Container ship · Liberia flag · built 2008
AS ALVA: CO₂ emissions 2019–2025
IMO 9337030 EU ETS4 reporting years
- CO₂ reported 2025
- 1,979 t
- Fuel burned
- 635 t
- Time at sea
- 545 h
- Emitted at berth
- 1% of total
- Share of year under way
- 6%
- Gross tonnage
- 23,633
AS ALVA against its type
Built in 2008, it is the same age as the median container ship on this register (build year 2008, 3,088 vessels with a known build year). At 23,633 gross tonnage it is smaller than 74% of the other 3,000 container ships with a recorded tonnage. It is one of 976 container ships here under the Liberia flag, 27.9% of the 3,495 on the register. Its MRV returns name it SONGA IRIDIUM for 2019–2020 and AS ALVA for 2021–2025. The returns for 2019–2025 all give Monrovia as port of registry.
Its 1,979 t of CO₂ for 2025 is 88% below the median of 16,359 t among the 2,234 container ships on this register that reported for 2025. Per nautical mile it emitted 366.9 kg CO₂, 33% below the type median of 545.6 kg. It logged 545 hours at sea against a median of 3,155 hours for its type that year. 1.1% of its 2025 emissions were at berth; the median for container ships was 3.2%. Across 4 years with reported emissions, the highest was 2020 (12,911 t) and the lowest 2025 (1,979 t). Its efficiency percentile within the type went from 72 in 2019 to 70 in 2021 (lower is more efficient). Of the 3 comparable vessels listed below with a 2025 return, 3 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 | 1,979 | 635 | — | 545 | 22 | 366.9 | 25.4 | not ranked |
| 2021 | 8,858 | 2,836 | 23,308 | 2,006 | 699 | 380.0 | 23.7 | 70 |
| 2020 | 12,911 | 4,085 | 30,998 | 2,639 | 160 | 416.5 | 39.9 | 89 |
| 2019 | 6,038 | 1,931 | 15,169 | 1,849 | 587 | 398.1 | 25.9 | 72 |
Vessel particulars
- IMO number
- 9337030
- Previously reported as
- SONGA IRIDIUM
- Ship type
- Container ship
- Gross tonnage
- 23,633
- Length overall
- 191.0 m
- Beam
- 28.5 m
- Year built
- 2008
- Flag state
- Liberia per EU MRV 2025
- Port of registry
- Monrovia MRV 2025
- Technical efficiency (design)
- EEXI (17.88 gCO₂/t·nm)
- Efficiency ranking
- Not ranked: transport work below the floor (2025)
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2026-02-12
- Compliance document expires
- 2027-06-30
Reported CO₂ by year
Reported CO₂ in 2025 was 67.2% lower than in 2019, for EU/EEA voyages only. No return is recorded for 2022, 2023, 2024, so the series has gaps.
From 2021 to 2025, emissions fell 77.7% and CO₂ per nautical mile fell 3.5%.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
- 2,010 t
- Methane (CH₄)
- 0.03 t
- Nitrous oxide (N₂O)
- 0.11 t
- Under EU ETS
- 1,000 t, 51% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2019 | AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD) | Greece |
| 2020 | Korean Register | Korea, Republic of |
| 2021 | 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 2019–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0).
This page draws on 4 MRV reporting years, 4 of 5 vessel particulars and a name history. Not found in the sources for this vessel: an efficiency ranking, 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.