Oil tanker · Portugal flag · built 2009
BLUE SEA: CO₂ emissions 2018–2025
IMO 9413028 EU ETS3 reporting years
- CO₂ reported 2025
- 6,501 t
- Fuel burned
- 2,067 t
- Distance
- 11,337 nm
- Time at sea
- 1,604 h
- Emitted at berth
- 4% of total
- Share of year under way
- 18%
- Gross tonnage
- 55,863
BLUE SEA against its type
Built in 2009, it is 1 year older than the median oil tanker on this register, which was built in 2010 (2,896 vessels with a known build year). At 55,863 gross tonnage it is smaller than 57% of the other 2,841 oil tankers with a recorded tonnage. It is one of 56 oil tankers here under the Portugal flag, 1.6% of the 3,548 on the register. The same builder is recorded for 57 other vessels here, 42 of them oil tankers. The reported port of registry changed: Monrovia (2018–2023), then Madeira (2025).
Its 6,501 t of CO₂ for 2025 is 18% below the median of 7,922 t among the 1,704 oil tankers on this register that reported for 2025. Per nautical mile it emitted 573.5 kg CO₂, 42% above the type median of 403.2 kg. It logged 1,604 hours at sea against a median of 2,030 hours for its type that year. 3.8% of its 2025 emissions were at berth; the median for oil tankers was 7.8%. Across 3 years with reported emissions, the highest was 2018 (10,668 t) and the lowest 2023 (6,041 t). Its efficiency percentile within the type went from 72 in 2018 to 39 in 2025 (lower is more efficient). Of the 2 sister ships 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 | 6,501 | 2,067 | 11,337 | 1,604 | 250 | 573.5 | 6.6 | 39 |
| 2023 | 6,041 | 1,927 | — | 1,089 | 333 | 530.9 | — | — |
| 2018 | 10,668 | 3,418 | 21,798 | 2,858 | 423 | 489.4 | 11.6 | 72 |
Vessel particulars
- IMO number
- 9413028
- Ship type
- Oil tanker
- Gross tonnage
- 55,863
- Length overall
- 229.0 m
- Beam
- 42.0 m
- Year built
- 2009
- Flag state
- Portugal per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list Liberia. The flag shown is from the newest official source, the EU MRV return for 2025. - Builder
- Sumitomo Heavy Industries
- Port of registry
- Madeira MRV 2025
- Home port
- Madeira
- Technical efficiency (design)
- EEXI (3.45 gCO₂/t·nm)
- Verifier
- AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD), Greece
- Accreditation
- 1083-2
- Compliance document issued
- 2026-03-27
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 559 of 1,448 qualifying oil tankers by EEOI, at the 39th percentile. The dashed line is the type median, 7.5; this vessel reported 6.6.
EEOI divides emissions by transport work, which for this vessel and year was 979,102,410 tonne-miles over 11,337 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 39.1% lower than in 2018, for EU/EEA voyages only. No return is recorded for 2019, 2020, 2021, 2022, 2024, so the series has gaps.
From 2023 to 2025, emissions rose 7.6% and CO₂ per nautical mile rose 8.0%.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
- 6,603 t
- Methane (CH₄)
- 0.10 t
- Nitrous oxide (N₂O)
- 0.37 t
- Under EU ETS
- 3,376 t, 52% of total
Laden voyages2025
- CO₂ on laden voyages
- 5,305 t, 82% of total
- Fuel, laden
- 1,694 t
- CO₂ per nm, laden
- 509.1 kg
The rest of the 2025 total was emitted on ballast legs or at berth.
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).
This page draws on 3 MRV reporting years, an efficiency ranking and 5 of 5 vessel particulars. Not found in the sources for this vessel: AIS movements in Norwegian waters, a name history, a licensed photograph, 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.