| Палтус [Paltus] | 52 | Newport News SB, USA // Libava N Yd | 1904 | 12.12.1905 | 1906 | stricken 11.1913 | |
| Плотва [Plotva] | 53 | Newport News SB, USA // Libava N Yd | 1904 | 22.11.1905 | 1906 | stricken 11.1913 | |
| Кефаль [Kefal'] | 54 | Newport News SB, USA // Libava N Yd | 1904 | 18.5.1905 | 10/1905 | deleted 4.1916 | |
| Сиг [Sig] | 55 | Newport News SB, USA // Libava N Yd | 1904 | 7/1905 | 8/1905 | stricken 7.1914 |
|
Displacement standard, t |
|
|
Displacement normal, t |
Osyotr: 136 / 174 others: 153 / 187 - 189 |
|
Length, m |
Osyotr: 19.8 others: 22.0 |
|
Breadth, m |
Osyotr: 3.40 others: 3.50 - 3.60 |
|
Draught, m |
3.70 |
|
No of shafts |
2 |
|
Machinery |
2 gasoline engines / 2 electric motors |
|
Power, h. p. |
Osyotr: 240 / 120 others: 240 / 130 |
|
Max speed, kts |
Osyotr: 8.5 / 5.6 others: 7.4 - 8.3 / 4.6 - 5 |
|
Fuel, t |
gasoline |
| Endurance, nm(kts) | 250 - 350 (5) / 17 - 30(3) |
|
Armament |
3 - 450 TT (2 bow, 1 stern, 5) |
|
Complement |
12 |
| Diving depth operational, m |
30 max |
Project history: Five ordered on 10 May 1904 from the Simon Lake Wks under the 1904 Emergency Programme, while Protector was bought to lead assembly of the whole series and arrived at Kronstadt on 15 June. Renamed Osyotr ('Sturgeon'), she had hydraulically operated wheels (stowed within the keel) to allow the submarine to move on the sea bed and was fitted with a chamber to embark divers when submerged.
Modernizations: None.
Naval service: No significant events.
Paltus 1907
Many thanks to Wolfgang Stöhr for additional information on this page.
© Ivan Gogin, 2014