Container ship · Portugal flag · built 2012
CONMAR AVENUE: CO₂ emissions 2018–2025
IMO 9483358 EU ETS8 reporting years
- CO₂ reported 2025
- 19,347 t
- Fuel burned
- 6,201 t
- Distance
- 78,358 nm
- Time at sea
- 6,624 h
- Emitted at berth
- 4% of total
- Share of year under way
- 76%
- Gross tonnage
- 10,585
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CONMAR AVENUE 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 10,585 gross tonnage it is smaller than 87% 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 CONMAR AVENUE for 2018–2021, ISABELLA for 2022 and ISABELLA B for 2023–2025. The reported port of registry changed: St. John's (2018–2021), then Madeira (2022–2025).
Its 19,347 t of CO₂ for 2025 is 18% above the median of 16,359 t among the 2,234 container ships on this register that reported for 2025. Per nautical mile it emitted 246.9 kg CO₂, 55% below the type median of 545.6 kg. It logged 6,624 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 8 years with reported emissions, the highest was 2021 (22,093 t) and the lowest 2023 (15,816 t). Its efficiency percentile within the type went from 86 in 2018 to 96 in 2025 (lower is more efficient). Of the 7 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 | 19,347 | 6,201 | 78,358 | 6,624 | 720 | 246.9 | 47.8 | 96 |
| 2024 | 17,495 | 5,609 | 70,490 | 6,113 | 664 | 248.2 | 47.6 | 94 |
| 2023 | 15,816 | 5,067 | 67,004 | 5,460 | 1,074 | 236.0 | 44.9 | 90 |
| 2022 | 17,636 | 5,644 | 64,588 | 4,938 | 715 | 273.1 | 36.7 | 85 |
| 2021 | 22,093 | 7,054 | 76,551 | 5,460 | 929 | 288.6 | 39.1 | 88 |
| 2020 | 17,957 | 5,730 | 65,202 | 5,065 | 859 | 275.4 | 44.7 | 92 |
| 2019 | 17,699 | 5,642 | 64,823 | 5,874 | 517 | 273.0 | 37.3 | 85 |
| 2018 | 19,387 | 6,173 | 70,317 | 5,975 | 1,017 | 275.7 | 40.5 | 86 |
Vessel particulars
- IMO number
- 9483358
- Previously reported as
- ISABELLA, ISABELLA B
- Ship type
- Container ship
- Gross tonnage
- 10,585
- Length overall
- 151.7 m
- Year built
- 2012
- Flag state
- Portugal per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list Antigua and Barbuda. The flag shown is from the newest official source, the EU MRV return for 2025. - Port of registry
- Madeira MRV 2025
- Ice class
- IA
- Technical efficiency (design)
- EEXI (22.12 gCO₂/t·nm)
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2026-02-10
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 1,759 of 1,838 qualifying container ships by EEOI, at the 96th percentile. The dashed line is the type median, 14.2; this vessel reported 47.8.
EEOI divides emissions by transport work, which for this vessel and year was 405,165,236 tonne-miles over 78,358 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 0.2% lower than in 2018, for EU/EEA voyages only.
From 2024 to 2025, emissions rose 10.6% while distance sailed rose 11.2%and CO₂ per nautical mile fell 0.5%.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
- 19,651 t
- Methane (CH₄)
- 0.31 t
- Nitrous oxide (N₂O)
- 1.12 t
- Under EU ETS
- 8,350 t, 43% 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.
- Vessel particulars: Wikidata (CC0) and Wikimedia Commons.
This page draws on 8 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.