Oil tanker · Marshall Islands flag
MARLIN HERA: CO₂ emissions 2018–2025
IMO 9729221 EU ETS6 reporting years
- CO₂ reported 2025
- 7,520 t
- Fuel burned
- 2,391 t
- Distance
- 27,230 nm
- Time at sea
- 2,434 h
- Emitted at berth
- 5% of total
- Share of year under way
- 28%
MARLIN HERA against its type
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 NORD LARKSPUR for 2018–2020 and MARLIN HERA for 2022–2025. The reported port of registry changed: Manila (2018–2020), then Majuro (2022–2025).
Its 7,520 t of CO₂ for 2025 is close to the median of 7,922 t among the 1,704 oil tankers on this register that reported for 2025. Per nautical mile it emitted 276.2 kg CO₂, 32% below the type median of 403.2 kg. It logged 2,434 hours at sea against a median of 2,030 hours for its type that year. 4.9% of its 2025 emissions were at berth; the median for oil tankers was 7.8%. Across 6 years with reported emissions, the highest was 2025 (7,520 t) and the lowest 2020 (1,479 t). Its efficiency percentile within the type went from 22 in 2018 to 55 in 2025 (lower is more efficient). Of the 8 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 | 7,520 | 2,391 | 27,230 | 2,434 | 371 | 276.2 | 7.8 | 55 |
| 2023 | 2,926 | 937 | 9,904 | 870 | 119 | 295.4 | 7.4 | 45 |
| 2022 | 1,515 | 483 | 5,137 | 436 | 118 | 294.9 | 5.7 | 21 |
| 2020 | 1,479 | 468 | — | 376 | 540 | 423.3 | 10.0 | not ranked |
| 2019 | 3,085 | 988 | 10,639 | 980 | 8 | 290.0 | 5.1 | 14 |
| 2018 | 1,662 | 532 | 5,746 | 469 | 92 | 289.3 | 5.7 | 22 |
Vessel particulars
- IMO number
- 9729221
- Previously reported as
- NORD LARKSPUR
- Ship type
- Oil tanker
- Flag state
- Marshall Islands per EU MRV 2025
- Port of registry
- Majuro MRV 2025
- Technical efficiency (design)
- EEXI (3.85 gCO₂/t·nm)
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2026-02-18
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 795 of 1,448 qualifying oil tankers by EEOI, at the 55th 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 961,608,696 tonne-miles over 27,230 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 352.4% higher than in 2018, for EU/EEA voyages only. No return is recorded for 2021, 2024, so the series has gaps.
From 2023 to 2025, emissions rose 157.0% while distance sailed rose 174.9%and CO₂ per nautical mile fell 6.5%.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
- 7,637 t
- Methane (CH₄)
- 0.12 t
- Nitrous oxide (N₂O)
- 0.43 t
- Under EU ETS
- 3,881 t, 52% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | Bureau Veritas Certification France | France |
| 2022 | 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.
This page draws on 6 MRV reporting years, an efficiency ranking, 1 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.