Chemical tanker · Marshall Islands flag · built 2016
ALKAIOS: CO₂ emissions 2018–2025
IMO 9710488 EU ETS6 reporting years
- CO₂ reported 2025
- 1,952 t
- Fuel burned
- 623 t
- Distance
- 7,105 nm
- Time at sea
- 729 h
- Emitted at berth
- 8% of total
- Share of year under way
- 8%
- Gross tonnage
- 29,770
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ALKAIOS against its type
Built in 2016, it is 6 years newer than the median chemical tanker on this register, which was built in 2010 (1,951 vessels with a known build year). At 29,770 gross tonnage it is larger than 83% 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 563 other vessels here, 2 of them chemical tankers. Its MRV returns name it ALKAIOS for 2018–2020 and MADELYN GRACE for 2022–2025. The returns for 2022–2025 all give Majuro as port of registry.
Its 1,952 t of CO₂ for 2025 is 65% below the median of 5,531 t among the 1,484 chemical tankers on this register that reported for 2025. Per nautical mile it emitted 274.7 kg CO₂, close to the type median of 250.2 kg. It logged 729 hours at sea against a median of 2,106 hours for its type that year. 7.6% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 6 years with reported emissions, the highest was 2020 (8,150 t) and the lowest 2022 (995 t). Its efficiency percentile within the type went from 16 in 2018 to 22 in 2025 (lower is more efficient). Of the 5 comparable vessels listed below with a 2025 return, 4 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 | 1,952 | 623 | 7,105 | 729 | 147 | 274.7 | 9.6 | 22 |
| 2023 | 3,666 | 1,169 | 15,802 | 1,400 | 200 | 232.0 | 9.0 | 10 |
| 2022 | 995 | 313 | — | 443 | 0 | 229.8 | — | — |
| 2020 | 8,150 | 2,602 | 28,099 | 2,686 | 638 | 290.1 | 12.7 | 32 |
| 2019 | 7,317 | 2,341 | 25,498 | 2,204 | 259 | 287.0 | 14.6 | 39 |
| 2018 | 3,550 | 1,130 | 12,239 | 1,061 | 337 | 290.0 | 10.3 | 16 |
Vessel particulars
- IMO number
- 9710488
- Previously reported as
- MADELYN GRACE
- Ship type
- Chemical tanker
- Gross tonnage
- 29,770
- Length overall
- 183.0 m
- Beam
- 32.2 m
- Year built
- 2016
- Flag state
- Marshall Islands per EU MRV 2025
- Builder
- Samsung Heavy Industries
- Port of registry
- Majuro MRV 2025
- Technical efficiency (design)
- EEXI (4.21 gCO₂/t·nm)
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2026-02-17
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 304 of 1,348 qualifying chemical tankers by EEOI, at the 22nd percentile. The dashed line is the type median, 14.4; this vessel reported 9.6.
EEOI divides emissions by transport work, which for this vessel and year was 202,892,931 tonne-miles over 7,105 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 45.0% lower than in 2018, for EU/EEA voyages only. No return is recorded for 2021, 2024, so the series has gaps.
From 2023 to 2025, emissions fell 46.8% while distance sailed fell 55.0%and CO₂ per nautical mile rose 18.4%.That points mainly to how much the vessel sailed, rather than the other.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 1,982 t
- Methane (CH₄)
- 0.03 t
- Nitrous oxide (N₂O)
- 0.11 t
- Under EU ETS
- 1,100 t, 56% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | Lloyd's Register Quality Assurance Ltd | United Kingdom |
| 2019 | HELLENIC LLOYD'S S.A. | Greece |
| 2022 | 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 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.