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| Name | No | Yard No | Builder | Laid down | Launched | Comm | Fate |
|---|---|---|---|---|---|---|---|
| Ύδρα [Hydra], 1889- Αμβρακία [Amvrakia] | Thames Iron Wks, Blackwall, UK | 1881 | 1881 | discarded 1931 | |||
| Σπέτσαι [Spetsai], 1889- Ακτίου [Aktion] | Thames Iron Wks, Blackwall, UK | 1881 | 1881 | captured by France 1917 (Aktion), returned 12.1918, deleted 1920 |
| Displacement normal, t | 433 |
|---|---|
| Displacement full, t | 470 |
| Length, m | 39.0 pp |
| Breadth, m | 7.90 |
| Draught, m | 2.20 |
| No of shafts | 2 |
| Machinery | 2 VC |
| Power, h. p. | 690 |
| Max speed, kts | 12 |
| Fuel, t | coal 60 |
| Endurance, nm(kts) | |
| Armament | 1 x 1 - 263/27 RK L/30 C/84, 1 x 1 - 149/27 RK L/30 C/83, 2 x 1 - 37/20 Hotchkiss, 1 - 356 TT (bow) |
| Complement | 64 |
Iron-hulled screw gunboats of Rendel type.
1910, Amvrakia: - 1 x 1 - 149/27, 2 x 1 - 37/20
1910, Aktion: - 1 x 1 - 149/27, 2 x 1 - 37/20; + 4 x 1 - 47/40 Hotchkiss
Aktion served in 1917-1918 under French flag.

