Oil tanker · Norway flag · built 2016

MARI JONE: CO₂ emissions 2019–2025

IMO 9725316 EU ETS4 reporting years

CO₂ reported 2025: 8,795 t
Fuel burned: 3,726 t
Distance: 40,013 nm
Time at sea: 3,663 h
Emitted at berth: 3% of total
Share of year under way: 42%
Gross tonnage: 30,945

MARI JONE against its type

Built in 2016, it is 6 years newer than the median oil tanker on this register, which was built in 2010 (2,896 vessels with a known build year). At 30,945 gross tonnage it is smaller than 69% of the other 2,841 oil tankers with a recorded tonnage. It is one of 58 oil tankers here under the Norway flag, 1.6% of the 3,548 on the register. The same builder is recorded for 983 other vessels here, 270 of them oil tankers. Thome Ship Management is linked to 42 vessels on this register. The returns for 2019–2025 all give Haugesund as port of registry.

Its 8,795 t of CO₂ for 2025 is 11% above the median of 7,922 t among the 1,704 oil tankers on this register that reported for 2025. Per nautical mile it emitted 219.8 kg CO₂, 45% below the type median of 403.2 kg. It logged 3,663 hours at sea against a median of 2,030 hours for its type that year. 3.4% of its 2025 emissions were at berth; the median for oil tankers was 7.8%. Across 4 years with reported emissions, the highest was 2025 (8,795 t) and the lowest 2021 (1,745 t). Its efficiency percentile within the type went from 23 in 2019 to 77 in 2025 (lower is more efficient). Of the 6 sister ships listed below with a 2025 return, 0 reported a lower CO₂ per nautical mile than this vessel.

Emissions by year2019–2025

Year	CO₂ (t)	Fuel (t)	Distance (nm)	At sea (h)	At berth (t)	kg CO₂/nm	EEOI	Percentile
2025	8,795	3,726	40,013	3,663	299	219.8	10.9	77
2024	7,776	3,228	31,659	2,614	511	245.6	7.2	46
2021	1,745	564	8,166	652	52	213.7	10.6	17
2019	2,732	1,267	12,335	1,218	107	221.5	11.4	23

Vessel particulars

IMO number: 9725316
Ship type: Oil tanker
Gross tonnage: 30,945
Length overall: 186.1 m
Beam: 32.2 m
Year built: 2016
Flag state: Norway per EU MRV 2025
Builder: HD Hyundai Mipo
Port of registry: HAUGESUND MRV 2025
Technical efficiency (design): EEXI (4.19 gCO₂/t·nm)
Operator: Thome Ship Management
Verifier: DNV, Germany
Accreditation: VS-16026-01
Compliance document issued: 2026-03-02
Compliance document expires: 2027-06-30

Efficiency against its own type2025

Position 1,117 of 1,448 qualifying oil tankers by EEOI, at the 77th percentile. The dashed line is the type median, 7.5; this vessel reported 10.9.

Across the 39 ranked vessels operated by Thome Ship Management, the median percentile is 54. This vessel is less efficient than its own fleet median.

EEOI divides emissions by transport work, which for this vessel and year was 809,085,557 tonne-miles over 40,013 nautical miles.

Reported CO₂ by year

Reported CO₂ in 2025 was 221.9% higher than in 2019, for EU/EEA voyages only. No return is recorded for 2020, 2022, 2023, so the series has gaps.

From 2024 to 2025, emissions rose 13.1% while distance sailed rose 26.4%and CO₂ per nautical mile fell 10.5%.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: 8,978 t
Methane (CH₄): 0.19 t
Nitrous oxide (N₂O): 0.67 t
Under EU ETS: 4,728 t, 54% of total

Sources and how to read this

Emissions: EU MRV publication (THETIS-MRV), reporting years 2019–2025, published by the European Commission.
Vessel particulars: Wikidata (CC0).

This page draws on 4 MRV reporting years, an efficiency ranking and 5 of 5 vessel particulars. Not found in the sources for this vessel: AIS movements in Norwegian waters, a name history, 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.