Chemical tanker · Marshall Islands flag · built 2014
GREEN SKY: CO₂ emissions 2018–2025
IMO 9676515 EU ETS7 reporting years
- CO₂ reported 2024
- 4,138 t
- Fuel burned
- 1,316 t
- Distance
- 17,056 nm
- Time at sea
- 2,239 h
- Emitted at berth
- 5% of total
- Share of year under way
- 25%
- Gross tonnage
- 30,263
GREEN SKY against its type
Built in 2014, it is 4 years newer than the median chemical tanker on this register, which was built in 2010 (1,951 vessels with a known build year). At 30,263 gross tonnage it is larger than 95% 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. Its MRV returns name it GREEN SKY for 2018–2024 and WONDER MAIA for 2025. The reported port of registry changed: Monrovia (2018–2024), then Majuro (2025).
Its 4,138 t of CO₂ for 2024 is 29% 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 242.6 kg CO₂, close to the type median of 253.5 kg. It logged 2,239 hours at sea against a median of 2,177 hours for its type that year. 5.4% of its 2024 emissions were at berth; the median for chemical tankers was 5.9%. Across 6 years with reported emissions, the highest was 2019 (8,104 t) and the lowest 2023 (1,007 t). Its efficiency percentile within the type went from 24 in 2018 to 14 in 2024 (lower is more efficient). Of the 3 comparable vessels listed below with a 2024 return, 0 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 year2018–2025
| 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 | 4,138 | 1,316 | 17,056 | 2,239 | 223 | 242.6 | 8.9 | 14 |
| 2023 | 1,007 | 320 | 3,739 | 297 | 0 | 269.2 | 7.3 | 3 |
| 2022 | 7,373 | 2,348 | 22,563 | 1,931 | 1,047 | 326.8 | 11.6 | 27 |
| 2020 | 3,640 | 1,145 | 8,307 | 725 | 1,177 | 438.1 | 15.3 | 48 |
| 2019 | 8,104 | 2,585 | 28,244 | 2,328 | 829 | 286.9 | 8.3 | 6 |
| 2018 | 7,251 | 2,312 | 23,120 | 2,173 | 206 | 313.6 | 11.5 | 24 |
Vessel particulars
- IMO number
- 9676515
- Previously reported as
- WONDER MAIA
- Ship type
- Chemical tanker
- Gross tonnage
- 30,263
- Length overall
- 183.1 m
- Year built
- 2014
- Flag state
- Marshall Islands 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. - Port of registry
- Monrovia MRV 2024
- Technical efficiency (design)
- EEDI (4.31 gCO₂/t·nm)
- Verifier
- HELLENIC LLOYD'S S.A., Greece
- Accreditation
- 1190
- Compliance document issued
- 2025-04-15
- Compliance document expires
- 2026-06-30
Efficiency against its own type2024
Position 165 of 1,194 qualifying chemical tankers by EEOI, at the 14th percentile. The dashed line is the type median, 15.9; this vessel reported 8.9.
EEOI divides emissions by transport work, which for this vessel and year was 462,392,179 tonne-miles over 17,056 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2024 was 42.9% lower than in 2018, for EU/EEA voyages only. No return is recorded for 2021, so the series has gaps.
From 2023 to 2024, emissions rose 311.1% while distance sailed rose 356.2%and CO₂ per nautical mile fell 9.9%.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
- 4,203 t
- Methane (CH₄)
- 0.07 t
- Nitrous oxide (N₂O)
- 0.24 t
- Under EU ETS
- 2,240 t, 54% 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 |
| 2025 | Bureau Veritas Certification France | 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 7 MRV reporting years, an efficiency ranking, 4 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.