Container ship · United Kingdom flag · built 2007

MAERSK TENNESSEE: CO₂ emissions 2019–2025

IMO 9314210 EU ETS7 reporting years

CO₂ reported 2025: 37,568 t
Fuel burned: 12,127 t
Distance: 73,091 nm
Time at sea: 4,532 h
Emitted at berth: 2% of total
Share of year under way: 52%
Gross tonnage: 50,686

MAERSK TENNESSEE against its type

Built in 2007, it is 1 year older than the median container ship on this register, which was built in 2008 (3,088 vessels with a known build year). At 50,686 gross tonnage it is larger than 52% of the other 3,000 container ships with a recorded tonnage. It is one of 69 container ships here under the United Kingdom flag, 2.0% of the 3,495 on the register. The same builder is recorded for 761 other vessels here, 355 of them container ships. Its MRV returns name it SAFMARINE MAFADI for 2019–2021 and MAERSK TENNESSEE for 2022–2025. The returns for 2019–2025 all give Norfolk as port of registry.

Its 37,568 t of CO₂ for 2025 is 2.3 times the median of 16,359 t among the 2,234 container ships on this register that reported for 2025. Per nautical mile it emitted 514.0 kg CO₂, close to the type median of 545.6 kg. It logged 4,532 hours at sea against a median of 3,155 hours for its type that year. 1.9% of its 2025 emissions were at berth; the median for container ships was 3.2%. Across 7 years with reported emissions, the highest was 2020 (52,886 t) and the lowest 2023 (33,691 t). Its efficiency percentile within the type went from 50 in 2019 to 54 in 2025 (lower is more efficient). Of the 4 sister ships listed below with a 2025 return, 3 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	37,568	12,127	73,091	4,532	715	514.0	15.2	54
2024	40,219	13,045	73,157	4,974	774	549.8	13.7	44
2023	33,691	10,801	70,874	4,854	558	475.4	12.8	35
2022	35,105	10,981	61,978	4,242	630	566.4	17.1	51
2021	51,749	16,597	80,052	4,898	976	646.4	16.1	49
2020	52,886	16,901	85,504	4,818	935	618.5	18.2	59
2019	35,184	11,215	58,548	4,020	556	600.9	17.0	50

Vessel particulars

IMO number: 9314210
Previously reported as: SAFMARINE MAFADI
Ship type: Container ship
Gross tonnage: 50,686
Length overall: 292.0 m
Beam: 32.3 m
Year built: 2007
Flag state: United Kingdom per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list United States. The flag shown is from the newest official source, the EU MRV return for 2025.
Builder: HD Hyundai Heavy Industries
Port of registry: Norfolk MRV 2025
Technical efficiency (design): EEXI (13.2 gCO₂/t·nm)
Verifier: AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD), Greece
Accreditation: 1083-2
Compliance document issued: 2026-03-28
Compliance document expires: 2027-06-30

Efficiency against its own type2025

Position 988 of 1,838 qualifying container ships by EEOI, at the 54th percentile. The dashed line is the type median, 14.2; this vessel reported 15.2.

EEOI divides emissions by transport work, which for this vessel and year was 2,476,477,917 tonne-miles over 73,091 nautical miles.

Reported CO₂ by year

Reported CO₂ in 2025 was 6.8% higher than in 2019, for EU/EEA voyages only.

From 2024 to 2025, emissions fell 6.6% while distance sailed fell 0.1%and CO₂ per nautical mile fell 6.5%.That points mainly to how efficiently it sailed, rather than the other.

Where the 2025 emissions occurred

Methane, nitrous oxide and EU ETS2025

Total CO₂ equivalent: 38,164 t
Methane (CH₄): 0.61 t
Nitrous oxide (N₂O): 2.18 t
Under EU ETS: 18,890 t, 50% of total

Laden voyages2025

CO₂ on laden voyages: 36,854 t, 98% of total
Fuel, laden: 11,900 t
CO₂ per nm, laden: 504.2 kg

The rest of the 2025 total was emitted on ballast legs or at berth.

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) and Wikimedia Commons.

This page draws on 7 MRV reporting years, an efficiency ranking, 5 of 5 vessel particulars, a name history and a licensed photograph. Not found in the sources for this vessel: AIS movements in Norwegian waters, 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.