Chemical tanker · Marshall Islands flag · built 2019
OPTIMUS: CO₂ emissions 2019–2025
IMO 9835044 EU ETS7 reporting years
- CO₂ reported 2024
- 5,243 t
- Fuel burned
- 1,674 t
- Distance
- 19,287 nm
- Time at sea
- 1,800 h
- Emitted at berth
- 9% of total
- Share of year under way
- 20%
- Gross tonnage
- 29,914
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OPTIMUS against its type
Built in 2019, it is 9 years newer than the median chemical tanker on this register, which was built in 2010 (1,951 vessels with a known build year). At 29,914 gross tonnage it is larger than 85% of the other 1,899 chemical tankers with a recorded tonnage. It is one of 474 chemical tankers here under the Marshall Islands flag, 20.2% of the 2,344 on the register. The same builder is recorded for 77 other vessels here, 27 of them chemical tankers. Its MRV returns name it STAVANGER PIONEER for 2019–2023 and OPTIMUS for 2024–2025. The reported port of registry changed: Stavanger (2019–2023), then MAJURO (2024–2025).
Its 5,243 t of CO₂ for 2024 is 10% below the median of 5,830 t among the 1,451 chemical tankers on this register that reported for 2024. Per nautical mile it emitted 271.8 kg CO₂, close to the type median of 253.5 kg. It logged 1,800 hours at sea against a median of 2,177 hours for its type that year. 8.8% of its 2024 emissions were at berth; the median for chemical tankers was 5.9%. Across 6 years with reported emissions, the highest was 2023 (7,244 t) and the lowest 2019 (2,967 t). Its efficiency percentile within the type went from 75 in 2020 to 27 in 2024 (lower is more efficient). Of the 2 sister ships listed below with a 2024 return, 2 reported a lower CO₂ per nautical mile than this vessel.
No EU/EEA voyages were reported for 2025: zero CO₂ and zero time at sea, left out of the trend and of any ranking.
Emissions by year2019–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | No EU/EEA voyages reported | |||||||
| 2024 | 5,243 | 1,674 | 19,287 | 1,800 | 463 | 271.8 | 11.1 | 27 |
| 2023 | 7,244 | 2,313 | 28,554 | 2,495 | 458 | 253.7 | 13.7 | 83 |
| 2022 | 4,192 | 1,344 | 18,645 | 1,609 | 60 | 224.8 | 6.3 | 30 |
| 2021 | 3,342 | 1,070 | 12,584 | 1,018 | 140 | 265.6 | 7.1 | 36 |
| 2020 | 4,553 | 1,456 | 16,590 | 1,375 | 113 | 274.4 | 13.2 | 75 |
| 2019 | 2,967 | 947 | — | 695 | 581 | 361.6 | 29.1 | not ranked |
Vessel particulars
- IMO number
- 9835044
- Previously reported as
- STAVANGER PIONEER
- Ship type
- Chemical tanker
- Gross tonnage
- 29,914
- Length overall
- 183.0 m
- Beam
- 32.2 m
- Year built
- 2019
- Flag state
- Marshall Islands per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list Norway. The flag shown is from the newest official source, the EU MRV return for 2025. - Port of registry
- MAJURO MRV 2024
- Technical efficiency (design)
- EEXI (4.17 gCO₂/t·nm)
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2025-04-13
- Compliance document expires
- 2026-06-30
Efficiency against its own type2024
Position 324 of 1,194 qualifying chemical tankers by EEOI, at the 27th percentile. The dashed line is the type median, 15.9; this vessel reported 11.1.
EEOI divides emissions by transport work, which for this vessel and year was 472,756,537 tonne-miles over 19,287 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2024 was 76.7% higher than in 2019, for EU/EEA voyages only.
From 2023 to 2024, emissions fell 27.6% while distance sailed fell 32.5%and CO₂ per nautical mile rose 7.2%.That points mainly to how much the vessel sailed, rather than the other.
Where the 2024 emissions occurred
Methane, nitrous oxide and EU ETS2024
- Total CO₂ equivalent
- 5,325 t
- Methane (CH₄)
- 0.08 t
- Nitrous oxide (N₂O)
- 0.30 t
- Under EU ETS
- 1,005 t, 19% of total
Laden voyages2024
- CO₂ on laden voyages
- 2,305 t, 44% of total
- Fuel, laden
- 736 t
- CO₂ per nm, laden
- 232.2 kg
The rest of the 2024 total was emitted on ballast legs or at berth.
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2019 | VERIFAVIA (UK) LTD | United Kingdom |
| 2020 | NORMEC VERIFAVIA SAS | France |
| 2023 | AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD) | Greece |
| 2024 | DNV | Germany |
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 2019–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0) and Wikimedia Commons.
This page draws on 7 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.