Chemical tanker · Marshall Islands flag
STI TOPAZ: CO₂ emissions 2020–2025
IMO 9629938 EU ETS4 reporting years
- CO₂ reported 2025
- 6,841 t
- Fuel burned
- 2,177 t
- Distance
- 23,064 nm
- Time at sea
- 2,187 h
- Emitted at berth
- 5% of total
- Share of year under way
- 25%
STI TOPAZ against its type
It is one of 474 chemical tankers here under the Marshall Islands flag, 20.2% of the 2,344 on the register. Its MRV returns name it STI TOPAZ for 2020–2021 and VESTA for 2024–2025. The returns for 2020–2025 all give Majuro as port of registry.
Its 6,841 t of CO₂ for 2025 is 24% above the median of 5,531 t among the 1,484 chemical tankers on this register that reported for 2025. Per nautical mile it emitted 296.6 kg CO₂, 19% above the type median of 250.2 kg. It logged 2,187 hours at sea against a median of 2,106 hours for its type that year. 5.3% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 4 years with reported emissions, the highest was 2024 (6,920 t) and the lowest 2020 (2,350 t). Its efficiency percentile within the type went from 38 in 2020 to 62 in 2025 (lower is more efficient). Of the 4 comparable vessels listed below with a 2025 return, 2 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2020–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 6,841 | 2,177 | 23,064 | 2,187 | 360 | 296.6 | 17.5 | 62 |
| 2024 | 6,920 | 2,201 | 22,062 | 1,912 | 632 | 313.7 | 12.5 | 83 |
| 2021 | 3,233 | 1,035 | 12,033 | 1,048 | 112 | 268.7 | 8.7 | 53 |
| 2020 | 2,350 | 749 | 8,368 | 742 | 142 | 280.8 | 7.5 | 38 |
Vessel particulars
- IMO number
- 9629938
- Previously reported as
- VESTA
- Ship type
- Chemical tanker
- Flag state
- Marshall Islands per EU MRV 2025
- Port of registry
- Majuro MRV 2025
- Technical efficiency (design)
- EEXI (4.86 gCO₂/t·nm)
- Verifier
- AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD), Greece
- Accreditation
- 1083-2
- Compliance document issued
- 2026-03-26
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 829 of 1,348 qualifying chemical tankers by EEOI, at the 62nd percentile. The dashed line is the type median, 14.4; this vessel reported 17.5.
EEOI divides emissions by transport work, which for this vessel and year was 390,265,830 tonne-miles over 23,064 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 191.2% higher than in 2020, for EU/EEA voyages only. No return is recorded for 2022, 2023, so the series has gaps.
From 2024 to 2025, emissions fell 1.1% while distance sailed rose 4.5%and CO₂ per nautical mile fell 5.4%.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 6,948 t
- Methane (CH₄)
- 0.11 t
- Nitrous oxide (N₂O)
- 0.39 t
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2020 | DNV | Germany |
| 2024 | HELLENIC LLOYD'S S.A. | Greece |
| 2025 | AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD) | 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 2020–2025, published by the European Commission.
This page draws on 4 MRV reporting years, an efficiency ranking, 1 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.