Oil tanker · Liberia flag
NAUTILUS: CO₂ emissions 2018–2025
IMO 9298765 EU ETS8 reporting years
- CO₂ reported 2025
- 5,704 t
- Fuel burned
- 1,828 t
- Distance
- 11,334 nm
- Time at sea
- 1,017 h
- Emitted at berth
- 5% of total
- Share of year under way
- 12%
NAUTILUS against its type
It is one of 718 oil tankers here under the Liberia flag, 20.2% of the 3,548 on the register. Its MRV returns name it NAUTILUS for 2018–2023 and NAUTILUS I for 2024–2025. The reported port of registry changed: Piraeus (2018–2023), then Monrovia (2024–2025).
Its 5,704 t of CO₂ for 2025 is 28% below the median of 7,922 t among the 1,704 oil tankers on this register that reported for 2025. Per nautical mile it emitted 503.3 kg CO₂, 25% above the type median of 403.2 kg. It logged 1,017 hours at sea against a median of 2,030 hours for its type that year. 4.7% of its 2025 emissions were at berth; the median for oil tankers was 7.8%. Across 8 years with reported emissions, the highest was 2018 (17,985 t) and the lowest 2021 (3,083 t). Its efficiency percentile within the type went from 8 in 2018 to 20 in 2025 (lower is more efficient). Of the 3 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 | 5,704 | 1,828 | 11,334 | 1,017 | 270 | 503.3 | 5.2 | 20 |
| 2024 | 10,046 | 3,213 | 19,669 | 1,923 | 691 | 510.8 | 7.0 | 42 |
| 2023 | 11,383 | 3,640 | 21,296 | 1,854 | 1,107 | 534.5 | 5.8 | 23 |
| 2022 | 6,993 | 2,241 | 11,198 | 1,001 | 357 | 624.5 | 5.3 | 17 |
| 2021 | 3,083 | 987 | 5,507 | 538 | 307 | 559.8 | 4.8 | 12 |
| 2020 | 8,531 | 2,729 | 16,832 | 1,559 | 463 | 506.9 | 12.9 | 74 |
| 2019 | 11,905 | 3,809 | 26,938 | 2,493 | 947 | 441.9 | 5.0 | 13 |
| 2018 | 17,985 | 5,757 | 41,587 | 4,709 | 1,126 | 432.5 | 4.0 | 8 |
Vessel particulars
- IMO number
- 9298765
- Previously reported as
- NAUTILUS I
- Call sign
- 5LTV6
- Ship type
- Oil tanker
- Length overall
- 270.0 m
- Beam
- 50.0 m
- Flag state
- Liberia per EU MRV 2025
- Port of registry
- Monrovia MRV 2025
- Ice class
- IA
- Technical efficiency (design)
- EIV (3.73 gCO₂/t·nm)
- Verifier
- HELLENIC LLOYD'S S.A., Greece
- Accreditation
- 1190
- Compliance document issued
- 2026-05-07
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 284 of 1,448 qualifying oil tankers by EEOI, at the 20th percentile. The dashed line is the type median, 7.5; this vessel reported 5.2.
EEOI divides emissions by transport work, which for this vessel and year was 1,101,206,564 tonne-miles over 11,334 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 68.3% lower than in 2018, for EU/EEA voyages only.
From 2024 to 2025, emissions fell 43.2% while distance sailed fell 42.4%and CO₂ per nautical mile fell 1.5%.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
- 5,794 t
- Methane (CH₄)
- 0.09 t
- Nitrous oxide (N₂O)
- 0.33 t
- Under EU ETS
- 2,987 t, 52% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | EMICERT | Greece |
| 2019 | HELLENIC LLOYD'S S.A. | 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 2018–2025, published by the European Commission.
This page draws on 8 MRV reporting years, an efficiency ranking, 2 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.