Navalyze · Vehicle carrier · Ship

LIBERTY ACE

IMO: 9293650
Type: Vehicle carrier
Average cargo carried: 1,787 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

2018 at a glance

From the 2018 THETIS-MRV report. Carries about 4,666 t of cargo on average.

Fuel kg/nm

91.1

Vehicle carrier median 104 kg/nm (−13%)

CO₂ per transport work (cargo)

61.1

g CO₂/t·nm · Vehicle carrier median 62.4 (−2%)

Average speed

13.6 kn

Vehicle carrier median 14.7 kn (−7%)

Fuel per day at sea

29.7 t/day

Fuel consumed

1,588 t

CO₂ emitted

4,967 t

Distance sailed

17,434 nm

CO₂ ÷ CO₂ per mile

Time at sea

1,283 h

53 days, 15% 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 83.4 kg/nm · median 99.9 (−17%)

79.6Ranks 68 of 506, lowest first119

Average speedThis ship 11.8 kn · median 14.4 (−18%)

12.0Faster than 8% of vehicle carrier ships15.9

CO₂ per transport work (cargo)This ship 149 g CO₂/t·nm · median 55.4 (+169%)

34.7Ranks 450 of 506, lowest first158

Middle 80% of shipsMiddle 50%Vehicle carrier medianThis ship

Where the emissions happen, 2018

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 ports13%
From the EU30%
Into the EU53%
At berth in the EU3%

Fuel burned laden

–

Not reported

CO₂ at berth

173 t

3.5% 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

LIBERTY ACE
Vehicle carrier median

70.080.090.0100.0110.0

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

Average speed, kn

LIBERTY ACE
Vehicle carrier median

8.010.012.014.016.0

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

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

LIBERTY ACE
Vehicle carrier median

0.0200400600

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

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2023→2025	+2.7 kn	−7%	+20%	+1,430%	−74%	2.7 kn faster, fuel per mile down 7%; better than speed alone explains (hull, engine or trade).
2022→2023	−5.6 kn	−16%	−48%	−36%	+951%	5.6 kn slower, fuel per mile down 16%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+0.8 kn	+50%	+58%	−95%	−24%	0.8 kn faster, fuel per mile up 50%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2021	−0.7 kn	−26%	−29%	−50%	−12%	0.7 kn slower, fuel per mile down 26%; better than speed alone explains (hull, engine or trade).
2018→2019	+1.0 kn	+6%	+14%	+29%	+32%	1.0 kn faster, fuel per mile up 6%; better than speed alone explains (hull, engine 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.	432	1,381	5,186	438	11.8	83.4	149	48%
2023	not published	30	96	339	37	9.1	89.6	565	85%
2022	not published	57	177	531	36	14.7	107	53.7	98%
2021	not published	808	2,554	11,295	812	13.9	71.5	71.1	99%
2019	not published	2,173	6,826	22,447	1,540	14.6	96.8	80.5	95%
2018	not published	1,588	4,967	17,434	1,283	13.6	91.1	61.1	–

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.	149	55.4	+169%	450 of 506	ClassNK	C
2023	not published	565	56.6	+897%	416 of 417	ClassNK	C
2022	not published	53.7	57.7	−7%	198 of 463	ClassNK	C
2021	not published	71.1	59.6	+19%	308 of 459	ClassNK	C
2019	not published	80.5	59.0	+37%	325 of 426	ClassNK	C
2018	not published	61.1	62.4	−2%	207 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.