Bulk carrier · Liberia flag · built 2012
KOTRAG: CO₂ emissions 2022–2025
IMO 9503287 EU ETS4 reporting years
- CO₂ reported 2025
- 1,826 t
- Fuel burned
- 580 t
- Distance
- 6,033 nm
- Time at sea
- 592 h
- Emitted at berth
- 7% of total
- Share of year under way
- 7%
- Gross tonnage
- 33,044
KOTRAG against its type
Built in 2012, it is the same age as the median bulk carrier on this register (build year 2012, 6,882 vessels with a known build year). At 33,044 gross tonnage it is smaller than 57% of the other 6,571 bulk carriers with a recorded tonnage. It is one of 1,589 bulk carriers here under the Liberia flag, 19.5% of the 8,138 on the register. Its MRV returns name it TRISTAR PROSPERITY for 2022 and KOTRAG for 2023–2025. The reported port of registry changed: MAJURO (2022), then Monrovia (2023–2025).
Its 1,826 t of CO₂ for 2025 is 44% below the median of 3,238 t among the 3,732 bulk carriers on this register that reported for 2025. Per nautical mile it emitted 302.7 kg CO₂, 16% above the type median of 260.7 kg. It logged 592 hours at sea against a median of 1,199 hours for its type that year. 7.3% of its 2025 emissions were at berth; the median for bulk carriers was 3.7%. Across 3 years with reported emissions, the highest was 2022 (6,561 t) and the lowest 2025 (1,826 t). Its efficiency percentile within the type went from 54 in 2022 to 52 in 2025 (lower is more efficient). Of the 3 comparable vessels listed below with a 2025 return, 2 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2022–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 1,826 | 580 | 6,033 | 592 | 133 | 302.7 | 7.7 | 52 |
| 2024 | 2,347 | 745 | — | 464 | 77 | 404.6 | 86.3 | not ranked |
| 2023 | No EU/EEA voyages reported | |||||||
| 2022 | 6,561 | 2,080 | 20,889 | 1,764 | 813 | 314.1 | 8.8 | 54 |
Vessel particulars
- IMO number
- 9503287
- Previously reported as
- TRISTAR PROSPERITY
- Ship type
- Bulk carrier
- Gross tonnage
- 33,044
- Length overall
- 189.9 m
- Beam
- 32.3 m
- Year built
- 2012
- Flag state
- Liberia per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list Marshall Islands. The flag shown is from the newest official source, the EU MRV return for 2025. - Port of registry
- Monrovia MRV 2025
- Technical efficiency (design)
- EEXI (4.15 gCO₂/t·nm)
- Verifier
- ICS Verification Services Single Member P.C., Greece
- Accreditation
- 1101-3
- Compliance document issued
- 2026-04-08
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 1,697 of 3,241 qualifying bulk carriers by EEOI, at the 52nd percentile. The dashed line is the type median, 7.6; this vessel reported 7.7.
EEOI divides emissions by transport work, which for this vessel and year was 235,916,021 tonne-miles over 6,033 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 72.2% lower than in 2022, for EU/EEA voyages only.
From 2024 to 2025, emissions fell 22.2% and CO₂ per nautical mile fell 25.2%.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
- 1,854 t
- Methane (CH₄)
- 0.03 t
- Nitrous oxide (N₂O)
- 0.10 t
- Under EU ETS
- 1,146 t, 63% of total
Laden voyages2025
- CO₂ on laden voyages
- 133 t, 7% of total
- Fuel, laden
- 42 t
The rest of the 2025 total was emitted on ballast legs or at berth.
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2022 | AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD) | Greece |
| 2023 | ICS Verification Services Single Member P.C. | Greece |
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 2022–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0).
This page draws on 4 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.