Technical information
| Type | Submarine |
| Displacement | 595 BRT |
| Length | 62.4m |
| Complement | 39 men |
| Armament | 1 3.9" gun 2 MG 6 21" torpedo tubes (2 bow, 2 bow external, 2 stern external) |
| Max speed | 14 / 9.5 knots (surfaced/submerged) |
| Engines | Diesel / electric, 2 shafts |
| Power | 1300 / 1000 HP (surfaced/submerged) |
| Notes on class |
All ships of the Katsonis class
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| RHS Katsonis (Y 1) | Lost on 14 Sep 1943 | |
| RHS Papanikolis (Y 2) | ||
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Royal Hellenic Navy (more on See all Submarine classes.