Oil tanker · Liberia flag · built 2002

MARIANNA V.V.: CO₂ emissions 2018–2025

IMO 9259707 EU ETS8 reporting years

CO₂ reported 2025: 14,605 t
Fuel burned: 4,573 t
Distance: 20,075 nm
Time at sea: 2,565 h
Emitted at berth: 27% of total
Share of year under way: 29%
Gross tonnage: 50,199

MARIANNA V.V. against its type

Built in 2002, it is 8 years older than the median oil tanker on this register, which was built in 2010 (2,896 vessels with a known build year). At 50,199 gross tonnage it is smaller than 58% of the other 2,841 oil tankers with a recorded tonnage. It is one of 718 oil tankers here under the Liberia flag, 20.2% of the 3,548 on the register. The same builder is recorded for 103 other vessels here, 28 of them oil tankers. The returns for 2019–2025 all give Monrovia as port of registry.

Its 14,605 t of CO₂ for 2025 is 1.8 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 727.5 kg CO₂, 1.8 times the type median of 403.2 kg. It logged 2,565 hours at sea against a median of 2,030 hours for its type that year. 26.9% of its 2025 emissions were at berth; the median for oil tankers was 7.8%. Across 8 years with reported emissions, the highest was 2019 (21,356 t) and the lowest 2021 (4,175 t). Its efficiency percentile within the type went from 88 in 2018 to 94 in 2025 (lower is more efficient). The one comparable vessel listed below with a 2025 return reported a lower CO₂ per nautical mile.

Emissions by year2018–2025

Year	CO₂ (t)	Fuel (t)	Distance (nm)	At sea (h)	At berth (t)	kg CO₂/nm	EEOI	Percentile
2025	14,605	4,573	20,075	2,565	3,932	727.5	23.1	94
2024	6,241	1,968	—	1,468	1,071	661.7	56.3	not ranked
2023	5,843	1,855	9,902	1,087	620	590.1	34.5	98
2022	11,290	3,570	20,976	3,824	1,837	538.3	13.8	82
2021	4,175	1,329	—	477	594	798.0	34.0	not ranked
2020	12,754	4,071	23,812	2,191	1,790	535.6	17.0	84
2019	21,356	6,828	41,935	3,759	2,863	509.3	15.0	83
2018	16,546	5,294	32,438	7,004	2,308	510.1	17.8	88

Vessel particulars

IMO number: 9259707
Ship type: Oil tanker
Gross tonnage: 50,199
Length overall: 239.0 m
Beam: 38.0 m
Year built: 2002
Flag state: Liberia per EU MRV 2025
Builder: Sasebo Heavy Industries
Port of registry: Monrovia MRV 2025
Technical efficiency (design): EEXI (3.83 gCO₂/t·nm)
Verifier: EMICERT, Greece
Accreditation: 874-4
Compliance document issued: 2026-03-09
Compliance document expires: 2027-06-30

Efficiency against its own type2025

Position 1,369 of 1,448 qualifying oil tankers by EEOI, at the 94th percentile. The dashed line is the type median, 7.5; this vessel reported 23.1.

EEOI divides emissions by transport work, which for this vessel and year was 632,250,649 tonne-miles over 20,075 nautical miles.

Reported CO₂ by year

Reported CO₂ in 2025 was 11.7% lower than in 2018, for EU/EEA voyages only.

From 2024 to 2025, emissions rose 134.0% and CO₂ per nautical mile rose 9.9%.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: 14,830 t
Methane (CH₄): 0.23 t
Nitrous oxide (N₂O): 0.82 t
Under EU ETS: 9,799 t, 67% of total

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).

This page draws on 8 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.