Chemical tanker · Marshall Islands flag · built 2016
BRITISH CUMULUS: CO₂ emissions 2018–2025
IMO 9724532 EU ETS8 reporting years
- CO₂ reported 2025
- 12,478 t
- Fuel burned
- 3,943 t
- Distance
- 39,642 nm
- Time at sea
- 4,421 h
- Emitted at berth
- 20% of total
- Share of year under way
- 50%
- Gross tonnage
- 27,659
BRITISH CUMULUS 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 27,659 gross tonnage it is larger than 65% 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 983 other vessels here, 330 of them chemical tankers. Its MRV returns name it BRITISH CUMULUS for 2018–2019, MAERSK CUMULUS for 2020–2021 and SEA CUMULUS for 2022–2025. The reported port of registry changed: Douglas (2018–2019), then Svendborg (2020–2021), then MAJURO (2022–2025).
Its 12,478 t of CO₂ for 2025 is 2.3 times the median of 5,531 t among the 1,484 chemical tankers on this register that reported for 2025. Per nautical mile it emitted 314.8 kg CO₂, 26% above the type median of 250.2 kg. It logged 4,421 hours at sea against a median of 2,106 hours for its type that year. 19.7% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 8 years with reported emissions, the highest was 2018 (15,648 t) and the lowest 2023 (5,659 t). Its efficiency percentile within the type went from 49 in 2018 to 65 in 2025 (lower is more efficient). Of the 6 sister ships listed below with a 2025 return, 6 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 | 12,478 | 3,943 | 39,642 | 4,421 | 2,454 | 314.8 | 18.7 | 65 |
| 2024 | 10,808 | 3,428 | 37,033 | 4,251 | 1,727 | 291.8 | 18.5 | 59 |
| 2023 | 5,659 | 1,794 | 23,781 | 2,339 | 401 | 238.0 | 15.1 | 48 |
| 2022 | 12,076 | 3,831 | 40,444 | 3,308 | 3,439 | 298.6 | 17.3 | 57 |
| 2021 | 11,669 | 3,687 | 43,874 | 3,796 | 1,717 | 266.0 | 14.5 | 42 |
| 2020 | 14,963 | 4,765 | 36,065 | 3,703 | 1,274 | 414.9 | 54.5 | 97 |
| 2019 | 11,910 | 3,803 | 26,550 | 3,964 | 1,178 | 448.6 | 32.6 | 85 |
| 2018 | 15,648 | 4,919 | 49,640 | 6,488 | 2,308 | 315.2 | 16.4 | 49 |
Vessel particulars
- IMO number
- 9724532
- Previously reported as
- MAERSK CUMULUS, SEA CUMULUS
- Ship type
- Chemical tanker
- Gross tonnage
- 27,659
- Length overall
- 183.0 m
- Beam
- 32.0 m
- Year built
- 2016
- Flag state
- Marshall Islands per EU MRV 2025
- Builder
- HD Hyundai Mipo
- Port of registry
- MAJURO MRV 2025
- Ice class
- IB
- Technical efficiency (design)
- EEDI (5.33 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 874 of 1,348 qualifying chemical tankers by EEOI, at the 65th percentile. The dashed line is the type median, 14.4; this vessel reported 18.7.
EEOI divides emissions by transport work, which for this vessel and year was 667,615,302 tonne-miles over 39,642 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 20.3% lower than in 2018, for EU/EEA voyages only.
From 2024 to 2025, emissions rose 15.5% while distance sailed rose 7.0%and CO₂ per nautical mile rose 7.9%.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 12,671 t
- Methane (CH₄)
- 0.20 t
- Nitrous oxide (N₂O)
- 0.71 t
- Under EU ETS
- 7,403 t, 59% of total
Laden voyages2025
- CO₂ on laden voyages
- 5,625 t, 45% of total
- Fuel, laden
- 1,781 t
- CO₂ per nm, laden
- 241.5 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 8 MRV reporting years, an efficiency ranking, 5 of 5 vessel particulars and a name history. Not found in the sources for this vessel: AIS movements in Norwegian waters, 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.