Container ship · Portugal flag · built 2012
HELENA: CO₂ emissions 2019–2025
IMO 9584487 EU ETS7 reporting years
- CO₂ reported 2025
- 16,512 t
- Fuel burned
- 5,266 t
- Distance
- 64,813 nm
- Time at sea
- 5,414 h
- Emitted at berth
- 4% of total
- Share of year under way
- 62%
- Gross tonnage
- 10,318
.jpg){kind=link}
HELENA against its type
Built in 2012, it is 4 years newer than the median container ship on this register, which was built in 2008 (3,088 vessels with a known build year). At 10,318 gross tonnage it is smaller than 88% of the other 3,000 container ships with a recorded tonnage. It is one of 307 container ships here under the Portugal flag, 8.8% of the 3,495 on the register. Its MRV returns name it HELENA SCHEPERS for 2019–2024 and HELENA for 2025. The reported port of registry changed: Limasol (2019), then Limassol (2020), then Madeira (2021–2025).
Its 16,512 t of CO₂ for 2025 is close to the median of 16,359 t among the 2,234 container ships on this register that reported for 2025. Per nautical mile it emitted 254.8 kg CO₂, 53% below the type median of 545.6 kg. It logged 5,414 hours at sea against a median of 3,155 hours for its type that year. 3.7% of its 2025 emissions were at berth; the median for container ships was 3.2%. Across 7 years with reported emissions, the highest was 2025 (16,512 t) and the lowest 2024 (12,277 t). Its efficiency percentile within the type went from 86 in 2019 to 94 in 2025 (lower is more efficient). Of the 6 comparable vessels listed below with a 2025 return, 2 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2019–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 16,512 | 5,266 | 64,813 | 5,414 | 609 | 254.8 | 43.7 | 94 |
| 2024 | 12,277 | 3,878 | 47,431 | 4,933 | 692 | 258.8 | 38.4 | 89 |
| 2023 | 14,906 | 4,721 | 53,506 | 4,730 | 803 | 278.6 | 33.8 | 82 |
| 2022 | 12,676 | 3,973 | 48,360 | 3,944 | 966 | 262.1 | 37.5 | 86 |
| 2021 | 15,648 | 4,912 | 56,166 | 4,495 | 801 | 278.6 | 35.4 | 85 |
| 2020 | 13,894 | 4,378 | 45,800 | 3,807 | 2,053 | 303.4 | 43.5 | 91 |
| 2019 | 16,511 | 5,217 | 55,206 | 5,238 | 1,259 | 299.1 | 38.1 | 86 |
Vessel particulars
- IMO number
- 9584487
- Previously reported as
- HELENA SCHEPERS
- Ship type
- Container ship
- Gross tonnage
- 10,318
- Length overall
- 151.7 m
- Year built
- 2012
- Flag state
- Portugal per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list Cyprus. The flag shown is from the newest official source, the EU MRV return for 2025. - Port of registry
- Madeira MRV 2025
- Home port
- Madeira
- Ice class
- IA
- Technical efficiency (design)
- EEXI (22.1 gCO₂/t·nm)
- Verifier
- EnvService GmbH, Germany
- Accreditation
- D-VS-20809-01-00
- Compliance document issued
- 2026-02-19
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 1,727 of 1,838 qualifying container ships by EEOI, at the 94th percentile. The dashed line is the type median, 14.2; this vessel reported 43.7.
EEOI divides emissions by transport work, which for this vessel and year was 377,773,507 tonne-miles over 64,813 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was <0.1% higher than in 2019, for EU/EEA voyages only.
From 2024 to 2025, emissions rose 34.5% while distance sailed rose 36.6%and CO₂ per nautical mile fell 1.6%.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
- 16,771 t
- Methane (CH₄)
- 0.26 t
- Nitrous oxide (N₂O)
- 0.95 t
- Under EU ETS
- 2,174 t, 13% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2019 | Bureau Veritas Certification France | France |
| 2020 | DNV | Germany |
| 2024 | Swiss Climate EcoCare GmbH | Germany |
| 2025 | EnvService GmbH | 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 2019–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0) and Wikimedia Commons.
This page draws on 7 MRV reporting years, an efficiency ranking, 4 of 5 vessel particulars, a name history and a licensed photograph. Not found in the sources for this vessel: AIS movements in Norwegian waters, 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.