Oil tanker · Singapore flag · built 2014
BW LIONESS: CO₂ emissions 2018–2025
IMO 9675509 EU ETS8 reporting years
- CO₂ reported 2025
- 6,046 t
- Fuel burned
- 1,929 t
- Distance
- 22,478 nm
- Time at sea
- 2,103 h
- Emitted at berth
- 6% of total
- Share of year under way
- 24%
- Gross tonnage
- 29,737
BW LIONESS against its type
Built in 2014, it is 4 years newer than the median oil tanker on this register, which was built in 2010 (2,896 vessels with a known build year). At 29,737 gross tonnage it is smaller than 75% of the other 2,841 oil tankers with a recorded tonnage. It is one of 237 oil tankers here under the Singapore flag, 6.7% of the 3,548 on the register. The same builder is recorded for 180 other vessels here, 51 of them oil tankers. Its MRV returns name it BW LIONESS for 2018–2022 and HAFNIA LIONESS for 2023–2025. The returns for 2018–2025 all give Singapore as port of registry.
Its 6,046 t of CO₂ for 2025 is 24% below the median of 7,922 t among the 1,704 oil tankers on this register that reported for 2025. Per nautical mile it emitted 269.0 kg CO₂, 33% below the type median of 403.2 kg. It logged 2,103 hours at sea against a median of 2,030 hours for its type that year. 6.1% of its 2025 emissions were at berth; the median for oil tankers was 7.8%. Across 8 years with reported emissions, the highest was 2018 (10,012 t) and the lowest 2024 (3,888 t). Its efficiency percentile within the type went from 44 in 2018 to 54 in 2025 (lower is more efficient). Of the 4 sister ships listed below with a 2025 return, 2 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 | 6,046 | 1,929 | 22,478 | 2,103 | 370 | 269.0 | 7.8 | 54 |
| 2024 | 3,888 | 1,240 | 15,748 | 1,424 | 157 | 246.9 | 7.0 | 43 |
| 2023 | 8,875 | 2,833 | 33,526 | 3,070 | 567 | 264.7 | 10.2 | 69 |
| 2022 | 6,982 | 2,228 | 30,749 | 2,577 | 642 | 227.1 | 10.7 | 71 |
| 2021 | 9,619 | 3,037 | 36,471 | 3,076 | 920 | 263.8 | 11.0 | 70 |
| 2020 | 5,523 | 1,750 | 24,439 | 2,079 | 139 | 226.0 | 11.2 | 67 |
| 2019 | 7,256 | 2,300 | 30,445 | 2,728 | 462 | 238.3 | 11.7 | 73 |
| 2018 | 10,012 | 3,199 | 33,301 | 3,811 | 383 | 300.6 | 8.0 | 44 |
Vessel particulars
- IMO number
- 9675509
- Previously reported as
- HAFNIA LIONESS
- Ship type
- Oil tanker
- Gross tonnage
- 29,737
- Length overall
- 183.0 m
- Year built
- 2014
- Flag state
- Singapore per EU MRV 2025
- Builder
- SPP Shipbuilding Co., Ltd.
- Port of registry
- Singapore MRV 2025
- Technical efficiency (design)
- EEXI (4.12 gCO₂/t·nm)
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2026-02-16
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 783 of 1,448 qualifying oil tankers by EEOI, at the 54th percentile. The dashed line is the type median, 7.5; this vessel reported 7.8.
EEOI divides emissions by transport work, which for this vessel and year was 779,150,773 tonne-miles over 22,478 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 39.6% lower than in 2018, for EU/EEA voyages only.
From 2024 to 2025, emissions rose 55.5% while distance sailed rose 42.7%and CO₂ per nautical mile rose 8.9%.That points mainly to how much the vessel sailed, rather than the other.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 6,141 t
- Methane (CH₄)
- 0.10 t
- Nitrous oxide (N₂O)
- 0.35 t
- Under EU ETS
- 3,499 t, 58% of total
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.