Navalyze · Vehicle carrier · Ship

LIBERTY PROMISE

IMO: 9448425
Type: Vehicle carrier
Average cargo carried: 7,406 t
Flag (estimated): United States
Port of registry: New York
Technical efficiency: EIV 15.62 g CO₂/t·nm

Report year

2018 at a glance

From the 2018 THETIS-MRV report. Carries about 4,744 t of cargo on average.

Fuel kg/nm

106

Ro-ro median 108 kg/nm (−2%)

CO₂ per transport work (cargo)

69.5

g CO₂/t·nm · Ro-ro median 91.0 (−24%)

Average speed

16.1 kn

Ro-ro median 14.7 kn (+10%)

Fuel per day at sea

40.7 t/day

Fuel consumed

1,377 t

CO₂ emitted

4,295 t

Distance sailed

13,023 nm

CO₂ ÷ CO₂ per mile

Time at sea

811 h

34 days, 9% of the year

Within the vehicle carrier fleet, 2022

Set against all 463 vehicle carrier ships with a full-year 2022 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 105 kg/nm · median 108 (−3%)

84.1Ranks 203 of 463, lowest first133

Average speedThis ship 16.5 kn · median 14.4 (+15%)

11.8Faster than 94% of vehicle carrier ships16.2

CO₂ per transport work (cargo)This ship 44.0 g CO₂/t·nm · median 57.7 (−24%)

40.4Ranks 89 of 463, lowest first122

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 ports0%
From the EU40%
Into the EU56%
At berth in the EU4%

Fuel burned laden

956 t

69% of all fuel; 31% in ballast or unladen

CO₂ at berth

154 t

3.6% 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 PROMISE
Vehicle carrier median

100.0110.0120.0130.0140.0

’182018’192019’202020’212021’222022

Average speed, kn

LIBERTY PROMISE
Vehicle carrier median

14.015.016.017.018.0

’182018’192019’202020’212021’222022

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

LIBERTY PROMISE
Vehicle carrier median

40.060.080.0100120

’182018’192019’202020’212021’222022

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2021→2022	+0.4 kn	−8%	−5%	+44%	−50%	0.4 kn faster, fuel per mile down 8%; better than speed alone explains (hull, engine or trade).
2020→2021	−1.1 kn	+6%	−1%	−34%	+45%	1.1 kn slower, fuel per mile up 6%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	−0.1 kn	−18%	−19%	−12%	+6%	Same speed, fuel per mile down 18%; better than speed alone explains (hull, engine or trade).
2018→2019	+1.2 kn	+23%	+33%	+70%	−17%	1.2 kn faster, fuel per mile up 23%; 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
2022	not published	1,939	6,046	18,549	1,126	16.5	105	44.0	–
2021	not published	1,460	4,565	12,915	802	16.1	113	88.3	–
2020	not published	2,080	6,484	19,562	1,135	17.2	106	61.1	100%
2019	not published	2,889	9,007	22,198	1,283	17.3	130	57.7	100%
2018	not published	1,377	4,295	13,023	811	16.1	106	69.5	69%

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Vehicle carrier median	vs Vehicle carrier	Rank	Verifier	Methods
2022	not published	44.0	57.7	−24%	89 of 463	DNV	C
2021	not published	88.3	59.6	+48%	365 of 459	DNV	C
2020	not published	61.1	103	−41%	40 of 238	ABS	–
2019	not published	57.7	90.9	−37%	43 of 271	ABS	C
2018	not published	69.5	91.0	−24%	70 of 260	ABS	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.