M/F Finnsirius
| Route | Kapellskär - (Långnäs) - Naantali (Nådendal) |
| IMO | 9902419 |
| Building year | 2023 |
| Building yard | China Merchants Jinling Shipyard (Weihai), China (#W0276) |
| Owner | Finnlines Plc |
| Operator | FinnLink |
| Length | 235,6 m |
| Breadth | 33,3 m |
| Draft | 7,1 m |
| GT | 65.692 |
| Machinery | 4 * Wärtsilä 6L46F |
| Speed | 20,5 kn. |
| Number of passengers | 1.100 |
| Number of beds | 1.212 |
| Number of cars | ? |
| Lanemetres | 5.200 |
| Port of registry | Mariehamn |
| Flag | Finland |
| Former names | |
| Former owners | - |
| Sister ships | Finncanopus, |
| Notes | - |
- M/F Finnsirius
Photo: Göran Olsson (Helsingborg, 7/9-2023)
- M/F Finnsirius
Photo: Michael Koefoed-Hansen (Kapellskär, 9/7-2024)
- M/F Finnsirius
Photo: Michael Koefoed-Hansen (Kapellskär, 9/7-2024)
- M/F Finnsirius
Photo: Michael Koefoed-Hansen (Kapellskär, 9/7-2024)