Oil tanker · Singapore flag · built 2019
BW THALASSA: CO₂ emissions 2020–2025
IMO 9800324 EU ETS6 reporting years
- CO₂ reported 2025
- 11,397 t
- Fuel burned
- 3,623 t
- Distance
- 32,238 nm
- Time at sea
- 3,018 h
- Emitted at berth
- 12% of total
- Share of year under way
- 34%
- Gross tonnage
- 62,000
BW THALASSA against its type
Built in 2019, it is 9 years newer than the median oil tanker on this register, which was built in 2010 (2,896 vessels with a known build year). At 62,000 gross tonnage it is larger than 57% 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 53 other vessels here, 37 of them oil tankers. Its MRV returns name it BW THALASSA for 2020–2022 and HAFNIA THALASSA for 2023–2025. The returns for 2020–2025 all give Singapore as port of registry.
Its 11,397 t of CO₂ for 2025 is 44% above the median of 7,922 t among the 1,704 oil tankers on this register that reported for 2025. Per nautical mile it emitted 353.5 kg CO₂, 12% below the type median of 403.2 kg. It logged 3,018 hours at sea against a median of 2,030 hours for its type that year. 11.5% of its 2025 emissions were at berth; the median for oil tankers was 7.8%. Across 6 years with reported emissions, the highest was 2020 (12,949 t) and the lowest 2023 (502 t). Its efficiency percentile within the type went from 6 in 2020 to 24 in 2025 (lower is more efficient). Of the 3 sister ships listed below with a 2025 return, 0 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2020–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 11,397 | 3,623 | 32,238 | 3,018 | 1,313 | 353.5 | 5.6 | 24 |
| 2024 | 2,481 | 786 | 4,580 | 501 | 260 | 541.8 | 6.0 | 31 |
| 2023 | 502 | 157 | — | 220 | 79 | 628.5 | 10.0 | not ranked |
| 2022 | 4,370 | 1,395 | 10,566 | 954 | 695 | 413.6 | 8.1 | 51 |
| 2021 | 9,446 | 3,018 | 25,881 | 2,241 | 714 | 365.0 | 4.7 | 10 |
| 2020 | 12,949 | 4,145 | 38,370 | 3,337 | 799 | 337.5 | 4.1 | 6 |
Vessel particulars
- IMO number
- 9800324
- Previously reported as
- HAFNIA THALASSA
- Ship type
- Oil tanker
- Gross tonnage
- 62,000
- Length overall
- 250.0 m
- Beam
- 44.0 m
- Year built
- 2019
- Flag state
- Singapore per EU MRV 2025
- Builder
- Daehan Shipbuilding
- Port of registry
- Singapore MRV 2025
- Technical efficiency (design)
- EEXI (3.33 gCO₂/t·nm)
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2026-03-01
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 353 of 1,448 qualifying oil tankers by EEOI, at the 24th percentile. The dashed line is the type median, 7.5; this vessel reported 5.6.
EEOI divides emissions by transport work, which for this vessel and year was 2,049,762,590 tonne-miles over 32,238 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 12.0% lower than in 2020, for EU/EEA voyages only.
From 2024 to 2025, emissions rose 359.3% while distance sailed rose 604.0%and CO₂ per nautical mile fell 34.8%.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
- 11,575 t
- Methane (CH₄)
- 0.18 t
- Nitrous oxide (N₂O)
- 0.65 t
- Under EU ETS
- 6,422 t, 56% of total
Sources and how to read this
- Emissions: EU MRV publication (THETIS-MRV), reporting years 2020–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0).
This page draws on 6 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.