Most Emission-Efficient LNG Carriers

Ships ranked by AER (Annual Efficiency Ratio) — grams of CO₂ emitted per tonne of deadweight carried one nautical mile (g CO₂/dwt·nm), the IMO carbon-intensity metric behind the CII rating — from official EU MRV emissions data for reporting year 2024. Lower is greener. Pick a segment and size class to see the greenest vessels first.

Segment rank (2024)

#71 of 317 lng carriers

CO₂ intensity

5.1 g CO₂/dwt·nm

vs segment average (8.11)

-37% greener

Bulk Carrier Container Ship Oil Tanker Chemical Tanker Gas Carrier LNG Carrier General Cargo Vehicle Carrier Refrigerated Cargo Ro-Ro Cargo

Sort 🌱 Greenest first 🔧 Least efficient first — retrofit candidates

Size (DWT)

All sizes < 25,000 DWT 25k – 60k DWT 60k – 100k DWT 100k – 200k DWT > 200,000 DWT

Year

2025 2024

324

vessels ranked

0.87

greenest (g CO₂/t·nm)

6.59

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
51	GASLOG WALES IMO 9853137	93,076	2018	297 m	Wärtsilä - 5X72DF	4.9	A
52	LNGSHIPS EMPRESS IMO 9875800	94,000	2021	293 m	Wärtsilä - 5X72DF	4.9	A
53	DIAMOND GAS CRYSTAL IMO 9874454	89,846	2021	297 m	Wärtsilä - 5X72DF	5.0	A
54	DIAMOND GAS METROPOLIS IMO 9862487	89,846	2018	297 m	Hyundai - 5X72DF	5.0	A
55	HLS CARTAGENA IMO 9947691	94,927	2024	295 m	MAN - 5G70ME-C10-GI	5.0	A
56	NORTH MOUNTAIN IMO 9953511	88,798	2023	293 m	WinGD 5X72DF	5.0	A
57	GASLOG WESTMINSTER IMO 9855812	92,799	2020	297 m	HSD Engine Co. Ltd. 5X72DF	5.0	A
58	SK RESOLUTE IMO 9693173	94,665	2018	292 m	Doosan - 6X62DF	5.0	A
60	EXTREMADURA KNUTSEN IMO 9918157	95,548	2023	299 m	Hyundai Heavy Industries Co Ltd - South Korea 5X72DF	5.0	A
59	GLOBAL SEA SPIRIT IMO 9880465	93,080	2021	295 m	Hyundai - 5X72	5.0	A
61	FLEX VOLUNTEER IMO 9862463	93,608	2021	297 m	Hyundai - 5X72DF	5.1	A
63	LNG ADVENTURE IMO 9870159	88,817	2021	293 m	Wärtsilä - 5X72DF	5.1	A
62	CELSIUS GLARUS IMO 9945459	92,385	2024	299 m	HSD Engine Co Ltd - South Korea 6X62DF	5.1	A
64	MINERVA PSARA IMO 9854363	96,000	2021	295 m	MAN - 5G70ME-C9-GI	5.1	A
65	MINERVA AMORGOS IMO 9885855	88,235	2022	293 m	Wärtsilä - 5X72DF	5.1	A
68	TENERGY IMO 9892456	93,649	2022	299 m	Hyundai - 5X72DF	5.1	B
67	MINERVA LIMNOS IMO 9854375	94,834	2021	295 m	MAN - 5G70ME-C9.5	5.1	B
66	BW LILAC IMO 9758076	90,714	2018	295 m	Doosan - 5G70ME-C9-GI	5.1	B
69	ENERGY INTELLIGENCE IMO 9881201	94,649	2021	295 m	MAN - 5G70ME-C9-GI	5.1	B
70	LNG ENTERPRISE IMO 9874480	88,744	2021	293 m	Wärtsilä - 5X72DF	5.1	B
71	MEGARA IMO 9770945	95,212	2018	295 m	Doosan - 5G70ME-C9-GI	5.1	B
72	LNG ENDURANCE IMO 9874492	88,721	2021	293 m	Wärtsilä - 5X72DF	5.2	B
73	PEARL LNG IMO 9862346	94,000	2020	293 m	Wärtsilä - 5X72DF	5.2	B
74	ID'ASAH IMO 9977220	88,053	2022	290 m	5G70ME-C10-GA-EGRBP	5.2	B
75	BW CASSIA IMO 9896933	94,000	2022	295 m	MAN - 5G70ME-C10-GI	5.2	B
76	ELISA AQUILA IMO 9884473	95,132	2022	297 m	Wärtsilä - 5X72DF	5.2	B
77	GASLOG WINDSOR IMO 9819650	92,764	2020	297 m	Wärtsilä - 5X72DF	5.2	B
