Oil tanker · Marshall Islands flag · built 2008
HANSA TROMSOE: CO₂ emissions 2018–2025
IMO 9366287 EU ETS5 reporting years
- CO₂ reported 2025
- 6,061 t
- Fuel burned
- 1,928 t
- Distance
- 21,029 nm
- Time at sea
- 1,904 h
- Emitted at berth
- 6% of total
- Share of year under way
- 22%
- Gross tonnage
- 29,733
HANSA TROMSOE against its type
Built in 2008, it is 2 years older than the median oil tanker on this register, which was built in 2010 (2,896 vessels with a known build year). At 29,733 gross tonnage it is smaller than 75% of the other 2,841 oil tankers with a recorded tonnage. It is one of 793 oil tankers here under the Marshall Islands flag, 22.4% of the 3,548 on the register. Its MRV returns name it HIGH MERCURY for 2018–2021 and HANSA TROMSOE for 2025. The reported port of registry changed: Hong Kong (2018–2021), then Majuro (2025).
Its 6,061 t of CO₂ for 2025 is 23% 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 288.2 kg CO₂, 29% below the type median of 403.2 kg. It logged 1,904 hours at sea against a median of 2,030 hours for its type that year. 5.8% of its 2025 emissions were at berth; the median for oil tankers was 7.8%. Across 5 years with reported emissions, the highest was 2019 (6,628 t) and the lowest 2018 (2,636 t). Its efficiency percentile within the type went from 10 in 2018 to 67 in 2025 (lower is more efficient). Of the 4 comparable vessels 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 | 6,061 | 1,928 | 21,029 | 1,904 | 350 | 288.2 | 9.2 | 67 |
| 2021 | 3,380 | 1,064 | 13,480 | 1,100 | 159 | 250.8 | 11.0 | 20 |
| 2020 | 3,039 | 963 | 11,613 | 1,055 | 78 | 261.7 | 14.6 | 43 |
| 2019 | 6,628 | 2,111 | 21,271 | 1,820 | 766 | 311.6 | 13.9 | 35 |
| 2018 | 2,636 | 839 | 7,502 | 812 | 449 | 351.3 | 9.2 | 10 |
Vessel particulars
- IMO number
- 9366287
- Previously reported as
- HIGH MERCURY
- Ship type
- Oil tanker
- Gross tonnage
- 29,733
- Length overall
- 183.0 m
- Year built
- 2008
- Flag state
- Marshall Islands per EU MRV 2025
- Port of registry
- Majuro MRV 2025
- Technical efficiency (design)
- EEXI (4.89 gCO₂/t·nm)
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2026-05-06
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 975 of 1,448 qualifying oil tankers by EEOI, at the 67th percentile. The dashed line is the type median, 7.5; this vessel reported 9.2.
EEOI divides emissions by transport work, which for this vessel and year was 657,420,824 tonne-miles over 21,029 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 130.0% higher than in 2018, for EU/EEA voyages only. No return is recorded for 2022, 2023, 2024, so the series has gaps.
From 2021 to 2025, emissions rose 79.3% while distance sailed rose 56.0%and CO₂ per nautical mile rose 14.9%.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
- 6,156 t
- Methane (CH₄)
- 0.10 t
- Nitrous oxide (N₂O)
- 0.35 t
- Under EU ETS
- 3,326 t, 55% of total
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 |
| 2025 | DNV | Germany |
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).
This page draws on 5 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.