Technical information
| Type | Minelayer |
| Displacement | 593 BRT |
| Length | 49,7m |
| Complement | 59 men |
| Armament | 3 3" guns (3x1) 2 .5" MG AA 1 .25" MG AA (Medusa only) 70 mines (Medusa 73 mines) |
| Max speed | 11 knots |
| Engines | Triple-expansion-engines, 2 shafts |
| Power | 800 HP |
| Notes on class |
All ships of the Hydra class
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| HNMS Medusa | ||
| HNMS Hydra | Lost on 15 May 1940 | |
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Royal Dutch Navy (more on See all Minelayer classes.