Navalyze · LNG carrier · Ship

MARAN GAS EFESSOS

IMO: 9627497
Type: LNG carrier
Flag (estimated): Greece
Port of registry: Piraeus
Technical efficiency: EIV 6.16 g CO₂/t·nm
Fuel (estimated): Mostly LNG

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

Report year

2023 at a glance

From the 2023 THETIS-MRV report.

Fuel kg/nm

211

LNG carrier median 231 kg/nm (−8%)

CO₂ per transport work (volume)

7.33

g CO₂/m³·nm · LNG carrier median 9.10 (−19%)

Average speed

10.2 kn

LNG carrier median 14.2 kn (−28%)

Fuel per day at sea

51.5 t/day

Fuel consumed

8,297 t

CO₂ emitted

23,878 t

Distance sailed

39,263 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,865 h

161 days, 44% 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 165 kg/nm · median 190 (−13%)

152Ranks 81 of 386, lowest first319

Average speedThis ship 15.2 kn · median 14.4 (+6%)

11.2Faster than 77% of LNG carrier ships15.9

CO₂ per transport work (volume)This ship 5.66 g CO₂/m³·nm · median 7.12 (−21%)

5.06Ranks 106 of 386, lowest first16.1

Middle 80% of shipsMiddle 50%LNG 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 ports0%
From the EU30%
Into the EU67%
At berth in the EU3%

Fuel burned laden

–

Not reported

CO₂ at berth

635 t

2.7% 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

MARAN GAS EFESSOS
LNG carrier median

150.0200.0250.0300.0350.0400.0

’202020’222022’232023’252025

Average speed, kn

MARAN GAS EFESSOS
LNG carrier median

10.012.014.016.0

’202020’222022’232023’252025

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

MARAN GAS EFESSOS
LNG carrier median

4.06.08.010.012.014.0

’202020’222022’232023’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2023→2025	+5.0 kn	−22%	+17%	−39%	−23%	5.0 kn faster, fuel per mile down 22%; better than speed alone explains (hull, engine or trade).
2022→2023	−4.0 kn	−40%	−57%	+1,101%	−40%	4.0 kn slower, fuel per mile down 40%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2022	−1.6 kn	+56%	+40%	−79%	+54%	1.6 kn slower, fuel per mile up 56%; 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
2025LNG	MARAN GAS MARITIME INC.	3,947	10,561	23,891	1,569	15.2	165	–	99%
2023LNG / alt.	not published	8,297	23,878	39,263	3,865	10.2	211	–	–
2022LNG / alt.	not published	1,151	3,181	3,268	230	14.2	352	–	–
2020LNG / alt.	not published	3,431	9,447	15,228	961	15.8	225	–	–

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.	5.66	7.12	−21%	106 of 386	ABS	A
2023LNG / alt.	not published	7.33	9.10	−19%	125 of 355	ABS	A
2022LNG / alt.	not published	12.2	10.4	+18%	243 of 379	ABS	A
2020LNG / alt.	not published	7.94	10.7	−26%	51 of 267	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.