Oil tanker · Portugal flag · built 2008

STEN SUOMI: CO₂ emissions 2018–2025

IMO 9378723 MMSI 255915982EU ETS8 reporting years

CO₂ reported 2025: 9,275 t
Fuel burned: 2,893 t
Distance: 52,718 nm
Time at sea: 5,142 h
Emitted at berth: 19% of total
Share of year under way: 59%
Gross tonnage: 11,935

STEN SUOMI — Wolfgang Fricke, CC BY 3.0 · File

Emissions by year2018–2025

Year	CO₂ (t)	Fuel (t)	Distance (nm)	At sea (h)	At berth (t)	kg CO₂/nm	EEOI	Percentile
2025	9,275	2,893	52,718	5,142	1,736	175.9	28.6	97
2024	7,557	2,357	33,747	3,322	1,219	223.9	27.2	97
2023	6,757	2,107	27,023	2,825	1,243	250.0	35.2	98
2022	8,399	2,620	33,457	3,616	1,508	251.0	33.6	98
2021	6,911	2,156	32,370	3,022	978	213.5	26.2	96
2020	10,125	3,158	54,922	5,142	1,854	184.4	26.9	94
2019	9,501	2,964	49,112	5,345	1,931	193.5	26.6	95
2018	8,791	2,742	44,786	5,547	1,334	196.3	25.3	95

Vessel particulars

IMO number: 9378723
MMSI: 255915982
Call sign: CQ2440
Ship type: Oil tanker
Gross tonnage: 11,935
Length overall: 144.1 m
Beam: 23.0 m
Year built: 2008
Flag state: Portugal per EU MRV 2025
Builder: Jiangnan Shipyard
Port of registry: Madeira MRV 2025
Ice class: IA
Technical efficiency (design): EEXI (7.42 gCO₂/t·nm)
Verifier: DNV, Germany
Accreditation: VS-16026-01
Compliance document issued: 2026-02-16
Compliance document expires: 2027-06-30

Flag state is derived from the reported port of registry, not reported directly, and reflects the registry at the time of reporting.

Efficiency against its own type2025

Position 1,405 of 1,448 qualifying oil tankers by EEOI, at the 97th percentile. The dashed line is the type median, 7.5; this vessel reported 28.6.

EEOI divides emissions by transport work, which for this vessel and year was 324,304,895 tonne-miles over 52,718 nautical miles.

Reported CO₂ by year

Reported CO₂ in 2025 was 5.5% higher than in 2018. EU MRV only covers voyages to, from and within the EU/EEA, so a change can reflect where the vessel sailed as much as how much it emitted.

From 2024 to 2025, emissions rose 22.7% while distance sailed rose 56.2%and CO₂ per nautical mile fell 21.4%.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: 9,417 t
Methane (CH₄): 0.14 t
Nitrous oxide (N₂O): 0.52 t
Under EU ETS: 9,275 t, 100% of total

Observed movementsAIS · Norwegian waters

First seen: 13 Feb 2026
Last seen: 02 Jun 2026
Days observed: 28
Positions: 2,101
Median speed: 10.8 kn

Positions come from the Norwegian Coastal Administration's open AIS extract, which covers 01 Jul 2025 to 27 Jul 2026. The register is not updated after 27 Jul 2026, so movements after that date are not included; absence of later positions does not mean the ship stopped sailing.

400 points sampled hourly from 2,101 recorded positions. The filled circle is the first observed position, the open one the last. Named squares are ports, shown for orientation; they are not recorded calls.

Positions recorded per month

Norwegian waters only, 01 Jul 2025 to 27 Jul 2026. A gap here means the vessel was not recorded in that area. It is not evidence that the vessel was idle, and not evidence that a transponder was switched off. Voyages elsewhere are outside this dataset.

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.

What this page is built on

Reporting years: 8
Ranked by efficiency: yes
Vessel particulars: 5 of 5
Movement data: yes
Name history: none recorded
Photograph: yes
Sanctions record: none
Inspection record: none in US waters

Caveats that apply to every vessel page

EEOI above 100,000 is withheld. Those values come from returns where reported transport work is near zero, which makes the ratio meaningless rather than extreme. Median across the dataset is around 12.

Emission categories overlap. In the MRV return, emissions at berth are also counted inside the voyage legs, so the categories do not sum to the total. They are shown side by side rather than stacked for that reason.

Distance is derived, intensity is reported. The MRV return publishes CO₂ per nautical mile but not the distance itself, which is null in all 106,564 rows of the source. The distance column is therefore filled from the ranking step, which reconstructs it, and is blank for years where a vessel was not ranked. That is why a row can show an intensity without a distance.

Percentile is within type and year. It is the vessel's position among qualifying ships of the same type that year, where lower is more efficient. A blank means the vessel did not qualify for ranking that year.

Sister ships share a builder, a type and a build year within two years of this vessel. That holds hull and machinery roughly constant and leaves operation as the variable, which is why they are listed before nearest-by-tonnage.

Methane and nitrous oxide start in 2024. They were not reported before that period, so earlier years cannot be compared against them.

Technical efficiency is a design figure fixed at construction. A vessel can hold a good index and still emit heavily by sailing fast, waiting at anchor or carrying little.

Inspection records cover United States waters only. An empty record is not evidence of a clean history elsewhere.

Empty means unreported, never zero. Nothing here is modelled, estimated or interpolated. See the methodology.

Something wrong on this page? See corrections. We do not hold the source registers and cannot amend them, but we will fix anything we have got wrong in reproducing them.