Navalyze · LNG carrier · Ship

METHANE HEATHER SALLY

IMO: 9321744
Type: LNG carrier
Port of registry: Hamilton
Technical efficiency: EIV 11.79 g CO₂/t·nm
Fuel: Mostly LNG

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

Report year

2021 at a glance

From the 2021 THETIS-MRV report.

Fuel per mile

339.6 kg/nm

LNG carrier median 256.6 kg/nm (+32%)

CO₂ per transport work (volume)

14.54

g CO₂/m³·nm · LNG carrier median 10.46 (+39%)

Average speed

13.6 kn

LNG carrier median 14.6 kn (−7%)

Fuel per day at sea

111.2 t/day

Fuel consumed

12,450 t

CO₂ emitted

35,875 t

Distance sailed

36,661 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,688 h

112 days, 31% 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 per mileThis ship 339.6 kg/nm · median 256.6 (+32%)

170.7Ranks 216 of 289, lowest first378.2

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 14.54 g CO₂/m³·nm · median 10.46 (+39%)

5.77Ranks 224 of 289, lowest first20.28

Middle 80% of shipsMiddle 50%LNG carrier medianThis ship

Where the emissions happen, 2021

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 EU54%
Into the EU45%
At berth in the EU2%

Fuel burned laden

47%

53% in ballast or unladen

CO₂ at berth

1.6%

Alongside in EU ports

Methane (CH₄)

–

LNG engines slip unburnt methane

CO₂eq ÷ CO₂

–

Uplift from CH₄ and N₂O, counted in full from 2026

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 per mile, 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	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	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	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2025part-year	GasLog LNG Services Ltd.	0	0	–	0	–	–	–	–
2021LNG	not published	12,450	35,875	36,661	2,688	13.6	339.6	–	47%
2020LNG	not published	4,422	12,177	12,714	865	14.7	347.8	–	74%
2019LNG	not published	4,004	11,149	11,893	855	13.9	336.6	–	63%
2018LNG	not published	5,148	14,268	13,798	872	15.8	373.1	–	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	not published	14.54	10.46	+39%	224 of 289	ABS	B+C
2020LNG	not published	9.52	10.71	−11%	102 of 267	ABS	B+C
2019LNG	not published	9.97	10.87	−8%	97 of 248	ABS	B+C
2018LNG	not published	11.21	10.92	+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.