Most Emission-Efficient General Cargos

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)

#1,078 of 2,380 general cargos

CO₂ intensity

13.8 g CO₂/dwt·nm

vs segment average (13.96)

-1% 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

2,429

vessels ranked

3.13

greenest (g CO₂/t·nm)

14.48

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
1051	RAMUS IMO 9318400	6,063	2005	100 m	Guangzhou Diesel 8320ZCD-6	13.7	C
1052	HAPPY DRAGON IMO 9551961	18,103	2011	157 m	Wärtsilä - 8L46	13.7	C
1053	SAXONA IMO 9371024	5,069	2006	100 m	CHINA G8300ZC18B	13.7	C
1054	ANHOLT IMO 9968205	5,217	2024	90 m	MAK/Caterpillar - 6M25E	13.7	C
1057	SKY DOLPHIN IMO 1029039	3,802	2025	90 m	A.B.C. 6DZC	13.7	C
1056	ONEGO ELBE IMO 9438573	11,087	2008	143 m	MAK/Caterpillar - 9M32C	13.7	C
1055	DIAMANTGRACHT IMO 9420813	17,966	2009	157 m	Wärtsilä - 8L46	13.7	C
1058	BBC RAINBOW IMO 9423516	18,019	2010	162 m	MAN - 9S50MC-C	13.7	C
1060	NORAN IMO 9175822	8,595	1997	100 m	Akasaka - 6UEC33LSII	13.7	C
1059	EMS LUNA IMO 1022275	4,672	2024	94 m	Hanshin LH28LRG	13.7	C
1061	FINN II IMO 9534468	10,049	2012	116 m	MAK/Caterpillar - 8M32C	13.7	C
1062	HIIUMAA IMO 9973286	5,962	2024	100 m	MAN 6L27/38	13.7	C
1064	JUMBO IMO 8518297	3,697	1987	88 m	MAK/Caterpillar - 6M452AK	13.8	C
1063	NAVIN FALCON IMO 9492933	7,933	2008	113 m	Daihatsu - 8DKM-28	13.8	C
1066	FWN STAR IMO 9721645	10,549	2015	122 m	MAK/Caterpillar - 6M32C	13.8	C
1065	INDUSTRIAL SONG IMO 9750464	12,292	2017	145 m	STX - 5G45ME-C9	13.8	C
1067	ESL AFRICA IMO 9397171	17,356	2007	143 m	Wärtsilä - 8 L 46 B	13.8	C
1068	LADY RUBINA IMO 9370109	13,464	2008	138 m	MAN - 7 S 35 MC	13.8	C
1069	DOGGERSBANK IMO 9341768	6,665	2006	111 m	MAK/Caterpillar - 8M25	13.8	C
1071	SLOMAN DISCHARGER IMO 9463578	12,962	2011	138 m	MAK/Caterpillar - 6 M 43 C	13.8	C
1070	KATJA IMO 9454838	6,684	2009	114 m	MAK/Caterpillar - 9M25C	13.8	C
1073	BALTIC DREAM IMO 9969522	3,718	2025	88 m	—	13.8	C
1072	BIRKHOLM IMO 9968229	5,213	2024	90 m	MAK/Caterpillar - 6M25E	13.8	C
1074	KAREN C IMO 9523952	6,794	2010	106 m	MAK/Caterpillar - 6M25C	13.8	C
1075	SINGELGRACHT IMO 9197375	21,311	2000	168 m	Wärtsilä - 6L64	13.8	C
1076	YANGZE VENUS IMO 9428401	12,094	2013	137 m	Wärtsilä - 6L46A	13.8	C
1077	RESAT AGA IMO 9545467	6,616	2009	104 m	SHAANXI DIESEL HEAVY INDUSTRY CO.,LTD. CHINA 8DKM-28	13.8	C
1081	MY MELODY IMO 9006382	3,713	1994	88 m	MWM - SBV8M628	13.8	C
1080	C.ATLAS IMO 9199141	3,683	2003	88 m	Deutz - SBV8M628	13.8	C
1079	BBC NAGASAKI IMO 9559872	9,717	2011	132 m	ROLLS-ROYCE MARINE AS, ENGINES DPT BERGEN B32:40L8P	13.8	C
1078	UNISUN IMO 9448451	9,825	2009	132 m	MAK/Caterpillar - MAK 8 M 32 C	13.8	C
1082	JSP FALSTER IMO 9968152	5,231	2023	90 m	MaK 6M25E	13.8	C
1083	PENHAR IMO 9534365	6,500	2010	118 m	MAK/Caterpillar - 6L26A	13.9	C
1084	AMBER TRADER IMO 9180853	6,320	1998	101 m	MWM - TBD645L6	13.9	C
1085	JSP SAMSØ IMO 9968217	5,198	2024	90 m	MAN 6L27/38	13.9	C
1086	SCHIPPERSGRACHT IMO 9197363	21,311	2000	168 m	Wärtsilä - 6L64	13.9	C
1087	BILLIE IMO 9488047	12,696	2011	138 m	MAK/Caterpillar - 6M43	13.9	C
1088	TALI IMO 9173692	13,340	1998	137 m	Wärtsilä - 8R46A	13.9	C
1089	TRANSUND IMO 9213088	16,612	2002	142 m	MAN - 7S42MC	13.9	C
1092	ONEGO EMS IMO 9290074	10,683	2004	146 m	MAK/Caterpillar - MAK 9M32C	13.9	C
1091	SPAARNEGRACHT IMO 9202558	21,311	2000	168 m	Wärtsilä - 6L64	13.9	C
1090	YI HUI REN HAI IMO 9628685	12,312	2013	125 m	Daihatsu - 8DKM-36	13.9	C
1094	KAREWOOD BRAVE IMO 9281516	6,315	2006	127 m	MAN - 9L21/31	13.9	C
1093	ANNE IMO 9433365	7,594	2010	116 m	MAK/Caterpillar - 6M32C	13.9	C
1096	LUCITA IMO 9338113	8,577	2005	108 m	MAN - 7S26MC	13.9	C
1095	KARINA C IMO 9558000	6,792	2010	106 m	MAK/Caterpillar - 6M25C	13.9	C
1097	MARK D IMO 9969443	3,644	2024	88 m	Mitsubishi S12R-MPTAW	13.9	C
1099	BOSFOR IMO 9369083	11,121	2008	146 m	MAK/Caterpillar - 9M32C	14.0	C
1098	WILSON SAGA IMO 8918461	6,489	1998	113 m	MAN - 12V28/32A	14.0	C
1100	BALTIC ANKA IMO 9986506	3,662	2024	88 m	Scania DI13	14.0	C

Page 22 of 48 — 2,380 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.