Ro-pax ship · Sweden flag · built 1991
SILJA SYMPHONY: CO₂ emissions 2018–2025
IMO 8803769 EU ETS8 reporting years
- CO₂ reported 2025
- 53,246 t
- Fuel burned
- 16,608 t
- Time at sea
- 6,369 h
- Emitted at berth
- 6% of total
- Share of year under way
- 73%
- Gross tonnage
- 58,377
SILJA SYMPHONY against its type
Built in 1991, it is 9 years older than the median ro-pax ship on this register, which was built in 2000 (483 vessels with a known build year). At 58,377 gross tonnage it is larger than 97% of the other 470 ro-pax ships with a recorded tonnage. It is one of 20 ro-pax ships here under the Sweden flag, 4.1% of the 493 on the register. No other vessel on this register is recorded with the same builder. The returns for 2018–2025 all give Stockholm as port of registry.
Its 53,246 t of CO₂ for 2025 is 1.8 times the median of 30,062 t among the 417 ro-pax ships on this register that reported for 2025. Per nautical mile it emitted 551.3 kg CO₂, 18% above the type median of 467.6 kg. It logged 6,369 hours at sea against a median of 4,243 hours for its type that year. 5.7% of its 2025 emissions were at berth; the median for ro-pax ships was 6.7%. Across 8 years with reported emissions, the highest was 2018 (60,083 t) and the lowest 2020 (24,224 t). Of the 7 comparable vessels listed below with a 2025 return, 2 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2018–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 53,246 | 16,608 | — | 6,369 | 3,014 | 551.3 | — | — |
| 2024 | 56,087 | 17,729 | — | 6,334 | 3,323 | 583.2 | — | — |
| 2023 | 54,099 | 16,874 | — | 6,127 | 3,223 | 583.4 | — | — |
| 2022 | 53,071 | 16,842 | — | 6,268 | 2,843 | 561.9 | — | — |
| 2021 | 29,724 | 9,433 | — | 3,109 | 3,782 | 625.5 | — | — |
| 2020 | 24,224 | 7,687 | — | 2,288 | 5,190 | 700.0 | — | — |
| 2019 | 57,023 | 18,093 | — | 5,972 | 4,257 | 624.4 | — | — |
| 2018 | 60,083 | 19,068 | — | 6,220 | 5,549 | 622.3 | — | — |
Vessel particulars
- IMO number
- 8803769
- Ship type
- Ro-pax ship
- Gross tonnage
- 58,377
- Length overall
- 203.0 m
- Beam
- 32.0 m
- Year built
- 1991
- Flag state
- Sweden per EU MRV 2025
- Builder
- Masa Yards
- Port of registry
- Stockholm MRV 2025
- Home port
- Stockholm
- Ice class
- IA Super
- Technical efficiency (design)
- EIV (2.95 gCO₂/t·nm)
- Verifier
- NORMEC VERIFAVIA SAS, France
- Accreditation
- 3-2127
- Compliance document issued
- 2026-03-31
- Compliance document expires
- 2027-06-30
Reported CO₂ by year
Reported CO₂ in 2025 was 11.4% lower than in 2018, for EU/EEA voyages only.
From 2024 to 2025, emissions fell 5.1% and CO₂ per nautical mile fell 5.5%.Distance is missing for at least one of the two years, so activity and efficiency cannot be separated here.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 54,061 t
- Methane (CH₄)
- 0.83 t
- Nitrous oxide (N₂O)
- 2.99 t
- Under EU ETS
- 15,889 t, 30% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | VERIFAVIA (UK) LTD | United Kingdom |
| 2020 | NORMEC VERIFAVIA SAS | France |
A change of verifier is not in itself a sign of anything being wrong.
Sources and how to read this
- Emissions: EU MRV publication (THETIS-MRV), reporting years 2018–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0) and Wikimedia Commons.
This page draws on 8 MRV reporting years, 5 of 5 vessel particulars and a licensed photograph. Not found in the sources for this vessel: an efficiency ranking, AIS movements in Norwegian waters, a name history, a sanctions listing and US port state inspections.
Empty means unreported, never zero. How EEOI, distance, percentiles and sister ships are handled is explained under reading a vessel page. Something wrong? See corrections.