Chemical tanker · Marshall Islands flag · built 2018
CAPTAIN LEON: CO₂ emissions 2022–2025
IMO 9831206 EU ETS3 reporting years
- CO₂ reported 2025
- 1,400 t
- Fuel burned
- 444 t
- Distance
- 6,050 nm
- Time at sea
- 506 h
- Emitted at berth
- 3% of total
- Share of year under way
- 6%
- Gross tonnage
- 29,528
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CAPTAIN LEON against its type
Built in 2018, it is 8 years newer than the median chemical tanker on this register, which was built in 2010 (1,951 vessels with a known build year). At 29,528 gross tonnage it is larger than 76% of the other 1,899 chemical tankers with a recorded tonnage. It is one of 474 chemical tankers here under the Marshall Islands flag, 20.2% of the 2,344 on the register. The same builder is recorded for 983 other vessels here, 330 of them chemical tankers. Its MRV returns name it PS ATENE for 2022–2024 and CAPTAIN LEON for 2025. The reported port of registry changed: Genova (2022–2024), then Majuro (2025).
Its 1,400 t of CO₂ for 2025 is 75% 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 231.4 kg CO₂, close to the type median of 250.2 kg. It logged 506 hours at sea against a median of 2,109 hours for its type that year. 2.5% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 3 years with reported emissions, the highest was 2024 (4,051 t) and the lowest 2025 (1,400 t). Its efficiency percentile within the type went from 12 in 2022 to 29 in 2025 (lower is more efficient). Of the 6 sister ships listed below with a 2025 return, 3 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 | 1,400 | 444 | 6,050 | 506 | 35 | 231.4 | 10.8 | 29 |
| 2024 | 4,051 | 1,293 | 16,971 | 1,450 | 367 | 238.7 | 12.2 | 34 |
| 2022 | 3,047 | 976 | 13,487 | 1,137 | 86 | 225.9 | 9.3 | 12 |
Vessel particulars
- IMO number
- 9831206
- Previously reported as
- PS ATENE
- Ship type
- Chemical tanker
- Gross tonnage
- 29,528
- Length overall
- 183.0 m
- Beam
- 32.0 m
- Year built
- 2018
- Flag state
- Marshall Islands per EU MRV 2025
- Builder
- HD Hyundai Mipo
- Port of registry
- Majuro MRV 2025
- Technical efficiency (design)
- EEDI (4.15 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
- 2026-04-02
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 393 of 1,348 qualifying chemical tankers by EEOI, at the 29th percentile. The dashed line is the type median, 14.4; this vessel reported 10.8.
EEOI divides emissions by transport work, which for this vessel and year was 129,133,764 tonne-miles over 6,050 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 54.1% lower than in 2022, for EU/EEA voyages only. No return is recorded for 2023, so the series has gaps.
From 2024 to 2025, emissions fell 65.4% while distance sailed fell 64.4%and CO₂ per nautical mile fell 3.1%.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
- 1,422 t
- Methane (CH₄)
- 0.02 t
- Nitrous oxide (N₂O)
- 0.08 t
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2022 | DNV | Germany |
| 2024 | RINA Services Spa | Italy |
| 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 2022–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0) and Wikimedia Commons.
This page draws on 3 MRV reporting years, an efficiency ranking, 5 of 5 vessel particulars, a name history and a licensed photograph. Not found in the sources for this vessel: 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.