Ro-ro ship · Luxembourg flag · built 1999
SEA CARYATIS: CO₂ emissions 2018–2025
IMO 9166625 EU ETS6 reporting years
- CO₂ reported 2025
- 21,323 t
- Fuel burned
- 6,699 t
- Distance
- 73,234 nm
- Time at sea
- 5,619 h
- Emitted at berth
- 2% of total
- Share of year under way
- 64%
- Gross tonnage
- 23,987
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SEA CARYATIS against its type
Built in 1999, it is 3 years older than the median ro-ro ship on this register, which was built in 2002 (281 vessels with a known build year). At 23,987 gross tonnage it is larger than 60% of the other 269 ro-ro ships with a recorded tonnage. It is one of 3 ro-ro ships here under the Luxembourg flag, 1.0% of the 311 on the register. The same builder is recorded for 31 other vessels here, one of them a ro-ro ship. Its MRV returns name it VALENTINE for 2018–2020, VALENTINE I for 2023 and SEA CARYATIS for 2024–2025. The reported port of registry changed: antwerp (2018–2020), then Panama (2023–2024), then Luxembourg (2025).
Its 21,323 t of CO₂ for 2025 is close to the median of 21,362 t among the 238 ro-ro ships on this register that reported for 2025. Per nautical mile it emitted 291.2 kg CO₂, 11% below the type median of 327.0 kg. It logged 5,619 hours at sea against a median of 4,872 hours for its type that year. 1.6% of its 2025 emissions were at berth; the median for ro-ro ships was 4.3%. Across 6 years with reported emissions, the highest was 2020 (24,932 t) and the lowest 2023 (483 t). Its efficiency percentile within the type went from 47 in 2018 to 93 in 2025 (lower is more efficient). The one sister ship listed below with a 2025 return reported a lower CO₂ per nautical mile.
Emissions by year2018–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 21,323 | 6,699 | 73,234 | 5,619 | 346 | 291.2 | 230.8 | 93 |
| 2024 | 10,299 | 3,294 | — | 2,658 | 983 | 296.8 | 301.9 | not ranked |
| 2023 | 483 | 155 | — | 136 | 6 | 248.8 | 269.5 | not ranked |
| 2020 | 24,932 | 7,872 | 85,187 | 5,985 | 1,209 | 292.7 | 86.8 | 42 |
| 2019 | 16,498 | 5,241 | 55,736 | 4,272 | 1,684 | 296.0 | 81.3 | 46 |
| 2018 | 21,150 | 6,712 | 69,650 | 5,121 | 1,716 | 303.7 | 84.5 | 47 |
Vessel particulars
- IMO number
- 9166625
- Previously reported as
- VALENTINE, VALENTINE I
- Ship type
- Ro-ro ship
- Gross tonnage
- 23,987
- Length overall
- 162.5 m
- Year built
- 1999
- Flag state
- Luxembourg per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list Malta. The flag shown is from the newest official source, the EU MRV return for 2025. - Builder
- Kawasaki Heavy Industries
- Port of registry
- Luxembourg MRV 2025
- Ice class
- IC
- Technical efficiency (design)
- EEXI (18.4 gCO₂/t·nm)
- Operator
- Interislander
- Verifier
- ICS Verification Services Single Member P.C., Greece
- Accreditation
- 1101-3
- Compliance document issued
- 2026-02-16
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 179 of 192 qualifying ro-ro ships by EEOI, at the 93rd percentile. The dashed line is the type median, 85.3; this vessel reported 230.8.
EEOI divides emissions by transport work, which for this vessel and year was 92,366,212 tonne-miles over 73,234 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 0.8% higher than in 2018, for EU/EEA voyages only. No return is recorded for 2021, 2022, so the series has gaps.
From 2024 to 2025, emissions rose 107.0% and CO₂ per nautical mile fell 1.9%.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
- 21,652 t
- Methane (CH₄)
- 0.34 t
- Nitrous oxide (N₂O)
- 1.21 t
- Under EU ETS
- 18,175 t, 85% of total
Laden voyages2025
- CO₂ on laden voyages
- 19,588 t, 92% of total
- Fuel, laden
- 6,154 t
- CO₂ per nm, laden
- 292.9 kg
The rest of the 2025 total was emitted on ballast legs or at berth.
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | DNV | Germany |
| 2023 | ICS Verification Services Single Member P.C. | Greece |
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 6 MRV reporting years, an efficiency ranking, 5 of 5 vessel particulars, a name history and a licensed photograph. Not found in the sources for this vessel: AIS movements in Norwegian waters, 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.