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| No | Name | Yard No | Builder | Laid down | Launched | Comm | Fate |
|---|---|---|---|---|---|---|---|
| SS17 | Narwhal, 11.1911- D1 | 156 | Fore River, Quincy | 4/1908 | 8.4.1909 | 11.1909 | stricken 2.1922 |
| SS18 | Grayling, 11.1911- D2 | 157 | Fore River, Quincy | 4/1908 | 16.6.1909 | 11.1909 | stricken 1.1922 |
| SS19 | Salmon, 11.1911- D3 | 158 | Fore River, Quincy | 4/1908 | 12.3.1910 | 9.1910 | stricken 7.1922 |
| Displacement standard, t |
|
|---|---|
| Displacement normal, t | 288 / 337 |
| Length, m | 41.1 |
| Breadth, m | 4.20 |
| Draught, m | 3.60 |
| No of shafts | 2 |
| Machinery | 2 Craig petrol engines / 2 electric motors |
| Power, h. p. | 600 / 260 |
| Max speed, kts | 12 / 9.5 |
| Fuel, t | petrol 5.5 |
| Endurance, nm(kts) | 1240 (9 - 10) / |
| Armament | 4 - 450 TT (bow, 4) |
| Complement | 15 |
| Diving depth operational, m | 60 |
Practically similar to Е class, except for machinery with extremely unreliable and dangerous petrol engines.
none.
All period of service D class submarines were laid in reserve.

