Container ship · Liberia flag · built 2009
MAERSK NITEROI: CO₂ emissions 2018–2025
IMO 9434943 EU ETS8 reporting years
- CO₂ reported 2025
- 20,527 t
- Fuel burned
- 6,551 t
- Distance
- 55,243 nm
- Time at sea
- 4,140 h
- Emitted at berth
- 6% of total
- Share of year under way
- 47%
- Gross tonnage
- 26,836
MAERSK NITEROI against its type
Built in 2009, it is 1 year newer than the median container ship on this register, which was built in 2008 (3,088 vessels with a known build year). At 26,836 gross tonnage it is smaller than 68% of the other 3,000 container ships with a recorded tonnage. It is one of 976 container ships here under the Liberia flag, 27.9% 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 MAERSK NITEROI for 2018–2020 and PUERTO LIMON EXPRESS for 2021–2025. The reported port of registry changed: Hong Kong (2018–2023), then Monrovia (2024–2025).
Its 20,527 t of CO₂ for 2025 is 25% above the median of 16,359 t among the 2,234 container ships on this register that reported for 2025. Per nautical mile it emitted 371.6 kg CO₂, 32% below the type median of 545.6 kg. It logged 4,140 hours at sea against a median of 3,155 hours for its type that year. 5.9% of its 2025 emissions were at berth; the median for container ships was 3.2%. Across 8 years with reported emissions, the highest was 2019 (32,769 t) and the lowest 2022 (13,211 t). Its efficiency percentile within the type went from 58 in 2018 to 73 in 2025 (lower is more efficient). Of the 3 sister ships listed below with a 2025 return, 1 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2018–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 20,527 | 6,551 | 55,243 | 4,140 | 1,207 | 371.6 | 21.9 | 73 |
| 2024 | 26,039 | 8,331 | 62,950 | 4,348 | 866 | 413.6 | 23.2 | 74 |
| 2023 | 18,272 | 5,848 | 44,232 | 3,066 | 515 | 413.1 | 25.4 | 70 |
| 2022 | 13,211 | 4,227 | 31,231 | 2,156 | 699 | 423.0 | 23.4 | 67 |
| 2021 | 20,855 | 6,668 | 52,198 | 3,354 | 587 | 399.5 | 27.3 | 75 |
| 2020 | 28,948 | 9,236 | 86,133 | 5,984 | 861 | 336.1 | 22.6 | 70 |
| 2019 | 32,769 | 10,488 | 83,074 | 5,588 | 532 | 394.4 | 20.3 | 62 |
| 2018 | 31,847 | 10,188 | 78,122 | 5,112 | 771 | 407.7 | 21.2 | 58 |
Vessel particulars
- IMO number
- 9434943
- Previously reported as
- PUERTO LIMON EXPRESS
- Ship type
- Container ship
- Gross tonnage
- 26,836
- Length overall
- 210.1 m
- Beam
- 30.3 m
- Year built
- 2009
- Flag state
- Liberia per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list Hong Kong. The flag shown is from the newest official source, the EU MRV return for 2025. - Builder
- HD Hyundai Heavy Industries
- Port of registry
- Monrovia MRV 2025
- Ice class
- IA
- Technical efficiency (design)
- EEXI (16.97 gCO₂/t·nm)
- Verifier
- Korean Register, Korea, Republic of
- Accreditation
- D-VS-20824-01-00
- Compliance document issued
- 2026-03-30
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 1,337 of 1,838 qualifying container ships by EEOI, at the 73rd percentile. The dashed line is the type median, 14.2; this vessel reported 21.9.
EEOI divides emissions by transport work, which for this vessel and year was 936,453,467 tonne-miles over 55,243 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 35.5% lower than in 2018, for EU/EEA voyages only.
From 2024 to 2025, emissions fell 21.2% while distance sailed fell 12.2%and CO₂ per nautical mile fell 10.2%.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 20,849 t
- Methane (CH₄)
- 0.33 t
- Nitrous oxide (N₂O)
- 1.18 t
- Under EU ETS
- 13,220 t, 64% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD) | Greece |
| 2024 | Korean Register | Korea, Republic of |
A change of verifier is not in itself a sign of anything being wrong.
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, 5 of 5 vessel particulars and a name history. Not found in the sources for this vessel: AIS movements in Norwegian waters, 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.