Chemical tanker · Marshall Islands flag · built 2017
BRITISH OFFICER: CO₂ emissions 2022–2025
IMO 9724697 EU ETS3 reporting years
- CO₂ reported 2025
- 2,632 t
- Fuel burned
- 827 t
- Distance
- 8,610 nm
- Time at sea
- 704 h
- Emitted at berth
- 12% of total
- Share of year under way
- 8%
- Gross tonnage
- 30,948
BRITISH OFFICER against its type
Built in 2017, it is 7 years newer than the median chemical tanker on this register, which was built in 2010 (1,951 vessels with a known build year). At 30,948 gross tonnage it is larger than 97% 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 BRITISH OFFICER for 2022–2023 and KOKOLIGHT for 2025.
Its 2,632 t of CO₂ for 2025 is 52% 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 305.6 kg CO₂, 22% above the type median of 250.2 kg. It logged 704 hours at sea against a median of 2,106 hours for its type that year. 12.0% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 3 years with reported emissions, the highest was 2023 (3,558 t) and the lowest 2022 (1,353 t). Its efficiency percentile within the type went from 9 in 2022 to 33 in 2025 (lower is more efficient). Of the 7 comparable vessels listed below with a 2025 return, 4 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2022–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 2,632 | 827 | 8,610 | 704 | 315 | 305.6 | 11.6 | 33 |
| 2023 | 3,558 | 1,136 | — | 0 | 205 | 246.7 | 13.0 | not ranked |
| 2022 | 1,353 | 431 | 5,212 | 434 | 103 | 259.6 | 8.8 | 9 |
Vessel particulars
- IMO number
- 9724697
- Previously reported as
- KOKOLIGHT
- Ship type
- Chemical tanker
- Gross tonnage
- 30,948
- Length overall
- 183.0 m
- Beam
- 32.0 m
- Year built
- 2017
- Flag state
- Marshall Islands per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list United Kingdom. The flag shown is from the newest official source, the EU MRV return for 2025. - Port of registry
- Majuro MRV 2025
- Technical efficiency (design)
- EEXI (5.1 gCO₂/t·nm)
- Verifier
- Bureau Veritas Certification France, France
- Accreditation
- 3-2047 rev. 4
- Compliance document issued
- 2026-03-30
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 448 of 1,348 qualifying chemical tankers by EEOI, at the 33rd percentile. The dashed line is the type median, 14.4; this vessel reported 11.6.
EEOI divides emissions by transport work, which for this vessel and year was 227,253,886 tonne-miles over 8,610 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 94.5% higher than in 2022, for EU/EEA voyages only. No return is recorded for 2024, so the series has gaps.
From 2023 to 2025, emissions fell 26.0% and CO₂ per nautical mile rose 23.9%.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
- 2,672 t
- Methane (CH₄)
- 0.04 t
- Nitrous oxide (N₂O)
- 0.15 t
- Under EU ETS
- 1,067 t, 41% of total
Laden voyages2025
- CO₂ on laden voyages
- 383 t, 15% of total
- Fuel, laden
- 121 t
- CO₂ per nm, laden
- 270.9 kg
The rest of the 2025 total was emitted on ballast legs or at berth.
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2022 | AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD) | 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 2022–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0).
This page draws on 3 MRV reporting years, an efficiency ranking, 4 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.