Technical information
| Type | Submarine |
| Displacement | 390 / 540 BRT |
| Length | 55 m |
| Complement | 28 men |
| Armament | 6 18" torpedo tubes (4 bow, 2 stern) 1 76mm deck gun |
| Max speed | 14 / 9 knots (surfaced/submerged) |
| Engines | Diesels / Electric, 2 shafts |
| Power | 1300 / 700 HP (surfaced/submerged) (surfaced/submerged) |
| Notes on class | These two submarines were the backbone of the Latvian fleet. They were taken over by the Soviets on 13 August 1940. |
All ships of the Ronis class
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| Ronis | Lost on 23 Jun 1941 | |
| Spidola | Lost on 23 Jun 1941 | |
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Soviet Navy (more on See all Submarine classes.
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Books dealing with this subject include:
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