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)

#803 of 2,380 general cargos

CO₂ intensity

12.1 g CO₂/dwt·nm

vs segment average (13.96)

-13% 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
801	ABILITY IMO 9145645	17,440	1998	141 m	MAN - 7 S 35 MC	12.1	B
802	WHITE STAR IMO 9381938	9,223	2007	130 m	SHAANXI DIESEL ENGINE HEAVY INDUSTRY CO., LTD. 6 PC2 - 5L	12.1	B
803	ARKLOW ABBEY IMO 9851933	8,543	2019	120 m	MAK/Caterpillar - 6M25C	12.1	B
804	ARKLOW ARCHER IMO 9851969	8,543	2020	120 m	MAK/Caterpillar - 6M25C	12.1	B
805	SELVAAGSUND IMO 9956862	8,534	2023	120 m	MaK 8M25E	12.1	B
806	ESL EUROPA IMO 9333553	17,300	2007	143 m	Wärtsilä - 8 L 46 B	12.1	B
807	ZEA SERVANT IMO 9741126	12,302	2018	147 m	STX - 5G45ME-C9	12.1	B
808	ECO TREASURE IMO 9938690	9,072	2024	133 m	MAK/Caterpillar - 6M32C	12.1	B
810	PINDO IMO 9504138	11,023	2011	132 m	MAK/Caterpillar - 8M32	12.1	B
809	EKMEN TRANS IMO 9204348	6,687	1999	106 m	Mitsui - 5L35MC	12.1	B
811	SPIKEN IMO 9988504	5,080	2024	89 m	Wartsila 8L20	12.2	B
812	DENIZ AKAY IMO 9349447	10,501	2010	107 m	MAK/Caterpillar - 8M32C	12.2	B
813	ESL AMERICA IMO 9347035	17,349	2006	143 m	Yichang - 6 S 46 MC-C	12.2	B
814	ARKLOW BEACON IMO 9638795	8,662	2014	119 m	MAK/Caterpillar - 8M25C	12.2	B
815	KLARA IMO 9115896	3,270	1995	90 m	MAK/Caterpillar - 8M20	12.2	B
816	MARIO C IMO 9364526	13,422	2019	130 m	Caterpillar Inc - USA MAK (Krupp MAK)	12.2	B
817	BOHA WITTENBERGEN IMO 9014676	3,600	1992	88 m	Deutz - SBV8M628	12.2	B
818	ARKLOW MEADOW IMO 9440277	14,998	2010	136 m	MAK/Caterpillar - 6 M 43 C	12.2	B
819	TRIO CAN BERAT IMO 8922254	4,245	1992	88 m	MAK/Caterpillar - 3606-DITA	12.2	B
821	BBC TOKYO IMO 9971434	13,418	2025	150 m	MAN-B&W 6G45ME-C9	12.2	B
820	EVA IMO 9435105	12,764	2008	138 m	MAK/Caterpillar - M43C	12.2	B
822	OCEAN FORCE IMO 8821814	12,150	1990	130 m	Wärtsilä - 12V32E	12.2	B
824	ARNEBORG IMO 9333539	17,356	2006	143 m	Wärtsilä - 8 L 46 B	12.3	B
823	AYADA IMO 9268863	7,020	2005	111 m	Wärtsilä - 6L26	12.3	B
825	EMS LIBERTY IMO 1022299	4,700	2024	94 m	Hanshin LH28LRG	12.3	B
826	SABAHAT SONAY IMO 9370525	14,888	2007	143 m	MAN - 6L35MC	12.3	B
827	TOI CHALLENGER IMO 9151515	21,146	1998	164 m	Ssangyong - 7 S 35 MC	12.3	B
828	YM AMAZON IMO 9622758	11,500	2013	131 m	MAN - 6L32/44CR	12.3	B
829	KAIE IMO 9504102	11,198	2010	132 m	MAK/Caterpillar - 8M32	12.3	B
830	BOLTEN PANORAMA IMO 9495583	26,449	2012	157 m	MAKITA - 6S42MC	12.3	B
831	TOYA IMO 9368106	3,385	2005	81 m	NINGBO C.S.I. POWER && MACHINERY GROUP CO., LTD. G6300ZC18B	12.3	B
832	GOLDEN LION IMO 9363974	6,315	2006	127 m	MAN - 9L21/31	12.3	B
835	KEITH IMO 9736195	12,234	2019	147 m	Jiangsu Antai Power Co. Ltd. 5G45ME-C9	12.3	B
834	KSL AMARA IMO 9644744	13,077	2013	125 m	MAN - 6L35MC	12.3	B
833	ALASKABORG IMO 9466374	17,294	2012	143 m	Wärtsilä - 8 L 46 B	12.3	B
836	AYSTAR IMO 9257204	3,276	2001	81 m	Ningbo Zhonghua Dongli Power Machinery Co. G6300ZC6B	12.3	B
837	SUOMIGRACHT IMO 9288057	23,661	2004	185 m	Wärtsilä - 6L64	12.3	B
840	DA ZHI IMO 9608439	29,495	2014	180 m	MAN - 6S50ME-C8	12.3	B
839	EBROBORG IMO 9463451	11,197	2010	138 m	Wärtsilä - 9L32	12.3	B
838	VESTANHAV IMO 9504152	10,089	2012	123 m	Wärtsilä - 8M32C	12.3	B
841	TQ MERSIN IMO 1052270	12,060	2008	128 m	Chinese Std. Type G8300ZC	12.4	B
842	ARKLOW ARROW IMO 9851971	8,543	2021	120 m	MAK/Caterpillar - 6M25C	12.4	B
843	ANDESBORG IMO 9466324	17,294	2011	143 m	Wärtsilä - 8 L 46 B	12.4	B
845	LADY LEYLA IMO 9106986	11,366	1995	134 m	MAN B&W Diesel A/S - Denmark 6L35MC	12.4	B
844	ADALADY IMO 9664160	13,559	2013	120 m	STX - 6L35MC	12.4	B
846	ECO TITAN IMO 9933793	9,000	2023	133 m	MAK/Caterpillar - 6M32C	12.4	B
848	AMURBORG IMO 9466336	17,294	2011	143 m	Wärtsilä - 8 L 46 B	12.4	B
847	FWN SUN IMO 9721669	10,557	2016	122 m	MAK/Caterpillar - 6M32C	12.4	B
850	CELIK 1 IMO 9430791	7,702	2007	121 m	Shaanxi Diesel Engine Heavy Industry Co. Ltd. 6PC2-6	12.4	B
849	ANOUK IMO 9196266	3,171	2000	90 m	MAK MOTOREN GMBH &AMP; CO. KG 8M20	12.4	B

Page 17 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.