Navalyze · Other · Ship

LIBERTY POWER

IMO: 9578957
Type: Other ship types
Average cargo carried: 2,483 t
Flag (estimated): United States
Port of registry: New York, Ny
Ice class: IB
Former names: JOLLY DIAMANTE

ISM company (DoC holder) in 2025: Liberty Maritime Corporation

Report year

2023 at a glance

From the 2023 THETIS-MRV report.

Fuel kg/nm

151

CO₂ per transport work (cargo)

–

g CO₂/t·nm

Average speed

15.2 kn

Fuel per day at sea

55.0 t/day

Fuel consumed

2,794 t

CO₂ emitted

8,732 t

Distance sailed

18,548 nm

CO₂ ÷ CO₂ per mile

Time at sea

1,220 h

51 days, 14% of the year

Within the other fleet, 2025

Set against all 159 other 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 149 kg/nm · median 87.2 (+71%)

47.6Ranks 137 of 159, lowest first161

Average speedThis ship 14.2 kn · median 10.4 (+37%)

5.8Faster than 91% of other ships13.4

CO₂ per transport work (cargo)This ship 188 g CO₂/t·nm · median 86.7 (+117%)

30.8Ranks 112 of 159, lowest first600

Middle 80% of shipsMiddle 50%Other 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 ports9%
From the EU22%
Into the EU65%
At berth in the EU3%

Fuel burned laden

–

Not reported

CO₂ at berth

295 t

3.4% 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 Other median is the middle ship of all other ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

LIBERTY POWER
Other median

75.0100.0125.0150.0175.0

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

Average speed, kn

LIBERTY POWER
Other median

10.012.014.016.018.0

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

CO₂ per transport work (volume), g CO₂/m³·nm

LIBERTY POWER
Other median

0.050.0100150200

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

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−2.5 kn	+38%	+17%	+1,482%	–	2.5 kn slower, fuel per mile up 38%; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	+1.5 kn	−28%	−21%	−88%	–	1.5 kn faster, fuel per mile down 28%; better than speed alone explains (hull, engine or trade).
2022→2023	+0.8 kn	+5%	+11%	−24%	–	0.8 kn faster, fuel per mile up 5%; better than speed alone explains (hull, engine or trade).
2021→2022	+0.9 kn	−12%	−6%	+46%	+24%	0.9 kn faster, fuel per mile down 12%; better than speed alone explains (hull, engine or trade).
2020→2021	−0.1 kn	+2%	+1%	−25%	+20%	Same speed, fuel per mile up 2%; in line with the speed change.
2019→2020	+1.5 kn	−2%	+10%	+27%	−5%	1.5 kn faster, fuel per mile down 2%; better than speed alone explains (hull, engine or trade).
2018→2019	+1.9 kn	−4%	+14%	−17%	−8%	1.9 kn faster, fuel per mile down 4%; 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	Liberty Maritime Corporation	5,278	16,540	35,420	2,503	14.2	149	188	–
2024	Liberty Maritime Corporation	242	756	2,239	134	16.7	108	–	–
2023	not published	2,794	8,732	18,548	1,220	15.2	151	–	–
2022	not published	3,517	10,957	24,432	1,699	14.4	144	–	–
2021	not published	2,744	8,546	16,754	1,241	13.5	164	–	–
2020	not published	3,591	11,185	22,412	1,644	13.6	160	–	–
2019	not published	2,876	8,962	17,580	1,449	12.1	164	–	–
2018	not published	3,593	11,190	21,105	2,069	10.2	170	–	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Other median	vs Other	Rank	Verifier	Methods
2025	Liberty Maritime Corporation	188	86.7	+117%	112 of 159	DNV	B+C
2024	Liberty Maritime Corporation	–	–	–	–	DNV	A+C
2023	not published	–	–	–	–	DNV	A+C
2022	not published	10.2	7.68	+33%	48 of 59	ABS	C
2021	not published	8.23	8.10	+2%	33 of 62	RINA	B
2020	not published	6.83	8.53	−20%	14 of 69	RINA	B
2019	not published	7.21	9.58	−25%	15 of 67	RINA	B
2018	not published	7.80	11.6	−33%	17 of 65	RINA	B

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Other 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 other 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.