Chemical tanker · Luxembourg flag · built 2018
BW MERCURY: CO₂ emissions 2018–2025
IMO 9815276 MMSI 253690000EU ETS8 reporting years
- CO₂ reported 2025
- 7,018 t
- Fuel burned
- 2,236 t
- Distance
- 29,428 nm
- Time at sea
- 2,558 h
- Emitted at berth
- 15% of total
- Share of year under way
- 29%
- Gross tonnage
- 11,918
BW MERCURY against its type
Built in 2018, it is 8 years newer than the median chemical tanker on this register, which was built in 2010 (1,951 vessels with a known build year). At 11,918 gross tonnage it is smaller than 71% of the other 1,899 chemical tankers with a recorded tonnage. It is one of 3 chemical tankers here under the Luxembourg flag, 0.1% of the 2,344 on the register. The same builder is recorded for 52 other vessels here, 48 of them chemical tankers. Its MRV returns name it BW MERCURY for 2018–2019 and CHEM MERCURY for 2020–2025. The reported port of registry changed: Douglas (2018–2019), then Luxembourg (2020–2025).
Its 7,018 t of CO₂ for 2025 is 27% above the median of 5,533 t among the 1,483 chemical tankers on this register that reported for 2025. Per nautical mile it emitted 238.5 kg CO₂, close to the type median of 250.2 kg. It logged 2,558 hours at sea against a median of 2,109 hours for its type that year. 15.3% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 8 years with reported emissions, the highest was 2020 (7,715 t) and the lowest 2019 (1,986 t). Its efficiency percentile within the type went from 23 in 2018 to 61 in 2025 (lower is more efficient). Of the 8 sister ships listed below with a 2025 return, 7 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 | 7,018 | 2,236 | 29,428 | 2,558 | 1,073 | 238.5 | 17.5 | 61 |
| 2024 | 6,319 | 2,002 | 30,730 | 2,770 | 5 | 205.6 | 14.7 | 46 |
| 2023 | 5,576 | 1,771 | 29,552 | 2,642 | 299 | 188.7 | 13.8 | 40 |
| 2022 | 3,851 | 1,224 | 18,913 | 1,908 | 471 | 203.6 | 18.4 | 60 |
| 2021 | 6,163 | 1,963 | 31,253 | 3,006 | 375 | 197.2 | 19.3 | 64 |
| 2020 | 7,715 | 2,426 | 41,414 | 3,630 | 949 | 186.3 | 13.1 | 33 |
| 2019 | 1,986 | 630 | 10,566 | 1,151 | 113 | 188.0 | 15.5 | 44 |
| 2018 | 3,046 | 971 | 14,975 | 1,658 | 119 | 203.4 | 11.3 | 23 |
Vessel particulars
- IMO number
- 9815276
- Previously reported as
- CHEM MERCURY
- MMSI
- 253690000
- Ship type
- Chemical tanker
- Gross tonnage
- 11,918
- Length overall
- 146.5 m
- Beam
- 24.0 m
- Year built
- 2018
- Flag state
- Luxembourg per EU MRV 2025
- Builder
- Fukuoka Shipbuilding
- Port of registry
- Luxembourg MRV 2025
- Technical efficiency (design)
- EEDI (6.96 gCO₂/t·nm)
- Verifier
- NORMEC VERIFAVIA SAS, France
- Accreditation
- 3-2127
- Compliance document issued
- 2026-03-16
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 828 of 1,348 qualifying chemical tankers by EEOI, at the 61st percentile. The dashed line is the type median, 14.4; this vessel reported 17.5.
EEOI divides emissions by transport work, which for this vessel and year was 401,710,361 tonne-miles over 29,428 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 130.4% higher than in 2018, for EU/EEA voyages only.
From 2024 to 2025, emissions rose 11.1% while distance sailed fell 4.2%and CO₂ per nautical mile rose 16.0%.That points mainly to how efficiently it sailed, rather than the other.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 7,128 t
- Methane (CH₄)
- 0.11 t
- Nitrous oxide (N₂O)
- 0.40 t
- Under EU ETS
- 4,362 t, 62% of total
Observed movementsAIS · Norwegian waters
- First seen
- 28 Oct 2025
- Last seen
- 31 Oct 2025
- Days observed
- 4
- Positions
- 521
- Median speed
- 1.5 kn
Its recorded positions span 58.0°N to 59.3°N and 9.1°E to 10.7°E.
76 hourly points from 521 positions. Filled circle first, open circle last; squares are ports for orientation, not calls.
Norwegian Coastal Administration open AIS, Norwegian waters only, 01 Jul 2025 to 27 Jul 2026. A gap means the vessel was not recorded here, not that it was idle or that a transponder was off.
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD) | Greece |
| 2020 | NORMEC VERIFAVIA SAS | 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).
- Movements: Norwegian Coastal Administration open AIS extract.
This page draws on 8 MRV reporting years, an efficiency ranking, 5 of 5 vessel particulars, AIS movements in Norwegian waters and a name history. Not found in the sources for this vessel: 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.