Vehicle carrier · Liberia flag · built 2012
ONYX ACE: CO₂ emissions 2018–2025
IMO 9539212 MMSI 636016096EU ETS6 reporting years
- CO₂ reported 2025
- 10,942 t
- Fuel burned
- 3,488 t
- Distance
- 35,700 nm
- Time at sea
- 2,188 h
- Emitted at berth
- 2% of total
- Share of year under way
- 25%
- Gross tonnage
- 60,131
ONYX ACE against its type
Built in 2012, it is 4 years newer than the median vehicle carrier on this register, which was built in 2008 (595 vessels with a known build year). At 60,131 gross tonnage it is larger than 64% of the other 571 vehicle carriers with a recorded tonnage. It is one of 89 vehicle carriers here under the Liberia flag, 12.5% of the 713 on the register. The returns for 2018–2025 all give MONROVIA as port of registry.
Its 10,942 t of CO₂ for 2025 is 1.5 times the median of 7,074 t among the 514 vehicle carriers on this register that reported for 2025. Per nautical mile it emitted 306.5 kg CO₂, close to the type median of 309.1 kg. It logged 2,188 hours at sea against a median of 1,639 hours for its type that year. 1.8% of its 2025 emissions were at berth; the median for vehicle carriers was 3.1%. Across 6 years with reported emissions, the highest was 2025 (10,942 t) and the lowest 2020 (2,976 t). Its efficiency percentile within the type went from 44 in 2018 to 76 in 2025 (lower is more efficient). Of the 7 comparable vessels listed below with a 2025 return, 5 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 | 10,942 | 3,488 | 35,700 | 2,188 | 196 | 306.5 | 74.7 | 76 |
| 2023 | 5,911 | 1,873 | 20,880 | 1,371 | 100 | 283.1 | 56.7 | 56 |
| 2022 | 10,355 | 3,281 | 34,184 | 2,080 | 202 | 302.9 | 53.5 | 46 |
| 2020 | 2,976 | 941 | 11,276 | 885 | 75 | 263.9 | 53.4 | 46 |
| 2019 | 3,986 | 1,275 | 14,188 | 1,122 | 119 | 281.0 | 58.9 | 50 |
| 2018 | 4,202 | 1,345 | 14,594 | 1,002 | 149 | 287.9 | 59.3 | 44 |
Vessel particulars
- IMO number
- 9539212
- MMSI
- 636016096
- Ship type
- Vehicle carrier
- Gross tonnage
- 60,131
- Length overall
- 199.0 m
- Beam
- 32.0 m
- Year built
- 2012
- Flag state
- Liberia per EU MRV 2025
- Port of registry
- Monrovia MRV 2025
- Technical efficiency (design)
- EEXI (14.9 gCO₂/t·nm)
- Verifier
- Nippon Kaiji Kyokai, Japan
- Accreditation
- VS-21325-01
- Compliance document issued
- 2026-03-10
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 322 of 423 qualifying vehicle carriers by EEOI, at the 76th percentile. The dashed line is the type median, 51.7; this vessel reported 74.7.
EEOI divides emissions by transport work, which for this vessel and year was 146,416,031 tonne-miles over 35,700 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 160.4% higher than in 2018, for EU/EEA voyages only. No return is recorded for 2021, 2024, so the series has gaps.
From 2023 to 2025, emissions rose 85.1% while distance sailed rose 71.0%and CO₂ per nautical mile rose 8.3%.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
- 11,113 t
- Methane (CH₄)
- 0.17 t
- Nitrous oxide (N₂O)
- 0.63 t
- Under EU ETS
- 5,875 t, 54% of total
Laden voyages2025
- CO₂ on laden voyages
- 6,502 t, 59% of total
- Fuel, laden
- 2,068 t
The rest of the 2025 total was emitted on ballast legs or at berth.
Observed movementsAIS · Norwegian waters
- First seen
- 08 Apr 2026
- Last seen
- 09 Apr 2026
- Days observed
- 2
- Positions
- 249
- Median speed
- 14.8 kn
Its recorded positions span 58.0°N to 59.7°N and 8.7°E to 10.7°E.
30 hourly points from 249 positions. Filled circle first, open circle last; squares are ports for orientation, not calls.
Norwegian Coastal Administration open AIS, Norwegian waters only, 01 Jul 2025 to 27 Jul 2026. A gap means the vessel was not recorded here, not that it was idle or that a transponder was off.
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).
- Movements: Norwegian Coastal Administration open AIS extract.
This page draws on 6 MRV reporting years, an efficiency ranking, 4 of 5 vessel particulars and AIS movements in Norwegian waters. Not found in the sources for this vessel: 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.