Navalyze · LNG carrier · Ship

ISABELLA

IMO: 9874820
Type: LNG carrier
Flag (estimated): Greece
Port of registry: Piraeus
Technical efficiency: EEDI 4.75 g CO₂/t·nm
Fuel (estimated): Mostly LNG

ISM company (DoC holder) in 2025: MARAN GAS MARITIME INC. · part of Maran

Report year

2022 at a glance

From the 2022 THETIS-MRV report.

Fuel kg/nm

197

LNG carrier median 252 kg/nm (−22%)

CO₂ per transport work (volume)

6.93

g CO₂/m³·nm · LNG carrier median 10.4 (−33%)

Average speed

14.0 kn

LNG carrier median 14.1 kn (−1%)

Fuel per day at sea

66.0 t/day

Fuel consumed

13,703 t

CO₂ emitted

39,109 t

Distance sailed

69,636 nm

CO₂ ÷ CO₂ per mile

Time at sea

4,982 h

208 days, 57% of the year

Within the LNG carrier fleet, 2025

Set against all 386 LNG 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 181 kg/nm · median 190 (−5%)

152Ranks 154 of 386, lowest first319

Average speedThis ship 15.1 kn · median 14.4 (+5%)

11.2Faster than 72% of LNG carrier ships15.9

CO₂ per transport work (volume)This ship 6.82 g CO₂/m³·nm · median 7.12 (−4%)

5.06Ranks 179 of 386, lowest first16.1

Middle 80% of shipsMiddle 50%LNG carrier medianThis ship

Where the emissions happen, 2022

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 EU49%
Into the EU49%
At berth in the EU2%

Fuel burned laden

–

Not reported

CO₂ at berth

673 t

1.7% 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 LNG carrier median is the middle ship of all LNG carrier ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

ISABELLA
LNG carrier median

180.0200.0220.0240.0260.0

’222022’232023’242024’252025

Average speed, kn

ISABELLA
LNG carrier median

14.014.515.015.516.0

’222022’232023’242024’252025

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

ISABELLA
LNG carrier median

6.07.08.09.010.011.0

’222022’232023’242024’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−0.5 kn	−10%	−13%	+52%	−8%	0.5 kn slower, fuel per mile down 10%; in line with the speed change.
2023→2024	+0.1 kn	+5%	+6%	−55%	+12%	Same speed, fuel per mile up 5%; in line with the speed change.
2022→2023	+1.5 kn	−2%	+8%	+59%	−4%	1.5 kn faster, fuel per mile down 2%; 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
2025LNG	MARAN GAS MARITIME INC.	13,652	37,767	75,275	4,987	15.1	181	–	97%
2024LNG	MARAN GAS MARITIME INC.	9,997	27,154	49,574	3,179	15.6	202	–	98%
2023LNG / alt.	not published	21,361	59,452	110,802	7,169	15.5	193	–	–
2022LNG / alt.	not published	13,703	39,109	69,636	4,982	14.0	197	–	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/m³·nm	LNG carrier median	vs LNG carrier	Rank	Verifier	Methods
2025LNG	MARAN GAS MARITIME INC.	6.82	7.12	−4%	179 of 386	ABS	A
2024LNG	MARAN GAS MARITIME INC.	7.42	7.39	+0%	157 of 312	ABS	A
2023LNG / alt.	not published	6.65	9.10	−27%	92 of 355	ABS	A
2022LNG / alt.	not published	6.93	10.4	−33%	84 of 379	ABS	A

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. LNG carrier ships are benchmarked on CO₂ per transport work (volume) (TW), in g CO₂/m³·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 LNG 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.