Most Emission-Efficient Vehicle 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 2025. Lower is greener. Pick a segment and size class to see the greenest vessels first.

Segment rank (2025)

#68 of 479 vehicle carriers

CO₂ intensity

12.8 g CO₂/dwt·nm

vs segment average (16.33)

-22% 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

489

vessels ranked

8.82

greenest (g CO₂/t·nm)

15.82

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
51	POSEIDON LEADER IMO 9335965	21,449	2007	200 m	Mitsubishi - 8UEC60LSII	12.2	A
52	UNDINE IMO 9240160	28,388	2003	228 m	HSD Engine Co. Ltd. 8S60MC	12.3	A
53	GREEN OCEAN IMO 9981910	23,658	2021	200 m	MAN-B&W 7S60ME-C10	12.3	A
54	TITANIA IMO 9505053	31,108	2011	231 m	MAN - 7S60MC	12.3	A
55	AQUARIUS LEADER IMO 9158276	22,815	1998	200 m	Mitsubishi - 8UEC60LS	12.3	A
56	HOEGH TRIDENT IMO 9075709	21,423	1995	200 m	Hyundai - 7 S 60 MC	12.4	A
57	ANJI PROSPERITY IMO 1021403	24,651	2026	228 m	MAN-B&W 7S60ME-C10	12.4	A
58	HOEGH DETROIT IMO 9312470	27,100	2006	229 m	MAN - 7S60MC	12.5	A
59	SUMIRE LEADER IMO 9933999	19,476	2023	200 m	WinGD 7X62DF	12.5	A
60	HOEGH JACKSONVILLE IMO 9673379	20,578	2014	200 m	MAN - 5S60ME-C	12.6	A
61	OCEANUS HIGHWAY IMO 1046049	19,779	2024	200 m	MAN-B&W 7S60ME-C10	12.6	A
62	GAIA LEADER IMO 9536818	21,286	2011	200 m	Mitsubishi - 8UEC60LSII	12.6	A
63	VELA LEADER IMO 9158288	22,799	1998	200 m	Mitsubishi - 8UEC60LS	12.6	A
64	BLUE ASPIRE IMO 9968607	19,160	2024	200 m	6S60ME-C10-GL-coEGR	12.7	A
65	BYD SHENZHEN IMO 9993963	25,376	2025	220 m	MAN-B&W 7S60ME-C10-GI	12.7	A
66	CERULEAN ACE IMO 9973872	19,889	2024	200 m	MAN-B&W 6S60ME-C10-GI	12.7	A
67	LAKE LUGU IMO 9946087	19,070	2024	200 m	MAN-B&W 7S60ME-C10-GI	12.7	A
68	WOLFSBURG IMO 9941790	19,203	2023	200 m	MAN-B&W 6S60ME-C10-GI	12.8	A
69	MIGNON IMO 9189251	28,126	1999	228 m	MAN - 8S60MC	12.8	A
70	GUARDIAN LEADER IMO 9388716	21,182	2008	200 m	MAN - 7S60ME-C	13.0	A
71	AMPHITRITE HIGHWAY IMO 1024405	18,652	2025	200 m	MITSUI E&S Co., Ltd. Marine Propulsion Systems Div. Tamano Factory	13.0	A
72	HOEGH TRAPPER IMO 9706918	21,856	2016	200 m	MAN - 6S60ME-C	13.0	A
73	ASIAN EMPIRE IMO 9176606	25,765	1998	229 m	Hyundai - 7 S 60 MC	13.0	A
74	NEREUS HIGHWAY IMO 9974101	20,704	2024	200 m	WinGD 7X62DF	13.0	A
75	LIBERTY PEACE IMO 9777890	20,397	2017	200 m	Hyundai - 6S60ME-C	13.1	A
76	ASTERIA LEADER IMO 9531741	21,349	2010	200 m	Mitsubishi - 8UEC60LSII	13.2	A
77	PONTUS HIGHWAY IMO 9974113	19,800	2024	200 m	WinGD 7X62DF	13.2	A
78	DELPHINUS LEADER IMO 9174282	21,514	1998	200 m	Mitsubishi - 8UEC60LS	13.2	A
79	HOEGH TROTTER IMO 9710749	21,901	2016	200 m	Hyundai - 6S60ME-C	13.2	A
80	BOHEME IMO 9176565	28,360	1999	228 m	MAN - 8S60MC	13.2	A
81	MORNING LINDA IMO 9383106	28,061	2008	232 m	MAN - 7S60MC-C	13.3	A
82	LAKE SHIRASAGI IMO 1024869	19,046	2025	200 m	MAN-B&W 7S60ME-C10-GI	13.3	A
83	HERCULES LEADER IMO 9531753	21,385	2011	200 m	Mitsubishi - 8UEC60LSII	13.3	A
84	ELEKTRA IMO 9176577	28,126	1999	228 m	MAN - 8S60MC	13.3	A
85	BYD XI'AN IMO 9993975	25,422	2025	220 m	MAN-B&W 7S60ME-C10-GI	13.4	A
86	FIGARO IMO 9505041	31,143	2011	231 m	MAN - 7S60MC	13.4	A
87	TRAVIATA IMO 9700524	23,889	2019	200 m	MAN - 8S60ME-C8	13.4	A
88	CMA CGM INDIANAPOLIS IMO 9953717	19,157	2023	200 m	MAN-B&W 7S60ME-C10-GI	13.4	A
89	SIEM CONFUCIUS IMO 9841017	19,183	2020	200 m	MAN - 7S60ME-C10	13.4	A
91	FREESIA LEADER IMO 9933987	19,514	2023	200 m	Wärtsilä - 7X62DF	13.4	A
90	LAKE VILLARICA IMO 9994125	19,062	2025	200 m	MAN-B&W 7S60ME-C10-GI	13.4	A
92	LAKE VICTORIA IMO 9964302	19,200	2025	200 m	MAN-B&W 7S60ME-C10-GI	13.4	A
93	ANJI COMMONALITY IMO 9973406	19,359	2025	200 m	WinGD 7X62DF	13.5	A
96	CEPHEUS LEADER IMO 9308883	21,402	2006	200 m	Mitsubishi - 8UEC60LSII	13.5	A
97	SIEM ARISTOTLE IMO 9841029	19,183	2020	200 m	MAN - 6S60ME-C10	13.5	A
94	GRAND URANUS IMO 9472206	26,985	2012	232 m	Hyundai - 8S60ME-C8	13.5	A
95	MORNING LYNN IMO 9383429	28,092	2009	232 m	MAN - 7S60MC-C	13.5	A
98	PRECIOUS ACE IMO 9554200	19,045	2010	200 m	Mitsubishi - 8UEC60LSII	13.5	B
99	ARC HONOR IMO 9505089	28,818	2012	230 m	MAN - 8S60ME-C7	13.5	B
100	APHRODITE LEADER IMO 9335953	21,443	2007	200 m	Mitsubishi - 8UEC60LSII	13.6	B

Page 2 of 10 — 479 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 2025 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.