78	LNG ROSENROT IMO 9877133	98,936	2021	298 m	Wärtsilä - 5X72DF	5.2	B
79	LNG MEGREZ IMO 9834325	91,430	2020	295 m	CSSC - 6X72DF	5.3	B
80	ORION SUN IMO 9889916	88,592	2022	293 m	Wärtsilä - 5X72DF	5.3	B
81	LNG SCHNEEWEISSCHEN IMO 9771913	98,747	2018	298 m	MAN - 5G70ME-C9-GI	5.3	B
83	MARVEL SWALLOW IMO 9963449	93,510	2024	295 m	5G70ME-C10-GA	5.3	B
82	NUAIJAH IMO 9976903	94,325	2024	295 m	Hanwha Engine Co Ltd - South Korea 5G70ME-C10-GA-EGRBP	5.3	B
84	SEAPEAK YAMAL IMO 9781920	91,610	2019	294 m	MAN - 5G70ME-C9-GI	5.3	B
85	ENERGY PACIFIC IMO 9854612	94,649	2020	295 m	Doosan - 5G70ME-C9-GI	5.3	B
87	ALICANTE KNUTSEN IMO 9904194	95,548	2022	299 m	Wärtsilä - 5X72DF	5.3	B
86	FLEX ARTEMIS IMO 9851634	95,450	2020	295 m	MAN - 5G70ME-C9-GI	5.3	B
88	CELSIUS GIZA IMO 9945447	92,385	2023	299 m	HSD Engine Co Ltd - South Korea 6X62DF	5.3	B
89	ORION SEA IMO 9889904	88,592	2022	293 m	HSD Engine Co Ltd - South Korea 5X72DF	5.4	B
90	ENERGY INTEGRITY IMO 9859739	94,648	2021	295 m	Doosan - 5G70ME-C9-GI	5.4	B
91	SK AUDACE IMO 9693161	94,665	2017	292 m	Doosan - 6X62DF	5.4	B
92	LNG ENDEAVOUR IMO 9893606	88,798	2021	293 m	Wärtsilä - 5X72DF	5.4	B
93	VENTURE BAYOU IMO 9958846	88,001	2024	290 m	MAN-B&W 5G70ME-C10-GA	5.4	B
94	QOGIR IMO 9851787	94,000	2020	293 m	Wärtsilä - 5X72DF	5.5	B
95	MOL HESTIA IMO 9885996	93,798	2021	295 m	Wärtsilä - 5X72DF	5.5	B
98	GASLOG HOUSTON IMO 9748899	92,345	2018	290 m	Hyundai - 5X72DF	5.5	B
97	MYRINA IMO 9770933	95,378	2018	295 m	Doosan - 5G70ME-C9-GI	5.5	B
96	SM BLUEBIRD IMO 9902914	95,641	2022	299 m	Hyundai - 5X72DF	5.5	B
99	GASLOG HONG KONG IMO 9748904	92,266	2018	290 m	Hyundai - 5X72DF	5.5	B
100	ADRIANO KNUTSEN IMO 9831220	96,354	2019	299 m	Hyundai - 5G70ME-C9-GI	5.5	B

Page 2 of 7 — 317 vessels

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Engine intelligence

Which engines power the greenest fleets?

The main engine is the single largest CO₂ source on board — typically well over 80% of a ship's emissions come from propulsion. We aggregated this ranking the other way around: every engine design is scored by the measured carbon intensity of the vessels carrying it, licensee-built units merged under their design brand. The verdict from the 2024 data — modern dual-fuel designs like MAN B&W's ME-GI and WinGD's X-DF families, together with EGR/SCR-abated and ultra-long-stroke G-type engines, consistently power the most emission-friendly ships in service.

Emission-friendly engine ranking

AER (Annual Efficiency Ratio) = annual CO₂ emissions ÷ (deadweight × distance sailed), the IMO carbon-intensity metric used for CII ratings. It is built only from measured CO₂, distance and deadweight — not the self-reported cargo transport-work figure, which is unreliable. Implausible outliers (top 2% per segment) are excluded. Grade A–E reflects each vessel's rank within its segment. Source: EMSA THETIS-MRV.