Oil tanker · Marshall Islands flag
RIO GRANDE: CO₂ emissions 2018–2025
IMO 9593438 EU ETS8 reporting years
- CO₂ reported 2025
- 17,774 t
- Fuel burned
- 5,658 t
- Time at sea
- 3,358 h
- Emitted at berth
- 7% of total
- Share of year under way
- 38%
RIO GRANDE against its type
It is one of 793 oil tankers here under the Marshall Islands flag, 22.4% of the 3,548 on the register. Its MRV returns name it RIO GRANDE for 2018–2021 and SEAWAYS RIO GRANDE for 2022–2025. The reported port of registry changed: RIO GRANDE (2018), then Majuro (2019–2025).
Its 17,774 t of CO₂ for 2025 is 2.2 times the median of 7,922 t among the 1,704 oil tankers on this register that reported for 2025. Per nautical mile it emitted 502.3 kg CO₂, 25% above the type median of 403.2 kg. It logged 3,358 hours at sea against a median of 2,030 hours for its type that year. 7.2% of its 2025 emissions were at berth; the median for oil tankers was 7.8%. Across 7 years with reported emissions, the highest was 2025 (17,774 t) and the lowest 2024 (6,225 t). Its efficiency percentile within the type went from 19 in 2018 to 36 in 2024 (lower is more efficient). Of the 2 comparable vessels listed below with a 2025 return, 2 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2018–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 17,774 | 5,658 | — | 3,358 | 1,287 | 502.3 | 0.5 | not ranked |
| 2024 | 6,225 | 1,989 | 13,193 | 1,179 | 483 | 471.8 | 6.5 | 36 |
| 2023 | 9,975 | 3,184 | 21,188 | 1,772 | 937 | 470.8 | 7.0 | 39 |
| 2022 | No EU/EEA voyages reported | |||||||
| 2021 | 7,887 | 2,490 | 15,902 | 1,525 | 755 | 496.0 | 6.3 | 29 |
| 2020 | 9,954 | 3,149 | 16,877 | 1,513 | 689 | 589.8 | 9.1 | 54 |
| 2019 | 12,971 | 4,136 | 24,845 | 2,873 | 1,526 | 522.1 | 7.8 | 43 |
| 2018 | 9,574 | 3,068 | 18,863 | 1,919 | 473 | 507.6 | 5.3 | 19 |
Vessel particulars
- IMO number
- 9593438
- Previously reported as
- SEAWAYS RIO GRANDE
- Ship type
- Oil tanker
- Flag state
- Marshall Islands per EU MRV 2025
- Port of registry
- Majuro MRV 2025
- Technical efficiency (design)
- EEXI (2.82 gCO₂/t·nm)
- Efficiency ranking
- Not ranked: cargo above the plausible ceiling (2025)
- 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
Reported CO₂ by year
Reported CO₂ in 2025 was 85.7% higher than in 2018, for EU/EEA voyages only.
From 2024 to 2025, emissions rose 185.6% and CO₂ per nautical mile rose 6.5%.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
- 18,052 t
- Methane (CH₄)
- 0.28 t
- Nitrous oxide (N₂O)
- 1.02 t
- Under EU ETS
- 10,755 t, 61% of total
Laden voyages2025
- CO₂ on laden voyages
- 10,759 t, 61% of total
- Fuel, laden
- 3,426 t
- CO₂ per nm, laden
- 525.8 kg
The rest of the 2025 total was emitted on ballast legs or at berth.
Sources and how to read this
- Emissions: EU MRV publication (THETIS-MRV), reporting years 2018–2025, published by the European Commission.
This page draws on 8 MRV reporting years, 1 of 5 vessel particulars and a name history. Not found in the sources for this vessel: an efficiency ranking, 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.