Navalyze · Vehicle carrier · Ship

RUBY ACE

IMO: 9476757
Type: Vehicle carrier
Average cargo carried: 3,288 t
Flag (estimated): Japan
Port of registry: Tokyo
Technical efficiency: EEXI 14.80 g CO₂/t·nm

ISM company (DoC holder) in 2025: MOL SHIP MANAGEMENT (SINGAPORE) PTE. LTD. · part of MOL

Report year

2023 at a glance

From the 2023 THETIS-MRV report. Carries about 6,427 t of cargo on average.

Fuel kg/nm

94.1

Vehicle carrier median 103 kg/nm (−8%)

CO₂ per transport work (cargo)

46.2

g CO₂/t·nm · Vehicle carrier median 56.6 (−18%)

Average speed

16.4 kn

Vehicle carrier median 14.5 kn (+13%)

Fuel per day at sea

37.0 t/day

Fuel consumed

1,622 t

CO₂ emitted

5,121 t

Distance sailed

17,246 nm

CO₂ ÷ CO₂ per mile

Time at sea

1,052 h

44 days, 12% of the year

Within the vehicle carrier fleet, 2025

Set against all 506 vehicle carrier ships with a full-year 2025 report. Bigger ships burn more per mile but less per tonne of cargo, so read fuel per mile with the ship's size in mind.

Fuel kg/nmThis ship 95.8 kg/nm · median 99.9 (−4%)

79.6Ranks 187 of 506, lowest first119

Average speedThis ship 14.9 kn · median 14.4 (+3%)

12.0Faster than 63% of vehicle carrier ships15.9

CO₂ per transport work (cargo)This ship 91.0 g CO₂/t·nm · median 55.4 (+64%)

34.7Ranks 395 of 506, lowest first158

Middle 80% of shipsMiddle 50%Vehicle carrier medianThis ship

Where the emissions happen, 2023

THETIS splits each ship's CO₂ by voyage type. The split sets how much falls under the EU ETS: all of it within the EU and at berth, half of it on voyages into or out of the EU.

Between EU ports7%
From the EU37%
Into the EU54%
At berth in the EU3%

Fuel burned laden

1,581 t

98% of all fuel; 3% in ballast or unladen

CO₂ at berth

130 t

2.5% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

–

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

–

CO₂eq on top of CO₂ alone, from CH₄ and N₂O

Over the years

Full-year reports only. The Vehicle carrier median is the middle ship of all vehicle carrier ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

RUBY ACE
Vehicle carrier median

80.090.0100.0110.0

’182018’192019’202020’212021’222022’232023’242024’252025

Average speed, kn

RUBY ACE
Vehicle carrier median

12.013.014.015.016.017.0

’182018’192019’202020’212021’222022’232023’242024’252025

CO₂ per transport work (cargo), g CO₂/t·nm

RUBY ACE
Vehicle carrier median

40.060.080.0100

’182018’192019’202020’212021’222022’232023’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−0.3 kn	−2%	−4%	+92%	–	Same speed, fuel per mile down 2%; in line with the speed change.
2023→2024	−1.2 kn	+4%	−4%	+5%	–	1.2 kn slower, fuel per mile up 4%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+1.4 kn	−1%	+8%	+78%	+3%	1.4 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2021→2022	−0.2 kn	+7%	+6%	−56%	−28%	Same speed, fuel per mile up 7%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.6 kn	+3%	+7%	+28%	+38%	0.6 kn faster, fuel per mile up 3%; better than speed alone explains (hull, engine or trade).
2019→2020	+1.7 kn	−12%	−0%	+88%	−14%	1.7 kn faster, fuel per mile down 12%; better than speed alone explains (hull, engine or trade).
2018→2019	−3.5 kn	+1%	−21%	−71%	+8%	3.5 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).

Fuel per mile rises roughly with the square of speed for a given ship, so a change in speed explains much of a change in fuel per mile.

Every reporting year

One row per THETIS-MRV report. A ship that changed operator during a year has a part-year report for each.

Operation

Year	ISM company	Fuel t	CO₂ t	Distance nm	Hours at seah	Average speedknots at sea	Fuel kg/nmthis ship	CO₂ per transport work (cargo)g/t·nm, this ship	Laden fuel
2025	MOL SHIP MANAGEMENT (SINGAPORE) PTE. LTD.	3,338	10,436	34,866	2,344	14.9	95.8	91.0	61%
2024	MOL SHIP MANAGEMENT (SINGAPORE) PTE. LTD.	1,775	5,520	18,123	1,194	15.2	97.9	–	98%
2023	not published	1,622	5,121	17,246	1,052	16.4	94.1	46.2	98%
2022	not published	920	2,907	9,692	647	15.0	94.9	44.9	98%
2021	not published	1,968	6,210	22,170	1,456	15.2	88.8	62.5	78%
2020	not published	1,494	4,719	17,261	1,180	14.6	86.6	45.3	98%
2019	not published	903	2,838	9,164	711	12.9	98.6	52.6	95%
2018	not published	3,096	9,670	31,623	1,925	16.4	97.9	48.5	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Vehicle carrier median	vs Vehicle carrier	Rank	Verifier	Methods
2025	MOL SHIP MANAGEMENT (SINGAPORE) PTE. LTD.	91.0	55.4	+64%	395 of 506	ClassNK	A+C
2024	MOL SHIP MANAGEMENT (SINGAPORE) PTE. LTD.	–	–	–	–	ClassNK	C
2023	not published	46.2	56.6	−18%	103 of 417	ClassNK	C
2022	not published	44.9	57.7	−22%	96 of 463	ClassNK	C
2021	not published	62.5	59.6	+5%	254 of 459	ClassNK	C
2020	not published	45.3	57.3	−21%	95 of 449	ClassNK	C
2019	not published	52.6	59.0	−11%	144 of 426	ClassNK	C
2018	not published	48.5	62.4	−22%	64 of 434	ClassNK	C

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Vehicle carrier ships are benchmarked on CO₂ per transport work (cargo) (TW), in g CO₂/t·nm. CO₂eq adds methane and nitrous oxide and is in the public files from 2024. Rank counts from the lowest figure among that year's vehicle carrier ships. Methods: A delivery notes, B tank monitoring, C flow meters, D direct measurement. FuelEU GHG intensity is not shown: it needs fuel types, which the public file does not carry. Operators are named only from 2024, the first year the public files carry them; earlier years belong to the ship, not to any company.