Navalyze · LNG carrier · Ship

METHANE HEATHER SALLY

IMO: 9321744
Type: LNG carrier
Flag (estimated): Bermuda
Port of registry: Hamilton
Technical efficiency: EIV 11.79 g CO₂/t·nm
Fuel (estimated): LNG or an alternative fuel (no methane data to tell them apart)

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

Report year

2020 at a glance

From the 2020 THETIS-MRV report.

Fuel kg/nm

348

LNG carrier median 297 kg/nm (+17%)

CO₂ per transport work (volume)

9.52

g CO₂/m³·nm · LNG carrier median 10.7 (−11%)

Average speed

14.7 kn

LNG carrier median 14.7 kn (+0%)

Fuel per day at sea

122.7 t/day

Fuel consumed

4,422 t

CO₂ emitted

12,177 t

Distance sailed

12,714 nm

CO₂ ÷ CO₂ per mile

Time at sea

865 h

36 days, 10% of the year

Within the LNG carrier fleet, 2021

Set against all 289 LNG carrier ships with a full-year 2021 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 340 kg/nm · median 257 (+32%)

171Ranks 216 of 289, lowest first378

Average speedThis ship 13.6 kn · median 14.6 (−7%)

11.4Faster than 31% of LNG carrier ships16.7

CO₂ per transport work (volume)This ship 14.5 g CO₂/m³·nm · median 10.5 (+39%)

5.77Ranks 224 of 289, lowest first20.3

Middle 80% of shipsMiddle 50%LNG carrier medianThis ship

Where the emissions happen, 2020

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 EU24%
Into the EU74%
At berth in the EU1%

Fuel burned laden

3,290 t

74% of all fuel; 26% in ballast or unladen

CO₂ at berth

158 t

1.3% 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

METHANE HEATHER SALLY
LNG carrier median

250.0300.0350.0400.0

’182018’192019’202020’212021

Average speed, kn

METHANE HEATHER SALLY
LNG carrier median

13.014.015.016.0

’182018’192019’202020’212021

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

METHANE HEATHER SALLY
LNG carrier median

8.010.012.014.016.0

’182018’192019’202020’212021

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2020→2021	−1.1 kn	−2%	−9%	+188%	+53%	1.1 kn slower, fuel per mile down 2%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+0.8 kn	+3%	+9%	+7%	−5%	0.8 kn faster, fuel per mile up 3%; better than speed alone explains (hull, engine or trade).
2018→2019	−1.9 kn	−10%	−21%	−14%	−11%	1.9 kn slower, fuel per mile down 10%; worse than speed alone explains (fouling, weather, loading or trade).

Part-year reports are left out of these comparisons. 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
2025part-year	GasLog LNG Services Ltd.	0	0	–	0	–	–	–	–
2021LNG / alt.	not published	12,450	35,875	36,661	2,688	13.6	340	–	47%
2020LNG / alt.	not published	4,422	12,177	12,714	865	14.7	348	–	74%
2019LNG / alt.	not published	4,004	11,149	11,893	855	13.9	337	–	63%
2018LNG / alt.	not published	5,148	14,268	13,798	872	15.8	373	–	74%

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/m³·nm	LNG carrier median	vs LNG carrier	Rank	Verifier	Methods
2025part-year	GasLog LNG Services Ltd.	–	–	–	–	ABS	B+C
2021LNG / alt.	not published	14.5	10.5	+39%	224 of 289	ABS	B+C
2020LNG / alt.	not published	9.52	10.7	−11%	102 of 267	ABS	B+C
2019LNG / alt.	not published	9.97	10.9	−8%	97 of 248	ABS	B+C
2018LNG / alt.	not published	11.2	10.9	+3%	107 of 197	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.