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)

#907 of 2,380 general cargos

CO₂ intensity

12.8 g CO₂/dwt·nm

vs segment average (13.96)

-9% 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
899	STINNES ZEPHIR IMO 9473236	17,273	2011	145 m	MAN - 6S50MC	12.7	B
902	ACAPELLA IMO 9039092	3,690	1994	89 m	MWM - SBV8M628	12.7	B
904	SULTAN ATASOY IMO 9565467	6,634	2010	109 m	MAK/Caterpillar - 6M25	12.7	B
903	SOPTERIX IMO 9645839	7,540	2012	108 m	Shaanxi Diesel Engine Heavy Industry Co. Ltd. 8DKM-28	12.7	B
906	VIRGINIABORG IMO 9234290	9,861	2001	132 m	Wärtsilä - 6R38	12.8	B
905	MAGPIE IMO 9188922	10,335	2007	126 m	MAK/Caterpillar - 6 M 43 C	12.8	B
907	IJBORG IMO 9456721	13,212	2009	143 m	MAK/Caterpillar - 6M43	12.8	B
909	ARKLOW BRAVE IMO 9638800	8,632	2015	119 m	MAK/Caterpillar - 8M25C	12.8	B
908	ARKLOW ARTIST IMO 9851983	8,543	2021	120 m	MAK/Caterpillar - 6M25C	12.8	B
911	JUTLAND IMO 9142497	3,155	1997	88 m	MAK/Caterpillar - 8M20	12.8	B
910	ARKLOW BANK IMO 9638769	8,661	2014	119 m	MAK/Caterpillar - 8M25C	12.8	B
912	BBC VOLGA IMO 9436329	17,303	2009	143 m	Yichang - 6 S 46 MC-C	12.8	B
913	CLAUDE A. DESGAGNES IMO 9488059	12,671	2011	138 m	MAK/Caterpillar - 6M43	12.8	B
915	ARKLOW MILL IMO 9440265	14,998	2010	136 m	MAK/Caterpillar - 6 M 43 C	12.8	B
914	JSP TORNØ IMO 9968190	5,228	2023	90 m	MaK 6M25E	12.8	B
916	GWEN IMO 9402067	12,693	2008	139 m	MAK/Caterpillar - 6 M 43 C	12.8	B
919	TEONA IMO 9648843	7,000	2013	120 m	MAK/Caterpillar - 6M32C	12.8	B
918	FLAMURI IMO 9472713	10,221	2008	129 m	MAK/Caterpillar - 9M25	12.8	B
920	SIFTERI IMO 9452323	10,588	2008	132 m	—	12.8	B
917	VENTUS IMO 9368625	6,027	2006	100 m	GUANGZHOU DIESEL ENGINE CO.,LTD, CHINA 8320ZCD-6	12.8	B
921	ARKLOW BREEZE IMO 9638812	8,642	2015	119 m	MAK/Caterpillar - 8M25C	12.8	B
922	WILSON ECO II IMO 1052141	3,800	2025	89 m	—	12.8	B
923	VEGA CLARA IMO 1028566	3,777	2024	89 m	—	12.9	B
924	ANGELO IMO 9180877	6,999	1999	112 m	Wärtsilä - 8R32E	12.9	B
925	NURI SONAY IMO 9310202	14,888	2006	143 m	MAN - 6S35MC7	12.9	B
926	AL UDEID IMO 9294965	10,508	2004	146 m	MAK/Caterpillar - MAK 9M32C	12.9	B
928	MANISA SOFIA IMO 9428396	12,500	2011	137 m	Wärtsilä - 6L46B	12.9	B
927	IRENA IMO 9306380	8,153	2005	108 m	STX - 7 S 26 MC-MK6	12.9	B
929	TOPTERIX IMO 9630016	8,232	2011	116 m	Shaanxi Diesel Engine Heavy Industry Co. Ltd. 8DKM-28	12.9	B
930	VANCOUVERBORG IMO 9213741	9,829	2001	132 m	Wärtsilä - 6R38	12.9	B
931	LIDAN IMO 9924730	5,080	2024	89 m	Wärtsilä - 8L20	12.9	B
933	BBC RHINE IMO 9539377	17,809	2013	161 m	Doosan - 6S50MC-C	12.9	B
932	KELLY C IMO 9558024	6,794	2010	106 m	MAK/Caterpillar - 6M25C	12.9	B
935	REGINA IMO 9370111	13,425	2008	138 m	MAN - 7 S 35 MC	12.9	B
934	VICTORIABORG IMO 9234276	9,861	2001	132 m	Wärtsilä - 6R38	12.9	B
936	BBC HUDSON IMO 9435868	17,327	2009	143 m	Yichang - 6 S 46 MC-C	12.9	B
938	BIG RISE IMO 9509267	8,441	2009	118 m	SHAANXI DIESEL HEAVY INDUSTRY CO., LTD. 8DKM-28	12.9	B
937	EYUP IMO 9306392	8,709	2005	108 m	STX - 7 S 26 MC-MK6	12.9	B
940	FWN SKY IMO 9721633	10,521	2015	122 m	MAK/Caterpillar - 6M32C	12.9	B
939	LONGEDEN IMO 9988126	8,467	2025	130 m	Yanmar 6EY22ALW	12.9	B
941	AUGUSTA LUNA IMO 9480124	17,370	2011	144 m	3. MAJ - 6 RTA 48 T-B	13.0	B
943	UAL TEXAS IMO 9542350	8,600	2013	127 m	MAK/Caterpillar - 6M32	13.0	B
942	KETLIN IMO 9342152	5,950	2006	107 m	MAK/Caterpillar - 6M25	13.0	B
944	BBC SEBASTOPOL IMO 9812004	12,325	2022	147 m	MAN - 6S40ME-B9	13.0	B
946	BBC MINNESOTA IMO 9260378	12,840	2004	138 m	MAK/Caterpillar - 6M43	13.0	B
945	SAIMAAGRACHT IMO 9288069	23,661	2005	185 m	Wärtsilä - 6L64	13.0	B
947	HALISDEMIR IMO 9517331	7,000	2008	120 m	Daihatsu - 8DKM-28	13.0	B
950	BIRGIT IMO 9433341	7,560	2008	116 m	MAK/Caterpillar - 6M32C	13.0	B
949	KEMET STAR IMO 9154282	17,064	1999	149 m	5S46MC-C	13.0	B
948	COE LUISA IMO 9435026	12,669	2008	138 m	MAK/Caterpillar - 6 M 43 C	13.0	B

Page 19 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.