Navalyze · LNG carrier · Ship

GASLOG WINDSOR

IMO: 9819650
Type: LNG carrier
Flag (estimated): Bermuda
Port of registry: Hamilton
Technical efficiency: EEDI 4.82 g CO₂/t·nm
Fuel (estimated): Mostly LNG

ISM company (DoC holder) in 2025: GasLog LNG Services Ltd.

Report year

2023 at a glance

From the 2023 THETIS-MRV report.

Fuel kg/nm

167

LNG carrier median 231 kg/nm (−28%)

CO₂ per transport work (volume)

4.99

g CO₂/m³·nm · LNG carrier median 9.10 (−45%)

Average speed

13.4 kn

LNG carrier median 14.2 kn (−6%)

Fuel per day at sea

53.8 t/day

Fuel consumed

7,977 t

CO₂ emitted

22,241 t

Distance sailed

47,851 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,558 h

148 days, 41% 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 184 kg/nm · median 190 (−3%)

152Ranks 172 of 386, lowest first319

Average speedThis ship 13.9 kn · median 14.4 (−3%)

11.2Faster than 38% of LNG carrier ships15.9

CO₂ per transport work (volume)This ship 6.65 g CO₂/m³·nm · median 7.12 (−7%)

5.06Ranks 173 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 EU39%
Into the EU59%
At berth in the EU2%

Fuel burned laden

–

Not reported

CO₂ at berth

465 t

2.1% 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

GASLOG WINDSOR
LNG carrier median

150.0200.0250.0300.0

’202020’212021’222022’232023’242024’252025

Average speed, kn

GASLOG WINDSOR
LNG carrier median

13.013.514.014.515.015.5

’202020’212021’222022’232023’242024’252025

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

GASLOG WINDSOR
LNG carrier median

4.06.08.010.012.0

’202020’212021’222022’232023’242024’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	+0.2 kn	+3%	+4%	−36%	+16%	Same speed, fuel per mile up 3%; in line with the speed change.
2023→2024	+0.3 kn	+8%	+10%	+4%	+15%	Same speed, fuel per mile up 8%; in line with the speed change.
2022→2023	−0.5 kn	−34%	−36%	+89%	−46%	0.5 kn slower, fuel per mile down 34%; better than speed alone explains (hull, engine or trade).
2021→2022	+0.1 kn	+53%	+53%	+39%	+60%	Same speed, fuel per mile up 53%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	−1.6 kn	−4%	−14%	−56%	−8%	1.6 kn slower, fuel per mile down 4%; 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	GasLog LNG Services Ltd.	5,900	16,178	32,049	2,302	13.9	184	–	–
2024LNG	GasLog LNG Services Ltd.	8,935	24,198	49,744	3,634	13.7	180	–	–
2023LNG / alt.	not published	7,977	22,241	47,851	3,558	13.4	167	–	–
2022	not published	6,417	19,156	25,261	1,822	13.9	254	–	37%
2021LNG / alt.	not published	3,025	8,350	18,195	1,316	13.8	166	–	52%
2020LNG / alt.	not published	7,217	20,304	41,594	2,704	15.4	174	–	48%

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/m³·nm	LNG carrier median	vs LNG carrier	Rank	Verifier	Methods
2025LNG	GasLog LNG Services Ltd.	6.65	7.12	−7%	173 of 386	ABS	B+C
2024LNG	GasLog LNG Services Ltd.	5.73	7.39	−22%	89 of 312	ABS	B+C
2023LNG / alt.	not published	4.99	9.10	−45%	20 of 355	ABS	B+C
2022	not published	9.22	10.4	−11%	163 of 379	ABS	B+C
2021LNG / alt.	not published	5.77	10.5	−45%	30 of 289	ABS	B+C
2020LNG / alt.	not published	6.27	10.7	−41%	14 of 267	ABS	B+C

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.