Gas carrier · Denmark flag · built 2013
HAPPY OSPREY: CO₂ emissions 2018–2025
IMO 9553646 EU ETS6 reporting years
- CO₂ reported 2025
- 5,815 t
- Fuel burned
- 1,859 t
- Distance
- 27,377 nm
- Time at sea
- 2,348 h
- Emitted at berth
- 2% of total
- Share of year under way
- 27%
- Gross tonnage
- 12,819
HAPPY OSPREY against its type
Built in 2013, it is the same age as the median gas carrier on this register (build year 2013, 530 vessels with a known build year). At 12,819 gross tonnage it is smaller than 74% of the other 525 gas carriers with a recorded tonnage. It is one of 17 gas carriers here under the Denmark flag, 2.5% of the 688 on the register. Its MRV returns name it JS GREENSUN for 2018 and HAPPY OSPREY for 2020–2025. The returns for 2020–2025 all give København as port of registry.
Its 5,815 t of CO₂ for 2025 is close to the median of 5,974 t among the 363 gas carriers on this register that reported for 2025. Per nautical mile it emitted 212.4 kg CO₂, 17% below the type median of 256.2 kg. It logged 2,348 hours at sea against a median of 1,943 hours for its type that year. 2.0% of its 2025 emissions were at berth; the median for gas carriers was 3.8%. Across 6 years with reported emissions, the highest was 2021 (8,956 t) and the lowest 2018 (1,833 t). Its efficiency percentile within the type went from 46 in 2018 to 87 in 2025 (lower is more efficient). Of the 4 comparable vessels listed below with a 2025 return, 0 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 | 5,815 | 1,859 | 27,377 | 2,348 | 116 | 212.4 | 88.2 | 87 |
| 2024 | 3,029 | 961 | — | 1,464 | 59 | 215.6 | 612.1 | not ranked |
| 2022 | 2,212 | 700 | 9,488 | 1,501 | 74 | 233.1 | 41.0 | 54 |
| 2021 | 8,956 | 2,853 | 46,982 | 4,817 | 392 | 190.6 | 55.2 | 65 |
| 2020 | 6,120 | 1,913 | — | 3,442 | 285 | 189.8 | 438.6 | not ranked |
| 2018 | 1,833 | 588 | 9,349 | 1,002 | 56 | 196.0 | 43.5 | 46 |
Vessel particulars
- IMO number
- 9553646
- Previously reported as
- JS GREENSUN
- Ship type
- Gas carrier
- Gross tonnage
- 12,819
- Length overall
- 142.0 m
- Beam
- 21.0 m
- Year built
- 2013
- Flag state
- Denmark per EU MRV 2025
- Port of registry
- København MRV 2025
- Home port
- København
- Technical efficiency (design)
- EEXI (11.2 gCO₂/t·nm)
- Verifier
- NORMEC VERIFAVIA SAS, France
- Accreditation
- 3-2127
- Compliance document issued
- 2026-03-31
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 255 of 292 qualifying gas carriers by EEOI, at the 87th percentile. The dashed line is the type median, 27.9; this vessel reported 88.2.
EEOI divides emissions by transport work, which for this vessel and year was 65,916,459 tonne-miles over 27,377 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 217.3% higher than in 2018, for EU/EEA voyages only. No return is recorded for 2019, 2023, so the series has gaps.
From 2024 to 2025, emissions rose 92.0% and CO₂ per nautical mile fell 1.5%.Distance is missing for at least one of the two years, so activity and efficiency cannot be separated here.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 5,906 t
- Methane (CH₄)
- 0.09 t
- Nitrous oxide (N₂O)
- 0.33 t
- Under EU ETS
- 3,809 t, 65% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | Bureau Veritas Certification France | France |
| 2020 | NORMEC VERIFAVIA SAS | France |
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, 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.