Chemical tanker · Panama flag · built 2010
DDELPHINUS 12: CO₂ emissions 2020–2025
IMO 9359375 EU ETS6 reporting years
- CO₂ reported 2025
- 2,339 t
- Fuel burned
- 734 t
- Distance
- 7,369 nm
- Time at sea
- 487 h
- Emitted at berth
- 16% of total
- Share of year under way
- 6%
- Gross tonnage
- 26,329
DDELPHINUS 12 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 26,329 gross tonnage it is larger than 61% of the other 1,899 chemical tankers with a recorded tonnage. It is one of 259 chemical tankers here under the Panama flag, 11.0% of the 2,344 on the register. Its MRV returns name it STOLT SISTO for 2020–2023 and DDELPHINUS 12 for 2024–2025. The reported port of registry changed: George Town (2021–2022), then Georgetown (2023), then PANAMA (2024).
Its 2,339 t of CO₂ for 2025 is 58% 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 317.4 kg CO₂, 27% above the type median of 250.2 kg. It logged 487 hours at sea against a median of 2,109 hours for its type that year. 16.1% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 6 years with reported emissions, the highest was 2021 (11,347 t) and the lowest 2022 (1,853 t). Its efficiency percentile within the type went from 16 in 2020 to 63 in 2025 (lower is more efficient). Of the 6 comparable vessels listed below with a 2025 return, 4 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 | 2,339 | 734 | 7,369 | 487 | 376 | 317.4 | 17.9 | 63 |
| 2024 | 8,025 | 2,541 | 25,358 | 2,411 | 503 | 316.4 | 16.9 | 53 |
| 2023 | 8,134 | 2,587 | 27,291 | 2,256 | 529 | 298.1 | 11.1 | 24 |
| 2022 | 1,853 | 594 | 6,793 | 557 | 22 | 272.7 | 8.6 | 8 |
| 2021 | 11,347 | 3,613 | 31,849 | 2,966 | 1,441 | 356.3 | 14.0 | 38 |
| 2020 | 1,903 | 609 | 6,598 | 507 | 45 | 288.5 | 10.3 | 16 |
Vessel particulars
- IMO number
- 9359375
- Previously reported as
- STOLT SISTO
- Ship type
- Chemical tanker
- Gross tonnage
- 26,329
- Length overall
- 183.0 m
- Year built
- 2010
- Flag state
- Panama per EU MRV 2024
Sources disagree: Wikidata/AIS (undated) list Cayman Islands. The flag shown is from the newest official source, the EU MRV return for 2024. - Technical efficiency (design)
- EEXI (5.17 gCO₂/t·nm)
- Verifier
- Nippon Kaiji Kyokai, Japan
- Accreditation
- VS-21325-01
- Compliance document issued
- 2026-03-27
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 848 of 1,348 qualifying chemical tankers by EEOI, at the 63rd percentile. The dashed line is the type median, 14.4; this vessel reported 17.9.
EEOI divides emissions by transport work, which for this vessel and year was 130,508,370 tonne-miles over 7,369 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 22.9% higher than in 2020, for EU/EEA voyages only.
From 2024 to 2025, emissions fell 70.9% while distance sailed fell 70.9%and CO₂ per nautical mile rose 0.3%.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
- 2,375 t
- Methane (CH₄)
- 0.04 t
- Nitrous oxide (N₂O)
- 0.13 t
- Under EU ETS
- 1,470 t, 63% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2020 | HELLENIC LLOYD'S S.A. | Greece |
| 2021 | DNV | Germany |
| 2024 | Nippon Kaiji Kyokai | Japan |
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.
- Vessel particulars: Wikidata (CC0).
This page draws on 6 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.