F1 1912
| No | Name | Builder | Laid down | Launched | Comm | Fate |
| SS20 | F1 (ex-Carp) | Union Iron Wks, San Francisco | 8/1909 | 6/9/1911 | 6/1912 | collision 17/12/1917 |
| SS21 | F2 (ex-Barracuda) | Union Iron Wks, San Francisco | 8/1909 | 19/3/1912 | 6/1912 | stricken 3-8/1922 |
| SS22 | F3 (ex-Pickerel) | Moran, Seattle | 8/1909 | 6/1/1912 | 8/1912 | stricken 3-8/1922 |
| SS23 | F4 (ex-Skate) | Moran, Seattle | 8/1909 | 6/1/1912 | 5/1913 | foundered 25/3/1915 |
|
Displacement standard, t |
|
|
Displacement normal, t |
330 / 400 |
|
Length, m |
43.5 |
|
Breadth, m |
4.70 |
|
Draught, m |
3.70 |
|
No of shafts |
2 |
|
Machinery |
diesels / electric motors |
|
Power, h. p. |
SS20, 21: 780 / 620 SS22, 23: 800 / 620 |
|
Max speed, kts |
13.5 / 11.5 |
|
Fuel, t |
diesel oil |
| Endurance, nm (kts) | 2300 (11) / 100 (5) |
|
Armament |
4 - 450 TT (bow, 4) |
|
Complement |
22 |
|
Diving depth operational, m |
60 |
Ship project history: F class submarines, relatives under characteristics of Å class, were first USN submarines, really suitable for autonomous operations near to coast. They were prototypes for the basic classes of US submarines in days of First world war.
Modernizations: 1915, both: received new diesels.
Naval service: F1 was lost at collision with F3 17/12/1917 off Point Loma, California. F4 foundered by mechanical failure, off Honolulu 25/3/1915, later she was salvaged and stricken.
F3 1912
© Ivan Gogin, 2008-10