Oil tanker · Marshall Islands flag · built 2017
ARISTAIOS: CO₂ emissions 2021–2025
IMO 9779939 4 reporting years
- CO₂ reported 2023
- 9,913 t
- Fuel burned
- 3,157 t
- Distance
- 28,274 nm
- Time at sea
- 2,795 h
- Emitted at berth
- 5% of total
- Share of year under way
- 32%
- Gross tonnage
- 60,751
ARISTAIOS against its type
Built in 2017, it is 7 years newer than the median oil tanker on this register, which was built in 2010 (2,896 vessels with a known build year). At 60,751 gross tonnage it is larger than 54% of the other 2,841 oil tankers with a recorded tonnage. It is one of 793 oil tankers here under the Marshall Islands flag, 22.4% of the 3,548 on the register. The same builder is recorded for 53 other vessels here, 37 of them oil tankers. Its MRV returns name it ARISTAIOS for 2021 and SEAWAYS REYES for 2022–2025. The returns for 2021–2025 all give Majuro as port of registry.
Its 9,913 t of CO₂ for 2023 is 32% above the median of 7,491 t among the 1,850 oil tankers on this register that reported for 2023. Per nautical mile it emitted 350.6 kg CO₂, 14% below the type median of 408.5 kg. It logged 2,795 hours at sea against a median of 1,807 hours for its type that year. 4.6% of its 2023 emissions were at berth; the median for oil tankers was 8.4%. Across 3 years with reported emissions, the highest was 2023 (9,913 t) and the lowest 2022 (4,895 t). Its efficiency percentile within the type went from 5 in 2021 to 54 in 2023 (lower is more efficient). The one sister ship listed below with a 2023 return reported a higher or equal CO₂ per nautical mile.
No EU/EEA voyages were reported for 2025: zero CO₂ and zero time at sea, left out of the trend and of any ranking.
Emissions by year2021–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | No EU/EEA voyages reported | |||||||
| 2023 | 9,913 | 3,157 | 28,274 | 2,795 | 461 | 350.6 | 8.4 | 54 |
| 2022 | 4,895 | 1,555 | 12,856 | 1,122 | 808 | 380.8 | 4.7 | 9 |
| 2021 | 6,480 | 2,067 | 18,521 | 1,614 | 396 | 349.9 | 4.0 | 5 |
Vessel particulars
- IMO number
- 9779939
- Previously reported as
- SEAWAYS REYES
- Ship type
- Oil tanker
- Gross tonnage
- 60,751
- Length overall
- 250.0 m
- Beam
- 44.0 m
- Year built
- 2017
- Flag state
- Marshall Islands per EU MRV 2025
- Builder
- Daehan Shipbuilding
- Port of registry
- Majuro MRV 2023
- Ice class
- IC
- Technical efficiency (design)
- EEDI (2.92 gCO₂/t·nm)
- Verifier
- HELLENIC LLOYD'S S.A., Greece
- Accreditation
- 1190
- Compliance document issued
- 2024-05-01
- Compliance document expires
- 2025-06-30
Efficiency against its own type2023
Position 879 of 1,615 qualifying oil tankers by EEOI, at the 54th percentile. The dashed line is the type median, 8.0; this vessel reported 8.4.
EEOI divides emissions by transport work, which for this vessel and year was 1,185,727,273 tonne-miles over 28,274 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2023 was 53.0% higher than in 2021, for EU/EEA voyages only. No return is recorded for 2024, so the series has gaps.
From 2022 to 2023, emissions rose 102.5% while distance sailed rose 119.9%and CO₂ per nautical mile fell 7.9%.That points mainly to how much the vessel sailed, rather than the other.
Where the 2023 emissions occurred
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).
This page draws on 4 MRV reporting years, an efficiency ranking, 5 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.