Oil tanker · Greece flag · built 2017
MARAN HELEN: CO₂ emissions 2018–2025
IMO 9779381 EU ETS6 reporting years
- CO₂ reported 2025
- 18,408 t
- Fuel burned
- 5,852 t
- Distance
- 41,797 nm
- Time at sea
- 4,302 h
- Emitted at berth
- 9% of total
- Share of year under way
- 49%
- Gross tonnage
- 84,000
MARAN HELEN against its type
Built in 2017, it is 7 years newer than the median oil tanker on this register, which was built in 2010 (2,896 vessels with a known build year). At 84,000 gross tonnage it is larger than 82% of the other 2,841 oil tankers with a recorded tonnage. It is one of 215 oil tankers here under the Greece flag, 6.1% of the 3,548 on the register. The same builder is recorded for 660 other vessels here, 159 of them oil tankers. The returns for 2018–2025 all give Piraeus as port of registry.
Its 18,408 t of CO₂ for 2025 is 2.3 times the median of 7,922 t among the 1,704 oil tankers on this register that reported for 2025. Per nautical mile it emitted 440.4 kg CO₂, close to the type median of 403.2 kg. It logged 4,302 hours at sea against a median of 2,030 hours for its type that year. 9.1% of its 2025 emissions were at berth; the median for oil tankers was 7.8%. Across 6 years with reported emissions, the highest was 2024 (22,994 t) and the lowest 2019 (2,356 t). Its efficiency percentile within the type went from 0 in 2018 to 39 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 | 18,408 | 5,852 | 41,797 | 4,302 | 1,671 | 440.4 | 6.7 | 39 |
| 2024 | 22,994 | 7,288 | 46,770 | 4,900 | 2,835 | 491.6 | 6.5 | 35 |
| 2023 | 4,533 | 1,439 | 9,376 | 748 | 1,273 | 483.5 | 10.2 | 69 |
| 2022 | 13,463 | 4,289 | 31,450 | 3,151 | 1,886 | 428.1 | 5.0 | 14 |
| 2019 | 2,356 | 754 | 6,236 | 663 | 329 | 377.9 | 4.8 | 11 |
| 2018 | 5,275 | 1,686 | 11,674 | 1,781 | 697 | 451.9 | 1.0 | 0 |
Vessel particulars
- IMO number
- 9779381
- Ship type
- Oil tanker
- Gross tonnage
- 84,000
- Length overall
- 274.0 m
- Year built
- 2017
- Flag state
- Greece per EU MRV 2025
- Builder
- Hanwha Ocean
- Port of registry
- Piraeus MRV 2025
- Home port
- Piraeus
- Technical efficiency (design)
- EEDI (2.65 gCO₂/t·nm)
- Verifier
- AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD), Greece
- Accreditation
- 1083-2
- Compliance document issued
- 2026-03-23
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 568 of 1,448 qualifying oil tankers by EEOI, at the 39th percentile. The dashed line is the type median, 7.5; this vessel reported 6.7.
EEOI divides emissions by transport work, which for this vessel and year was 2,755,673,653 tonne-miles over 41,797 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 248.9% higher than in 2018, for EU/EEA voyages only. No return is recorded for 2020, 2021, so the series has gaps.
From 2024 to 2025, emissions fell 19.9% while distance sailed fell 10.6%and CO₂ per nautical mile fell 10.4%.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 18,695 t
- Methane (CH₄)
- 0.29 t
- Nitrous oxide (N₂O)
- 1.05 t
- Under EU ETS
- 10,039 t, 55% of total
Laden voyages2025
- CO₂ on laden voyages
- 10,149 t, 55% of total
- Fuel, laden
- 3,237 t
- CO₂ per nm, laden
- 415.0 kg
The rest of the 2025 total was emitted on ballast legs or at berth.
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | Lloyd's Register Quality Assurance Ltd | United Kingdom |
| 2019 | HELLENIC LLOYD'S S.A. | Greece |
| 2022 | AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD) | 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.
- Vessel particulars: Wikidata (CC0).
This page draws on 6 MRV reporting years, an efficiency ranking and 5 of 5 vessel particulars. Not found in the sources for this vessel: AIS movements in Norwegian waters, a name history, 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.