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| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
|---|---|---|---|---|---|---|---|
| В.1 [V.1] | Russud, Nikolayev | 1917 | --- | --- | suspended 1918 | ||
| В.2 [V.2] | Russud, Nikolayev | 1917 | --- | --- | suspended 1918 | ||
| В.3 [V.3] | Russud, Nikolayev | 1917 | --- | --- | suspended 1918 | ||
| В.4 [V.4] | Russud, Nikolayev | 1917 | --- | --- | suspended 1918 |
| Displacement standard, t | |
|---|---|
| Displacement normal, t | 920 / 1146 - 1150 |
| Length, m | 74.0 |
| Breadth, m | 6.50 |
| Draught, m | 4.27 |
| No of shafts | 2 |
| Machinery | 4 diesels / 2 electric motors |
| Power, h. p. | 2200 / 900 |
| Max speed, kts | 16 / 9 |
| Fuel, t | diesel oil |
| Endurance, nm(kts) | 3000(10) / 100(5) |
| Armament | 2 x 1 - 102/33 Obukhov, 1 x 1 - 57/50 Hotchkiss, 16 - 450 TT (4 bow, 2 stern, 4 beam, 6 ext drop-collars, 20), 10 mines |
| Complement | 50 |
| Diving depth operational, m | 45 |
In the 1916 Submarine Programme, designated for the Black Sea Fleet. Fiat design 176-bis, double hull type, 7 watertight compartments. Ordered in 1916 and construction of the first 4 begun 1916-17 but abandoned after the Bolshevik Revolution.

