H2 1930
H1 1943
| Name | No | Builder | Laid down | Launched | Comp | Fate |
| H1 | Canadian Vickers, Montreal, Canada | 5/1916 | 16/10/1916 | 12/1916 | stricken 3/1947 | |
| H2 | Canadian Vickers, Montreal, Canada | 5/1916 | 19/10/1916 | 12/1916 | stricken 3/1947 | |
| H3 | Canadian Vickers, Montreal, Canada | 8/1916 | 26/4/1917 | 5/1917 | stricken 4/1937 | |
| H4 | Canadian Vickers, Montreal, Canada | 8/1916 | 17/4/1917 | 5/1917 | stricken 3/1947 | |
| H5 | Canadian Vickers, Montreal, Canada | 8/1916 | 25/4/1917 | 5/1917 | sunk 16/4/1918 | |
| H6 | Canadian Vickers, Montreal, Canada | 11/1916 | 23/4/1917 | 7/1917 | captured by Germany 14/9/1943 | |
| H7 | Canadian Vickers, Montreal, Canada | 11/1916 | 24/5/1917 | 5/1917 | stricken 10/1930 | |
| H8 | Canadian Vickers, Montreal, Canada | 11/1916 | 24/5/1917 | 6/1918 | sunk 5/6/1943 |
|
Displacement standard, t |
343 |
|
Displacement normal, t |
364 / 475 |
|
Length, m |
45.8 |
|
Breadth, m |
4.69 |
|
Draught, m |
3.76 |
|
No of shafts |
2 |
|
Machinery |
NLSE diesels / Dynamic Electric electric motors |
|
Power, h. p. |
480 / 620 |
|
Max speed, kts |
12 / 11 |
|
Fuel, t |
diesel oil 16 |
| Endurance, nm(kts) | 2640(11) / 110(5) |
|
Armament |
4 - 450 TT (bow, 6) |
|
Complement |
22 |
| Diving depth operational, m | 50 |
Ship project history: The well-known Holland boats, built in the USA and assembled in Canada in 1916-1917. One of the most successful projects of time. Single-hulled.
Modernizations: 1920, all survived: + 1 x 1 - 76/30 Armstrong 1914.
Naval service: H5 was sunk 16/4/1918 by mistake in Southern Adriatic by British sister-ship H1 (temporarily called HB1, not to confuse British and Italian submarines). H8 was sunk at La Spezia 5/6/1943 by Allied aircraft. H6 was captured by German troops in September, 1943 and scuttled by them.
Italian H class submarine 1947
© Ivan Gogin, 2009-11