Oil tanker · United Kingdom flag · built 2018
STENA IMPERO: CO₂ emissions 2018–2025
IMO 9797400 MMSI 219764000EU ETS6 reporting years
- CO₂ reported 2025
- 7,405 t
- Fuel burned
- 2,366 t
- Distance
- 26,639 nm
- Time at sea
- 2,267 h
- Emitted at berth
- 5% of total
- Share of year under way
- 26%
- Gross tonnage
- 29,579
STENA IMPERO against its type
Built in 2018, it is 8 years newer than the median oil tanker on this register, which was built in 2010 (2,896 vessels with a known build year). At 29,579 gross tonnage it is smaller than 77% of the other 2,841 oil tankers with a recorded tonnage. It is one of 11 oil tankers here under the United Kingdom flag, 0.3% of the 3,548 on the register. The same builder is recorded for 192 other vessels here, 71 of them oil tankers. The returns for 2021–2025 all give London as port of registry.
Its 7,405 t of CO₂ for 2025 is close to the median of 7,922 t among the 1,704 oil tankers on this register that reported for 2025. Per nautical mile it emitted 278.0 kg CO₂, 31% below the type median of 403.2 kg. It logged 2,267 hours at sea against a median of 2,030 hours for its type that year. 4.6% of its 2025 emissions were at berth; the median for oil tankers was 7.8%. Across 6 years with reported emissions, the highest was 2022 (9,458 t) and the lowest 2019 (2,089 t). Its efficiency percentile within the type went from 4 in 2018 to 54 in 2025 (lower is more efficient). Of the 5 sister ships listed below with a 2025 return, 0 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 | 7,405 | 2,366 | 26,639 | 2,267 | 339 | 278.0 | 7.7 | 54 |
| 2024 | 9,416 | 3,011 | 37,509 | 3,144 | 256 | 251.0 | 7.8 | 52 |
| 2022 | 9,458 | 3,020 | 35,154 | 2,804 | 685 | 269.1 | 9.1 | 60 |
| 2021 | 6,672 | 2,115 | 19,394 | 1,869 | 1,429 | 344.0 | 17.5 | 87 |
| 2019 | 2,089 | 666 | 8,613 | 775 | 88 | 242.6 | 6.8 | 2 |
| 2018 | 5,815 | 1,853 | 21,782 | 2,242 | 341 | 266.9 | 7.8 | 4 |
Vessel particulars
- IMO number
- 9797400
- MMSI
- 219764000
- Call sign
- OVYW2
- Ship type
- Oil tanker
- Gross tonnage
- 29,579
- Length overall
- 183.0 m
- Beam
- 32.0 m
- Year built
- 2018
- Flag state
- United Kingdom per EU MRV 2025
- Port of registry
- London MRV 2025
- Technical efficiency (design)
- EEXI (4.37 gCO₂/t·nm)
- Operator
- Stena Bulk
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2026-02-06
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 776 of 1,448 qualifying oil tankers by EEOI, at the 54th percentile. The dashed line is the type median, 7.5; this vessel reported 7.7.
EEOI divides emissions by transport work, which for this vessel and year was 957,994,825 tonne-miles over 26,639 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 27.4% higher than in 2018, for EU/EEA voyages only. No return is recorded for 2020, 2023, so the series has gaps.
From 2024 to 2025, emissions fell 21.4% while distance sailed fell 29.0%and CO₂ per nautical mile rose 10.7%.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
- 7,521 t
- Methane (CH₄)
- 0.12 t
- Nitrous oxide (N₂O)
- 0.43 t
- Under EU ETS
- 4,091 t, 55% of total
Observed movementsAIS · Norwegian waters
- First seen
- 05 Jun 2026
- Last seen
- 15 Jun 2026
- Days observed
- 8
- Positions
- 268
- Median speed
- 10.3 kn
Its recorded positions span 58.0°N to 60.9°N and 4.4°E to 5.1°E.
118 hourly points from 268 positions. Filled circle first, open circle last; squares are ports for orientation, not calls.
Norwegian Coastal Administration open AIS, Norwegian waters only, 01 Jul 2025 to 27 Jul 2026. A gap means the vessel was not recorded here, not that it was idle or that a transponder was off.
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | Lloyd's Register Quality Assurance Ltd | United Kingdom |
| 2021 | DNV | Germany |
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.
- Vessel particulars: Wikidata (CC0) and Wikimedia Commons.
- Movements: Norwegian Coastal Administration open AIS extract.
This page draws on 6 MRV reporting years, an efficiency ranking, 5 of 5 vessel particulars, AIS movements in Norwegian waters and a licensed photograph. Not found in the sources for this vessel: a name history, 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.