Vehicle carrier · Japan flag · built 2010

RUBY ACE: CO₂ emissions 2018–2025

IMO 9476757 EU ETS8 reporting years

CO₂ reported 2025: 10,436 t
Fuel burned: 3,338 t
Distance: 34,866 nm
Time at sea: 2,344 h
Emitted at berth: 2% of total
Share of year under way: 27%
Gross tonnage: 60,148

RUBY ACE against its type

Built in 2010, it is 2 years newer than the median vehicle carrier on this register, which was built in 2008 (595 vessels with a known build year). At 60,148 gross tonnage it is larger than 65% of the other 571 vehicle carriers with a recorded tonnage. It is one of 66 vehicle carriers here under the Japan flag, 9.3% of the 713 on the register. The reported port of registry changed: GEORGE TOWN (2018–2021), then TOKYO (2022–2025).

Its 10,436 t of CO₂ for 2025 is 48% above the median of 7,074 t among the 514 vehicle carriers on this register that reported for 2025. Per nautical mile it emitted 299.3 kg CO₂, close to the type median of 309.1 kg. It logged 2,344 hours at sea against a median of 1,639 hours for its type that year. 2.3% of its 2025 emissions were at berth; the median for vehicle carriers was 3.1%. Across 8 years with reported emissions, the highest was 2025 (10,436 t) and the lowest 2019 (2,838 t). Its efficiency percentile within the type went from 14 in 2018 to 85 in 2025 (lower is more efficient). Of the 8 comparable vessels listed below with a 2025 return, 2 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	10,436	3,338	34,866	2,344	242	299.3	91.0	85
2024	5,520	1,775	—	1,194	0	304.6	—	—
2023	5,121	1,622	17,246	1,052	130	296.9	46.2	28
2022	2,907	920	9,692	647	64	299.9	44.9	23
2021	6,210	1,968	22,170	1,456	157	280.1	62.5	58
2020	4,719	1,494	17,261	1,180	100	273.4	45.3	22
2019	2,838	903	9,164	711	156	309.7	52.6	34
2018	9,670	3,096	31,622	1,925	139	305.8	48.5	14

Vessel particulars

IMO number: 9476757
Ship type: Vehicle carrier
Gross tonnage: 60,148
Year built: 2010
Flag state: Japan per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list Cayman Islands. The flag shown is from the newest official source, the EU MRV return for 2025.
Port of registry: Tokyo MRV 2025
Technical efficiency (design): EEXI (14.8 gCO₂/t·nm)
Verifier: Nippon Kaiji Kyokai, Japan
Accreditation: VS-21325-01
Compliance document issued: 2026-03-06
Compliance document expires: 2027-06-30

Efficiency against its own type2025

Position 360 of 423 qualifying vehicle carriers by EEOI, at the 85th percentile. The dashed line is the type median, 51.7; this vessel reported 91.0.

EEOI divides emissions by transport work, which for this vessel and year was 114,646,051 tonne-miles over 34,866 nautical miles.

Reported CO₂ by year

Reported CO₂ in 2025 was 7.9% higher than in 2018, for EU/EEA voyages only.

From 2024 to 2025, emissions rose 89.1% and CO₂ per nautical mile fell 1.7%.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: 10,600 t
Methane (CH₄): 0.17 t
Nitrous oxide (N₂O): 0.60 t
Under EU ETS: 6,128 t, 59% of total

Laden voyages2025

CO₂ on laden voyages: 6,414 t, 61% of total
Fuel, laden: 2,050 t

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 2018–2025, published by the European Commission.
Vessel particulars: Wikidata (CC0).

This page draws on 8 MRV reporting years, an efficiency ranking and 3 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.