Container ship · Singapore flag · built 2005

MAERSK MONTE ALTO: CO₂ emissions 2020–2025

IMO 9283227 EU ETS2 reporting years

CO₂ reported 2025: 27,858 t
Fuel burned: 8,936 t
Distance: 47,610 nm
Time at sea: 3,242 h
Emitted at berth: 2% of total
Share of year under way: 37%
Gross tonnage: 69,132

MAERSK MONTE ALTO against its type

Built in 2005, it is 3 years older than the median container ship on this register, which was built in 2008 (3,088 vessels with a known build year). At 69,132 gross tonnage it is larger than 61% of the other 3,000 container ships with a recorded tonnage. It is one of 362 container ships here under the Singapore flag, 10.4% of the 3,495 on the register. The same builder is recorded for 660 other vessels here, 231 of them container ships. Its MRV returns name it MONTE SARMIENTO for 2020 and MAERSK MONTE ALTO for 2025. The reported port of registry changed: Rio de Janeiro (2020), then Singapore (2025).

Its 27,858 t of CO₂ for 2025 is 1.7 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 585.1 kg CO₂, close to the type median of 545.6 kg. It logged 3,242 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%. Of the 6 sister ships listed below with a 2025 return, 5 reported a lower CO₂ per nautical mile than this vessel.

Emissions by year2020–2025

Year	CO₂ (t)	Fuel (t)	Distance (nm)	At sea (h)	At berth (t)	kg CO₂/nm	EEOI	Percentile
2025	27,858	8,936	47,610	3,242	536	585.1	15.5	55
2020	4,602	1,476	—	682	293	615.4	—	—

Vessel particulars

IMO number: 9283227
Previously reported as: MONTE SARMIENTO
Ship type: Container ship
Gross tonnage: 69,132
Length overall: 272.0 m
Year built: 2005
Flag state: Singapore per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list Brazil. The flag shown is from the newest official source, the EU MRV return for 2025.
Builder: Hanwha Ocean
Port of registry: Singapore MRV 2025
Technical efficiency (design): EEXI (12.9 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: 2026-03-29
Compliance document expires: 2027-06-30

Efficiency against its own type2025

Position 1,005 of 1,838 qualifying container ships by EEOI, at the 55th percentile. The dashed line is the type median, 14.2; this vessel reported 15.5.

EEOI divides emissions by transport work, which for this vessel and year was 1,793,800,386 tonne-miles over 47,610 nautical miles.

Reported CO₂ by year

Reported CO₂ in 2025 was 505.3% higher than in 2020, for EU/EEA voyages only. No return is recorded for 2021, 2022, 2023, 2024, so the series has gaps.

From 2020 to 2025, emissions rose 505.3% and CO₂ per nautical mile fell 4.9%.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: 28,296 t
Methane (CH₄): 0.45 t
Nitrous oxide (N₂O): 1.61 t
Under EU ETS: 14,013 t, 50% of total

Laden voyages2025

CO₂ on laden voyages: 27,322 t, 98% of total
Fuel, laden: 8,769 t
CO₂ per nm, laden: 573.9 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 2020–2025, published by the European Commission.
Vessel particulars: Wikidata (CC0) and Wikimedia Commons.

This page draws on 2 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.