Chemical tanker · Liberia flag
BW HELIUM: CO₂ emissions 2018–2025
IMO 9740794 MMSI 636019177EU ETS8 reporting years
- CO₂ reported 2025
- 8,863 t
- Fuel burned
- 2,831 t
- Time at sea
- 4,208 h
- Emitted at berth
- 4% of total
- Share of year under way
- 48%
BW HELIUM against its type
It is one of 402 chemical tankers here under the Liberia flag, 17.2% of the 2,344 on the register. Its MRV returns name it BW HELIUM for 2018 and LAVENDER RAY for 2019–2025. The reported port of registry changed: Douglas (2018), then Monrovia (2019–2025).
Its 8,863 t of CO₂ for 2025 is 1.6 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 186.5 kg CO₂, 25% below the type median of 250.2 kg. It logged 4,208 hours at sea against a median of 2,106 hours for its type that year. 4.0% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 8 years with reported emissions, the highest was 2024 (9,681 t) and the lowest 2019 (3,455 t). Its efficiency percentile within the type went from 33 in 2018 to 48 in 2024 (lower is more efficient). Of the 7 comparable vessels listed below with a 2025 return, 1 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 | 8,863 | 2,831 | — | 4,208 | 351 | 186.5 | 0.0 | not ranked |
| 2024 | 9,681 | 3,087 | 48,890 | 4,320 | 765 | 198.0 | 15.5 | 48 |
| 2023 | 4,385 | 1,394 | 22,568 | 1,955 | 359 | 194.3 | 13.9 | 41 |
| 2022 | 5,307 | 1,673 | 25,913 | 2,249 | 937 | 204.8 | 14.8 | 45 |
| 2021 | 5,077 | 1,601 | 26,208 | 2,250 | 676 | 193.7 | 16.0 | 49 |
| 2020 | 4,072 | 1,288 | 20,869 | 1,652 | 294 | 195.1 | 16.7 | 55 |
| 2019 | 3,455 | 1,096 | 18,788 | 1,708 | 320 | 183.9 | 13.5 | 34 |
| 2018 | 6,022 | 1,926 | 29,556 | 3,406 | 487 | 203.7 | 13.1 | 33 |
Vessel particulars
- IMO number
- 9740794
- Previously reported as
- LAVENDER RAY
- MMSI
- 636019177
- Call sign
- D5TH4
- Ship type
- Chemical tanker
- Length overall
- 146.0 m
- Beam
- 24.0 m
- Flag state
- Liberia per EU MRV 2025
- Port of registry
- Monrovia MRV 2025
- Technical efficiency (design)
- EEXI (7.04 gCO₂/t·nm)
- Efficiency ranking
- Not ranked: cargo above the plausible ceiling (2025)
- Verifier
- HELLENIC LLOYD'S S.A., Greece
- Accreditation
- 1190
- Compliance document issued
- 2026-03-27
- Compliance document expires
- 2027-06-30
Reported CO₂ by year
Reported CO₂ in 2025 was 47.2% higher than in 2018, for EU/EEA voyages only.
From 2024 to 2025, emissions fell 8.5% and CO₂ per nautical mile fell 5.8%.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
- 9,002 t
- Methane (CH₄)
- 0.14 t
- Nitrous oxide (N₂O)
- 0.51 t
- Under EU ETS
- 5,324 t, 60% of total
Laden voyages2025
- CO₂ on laden voyages
- 8,491 t, 96% of total
- Fuel, laden
- 2,698 t
- CO₂ per nm, laden
- 192.3 kg
The rest of the 2025 total was emitted on ballast legs or at berth.
Observed movementsAIS · Norwegian waters
- First seen
- 18 Nov 2025
- Last seen
- 18 Nov 2025
- Days observed
- 1
- Positions
- 59
- Median speed
- 11.9 kn
Its recorded positions span 58.0°N to 58.6°N and 4.5°E to 5.9°E.
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 | DNV | Germany |
| 2019 | Lloyd's Register Quality Assurance Ltd | United Kingdom |
| 2020 | AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD) | Greece |
| 2023 | HELLENIC LLOYD'S S.A. | Greece |
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.
- Movements: Norwegian Coastal Administration open AIS extract.
This page draws on 8 MRV reporting years, 2 of 5 vessel particulars, AIS movements in Norwegian waters and a name history. Not found in the sources for this vessel: an efficiency ranking, 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.