Chemical tanker · Liberia flag · built 2010
AYSEN STAR: CO₂ emissions 2021–2025
IMO 9419199 EU ETS5 reporting years
- CO₂ reported 2025
- 4,214 t
- Fuel burned
- 1,341 t
- Time at sea
- 1,850 h
- Emitted at berth
- 10% of total
- Share of year under way
- 21%
- Gross tonnage
- 8,300
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AYSEN STAR against its type
Built in 2010, it is the same age as the median chemical tanker on this register (build year 2010, 1,951 vessels with a known build year). At 8,300 gross tonnage it is smaller than 87% of the other 1,899 chemical tankers with a recorded tonnage. It is one of 402 chemical tankers here under the Liberia flag, 17.2% of the 2,344 on the register. Its MRV returns name it DESNA STAR for 2021–2023 and AYSEN STAR for 2024–2025.
Its 4,214 t of CO₂ for 2025 is 24% below the median of 5,533 t among the 1,483 chemical tankers on this register that reported for 2025. Per nautical mile it emitted 229.7 kg CO₂, close to the type median of 250.2 kg. It logged 1,850 hours at sea against a median of 2,109 hours for its type that year. 9.7% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 5 years with reported emissions, the highest was 2022 (7,370 t) and the lowest 2021 (767 t). Of the 4 comparable vessels listed below with a 2025 return, 3 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2021–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 4,214 | 1,341 | — | 1,850 | 407 | 229.7 | 201.3 | not ranked |
| 2024 | 7,040 | 2,247 | 20,808 | 2,184 | 1,921 | 338.4 | 89.9 | 100 |
| 2023 | 5,673 | 1,794 | — | 2,120 | 1,085 | 272.1 | 92.5 | not ranked |
| 2022 | 7,370 | 2,334 | — | 3,023 | 646 | 266.0 | 64.0 | not ranked |
| 2021 | 767 | 243 | — | 337 | 0 | 208.3 | 18.9 | not ranked |
Vessel particulars
- IMO number
- 9419199
- Previously reported as
- DESNA STAR
- Ship type
- Chemical tanker
- Gross tonnage
- 8,300
- Length overall
- 129.0 m
- Year built
- 2010
- Flag state
- Liberia Wikidata/AIS, undated
- Home port
- Monrovia
- Ice class
- IA
- Technical efficiency (design)
- EIV (3 gCO₂/t·nm)
- Efficiency ranking
- Not ranked: transport work below the floor (2025)
- Verifier
- EnvService GmbH, Germany
- Accreditation
- D-VS-20809-01-00
- Compliance document issued
- 2026-02-24
- Compliance document expires
- 2027-06-30
Reported CO₂ by year
Reported CO₂ in 2025 was 449.4% higher than in 2021, for EU/EEA voyages only.
From 2024 to 2025, emissions fell 40.1% and CO₂ per nautical mile fell 32.1%.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
- 4,280 t
- Methane (CH₄)
- 0.07 t
- Nitrous oxide (N₂O)
- 0.24 t
- Under EU ETS
- 1,920 t, 46% of total
Sources and how to read this
- Emissions: EU MRV publication (THETIS-MRV), reporting years 2021–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0) and Wikimedia Commons.
This page draws on 5 MRV reporting years, 4 of 5 vessel particulars, a name history and a licensed photograph. Not found in the sources for this vessel: an efficiency ranking, 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.