H2 1913
| No | Name | Yard No | Builder | Laid down | Launched | Comm | Fate |
| SS28 | H1 (ex-Seawolf) | 99 | Union Iron Wks, San Francisco | 3/1911 | 6.5.1913 | 12.1913 | wrecked 12.3.1920 |
| SS29 | H2 (ex-Nautilus) | 100 | Union Iron Wks, San Francisco | 3/1911 | 4.6.1913 | 12/1913 | stricken 12.1930 |
| SS30 | H3 (ex-Garfish) | 59 | Moran, Seattle | 4/1911 | 3.7.1913 | 1.1914 | stricken 12.1930 |
| SS147 | H4 (ex-ÀÃ.17 [AG.17]) | Puget Sound N Yd, Bremerton | 5.1918 | 9.10.1918 | 10.1918 | stricken 2.1931 | |
| SS148 | H5 (ex-ÀÃ.18 [AG.18]) | Puget Sound N Yd, Bremerton | 5.1918 | 24.9.1918 | 9.1918 | stricken 2.1931 | |
| SS149 | H6 (ex-ÀÃ.19 [AG.19]) | Puget Sound N Yd, Bremerton | 5.1918 | 26.8.1918 | 9.1918 | stricken 2.1931 | |
| SS150 | H7 (ex-ÀÃ.20 [AG.20]) | Puget Sound N Yd, Bremerton | 5.1918 | 17.10.1918 | 10.1918 | stricken 2.1931 | |
| SS151 | H8 (ex-ÀÃ.27 [AG.27]) | Puget Sound N Yd, Bremerton | 5.1918 | 14.11.1918 | 11.1918 | stricken 2.1931 | |
| SS152 | H9 (ex-ÀÃ.28 [AG.28]) | Puget Sound N Yd, Bremerton | 6.1918 | 23.11.1918 | 11.1918 | stricken 2.1931 |
|
Displacement standard, t |
|
|
Displacement normal, t |
358 / 467 |
|
Length, m |
45.8 |
|
Breadth, m |
4.80 |
|
Draught, m |
3.80 |
|
No of shafts |
2 |
|
Machinery |
2 NLSE diesels / 2 electric motors |
|
Power, h. p. |
950 / 600 |
|
Max speed, kts |
14 / 10.5 |
|
Fuel, t |
diesel oil 34 |
| Endurance, nm(kts) | 2300(11) / 100(5) |
|
Armament |
4 - 450 TT (bow, 8) |
|
Complement |
25 |
|
Diving depth operational, m |
60 |
Project history: This class was considered successful, apart from engine problems; H1 and H3 failed their first engine endurance runs. H4-H9 were originally ordered by the Czarist Russian government as AG17-20, 27 and 28, but they were purchased for the US Navy in 1918. This class should not be confused with the Electric Boat-built British and Chilean 'H' class.
Modernizations: None.
Naval service: No significant events.
H5 1921
© Ivan Gogin, 2014