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)

#593 of 2,380 general cargos

CO₂ intensity

9.8 g CO₂/dwt·nm

vs segment average (13.96)

-30% 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
552	CHIPOLBROK GALAXY IMO 9432141	30,330	2010	200 m	Wärtsilä - 7RT-flex60C	9.2	B
551	ATLANTA IMO 9513373	12,223	2009	140 m	YANMAR - 8N330-EN	9.2	B
553	LEOPOLD STAFF IMO 9272228	30,469	2004	190 m	Hyundai - 7RT-flex60C	9.2	B
554	BEATRIX IMO 9419280	14,603	2009	155 m	Wärtsilä - 9L32C	9.2	B
555	XIA MEN ZE SHUN IMO 9695107	27,263	2014	180 m	DALIAN MARINE - 6S50MC-C8	9.2	B
556	LAKE ST. CLAIR IMO 9315549	27,740	2005	185 m	Hudong Heavy Machinery - 6S46MC-C	9.3	B
557	MATTEO BR IMO 9556844	25,000	2010	157 m	STX - 7S35MC	9.3	B
558	MAXIMUS-1 IMO 9344734	10,632	2004	128 m	Daihatsu - 8DKM-28	9.3	B
559	VERTOM CYTA IMO 9938731	7,281	2023	119 m	Volvo Penta D13MG	9.3	B
562	ADAVEGA IMO 9539339	12,427	2010	115 m	MAN - 6L35MC	9.3	B
561	EGBERT WAGENBORG IMO 9802695	14,367	2017	150 m	MAK/Caterpillar - 6M32C	9.3	B
560	AAL PUSAN IMO 9498389	32,279	2012	194 m	Wärtsilä - 7RT-flex50-B	9.3	B
563	FISHER IMO 9177791	12,974	1999	128 m	MAKITA - 6S35MC	9.3	B
564	MARIA FRANCISCA IMO 9235361	30,320	2004	193 m	DALIAN MARINE - 7 S 60 MC-C	9.3	B
565	ARKLOW WIND IMO 9818943	16,861	2019	150 m	MAK/Caterpillar - 8M32C	9.4	B
566	VERTOM ANETTE IMO 9972763	7,292	2024	119 m	Volvo Penta D13MG	9.4	B
568	ARKLOW WOOD IMO 9818967	16,861	2020	150 m	MAK/Caterpillar - 8M32C	9.4	B
567	SIENNA IMO 9353022	8,163	2005	120 m	Daihatsu - 8DKM-28	9.4	B
569	ORUBA IMO 9430624	10,611	2007	132 m	SHAANXI HEAVY INDUSTRIES, SHAANXI CHINA 8 PC 2-5 L (I.M.P.)	9.4	B
570	ADAROSE IMO 9392107	12,497	2009	115 m	Mitsubishi - 7UEC37LA	9.4	B
571	MARIA JOSE IMO 9593672	24,964	2011	161 m	MAN - 6S50MC-C	9.5	B
572	MISJE ROSE IMO 9967548	5,310	2024	90 m	Wartsila 8L20	9.5	B
573	ULTRA KUROSHIO IMO 1057543	13,796	2025	120 m	Chinese Std. Type 6N350ZLC/S	9.5	B
574	VERTOM LISA IMO 9972775	7,280	2024	119 m	Volvo Penta D13MG	9.5	B
575	MUHARREM DADAYLI IMO 9558581	13,449	2010	149 m	MAK/Caterpillar - 8M32C	9.5	B
577	BLUE CAPRAMAR IMO 9641845	7,800	2012	120 m	Guangzhou 8320ZC	9.5	B
576	PEACE IMO 9553983	16,817	2012	152 m	Hyundai - 5S35MC	9.5	B
578	LAKE ONTARIO IMO 9283538	27,783	2004	185 m	Hudong Heavy Machinery - 6S46MC-C	9.6	B
580	ZI JING SONG IMO 9608910	27,402	2012	180 m	MAN - 6S50ME-C8	9.6	B
579	SIRUS SKY IMO 9648738	7,800	2012	120 m	GUANGZHOU DIESEL ENGINE FACTORY CO., LTD. 8320ZC	9.6	B
581	WO LONG SONG IMO 9416783	27,354	2010	180 m	Mitsubishi - 6UEC50LSII	9.6	B
582	SANDSTAD IMO 1028956	8,583	2025	120 m	MAN 8L27/38	9.6	B
583	JADE I IMO 9162411	25,012	1998	160 m	Mitsui - 6S42MC	9.6	B
584	WESER STAHL IMO 9186687	47,257	1999	192 m	Hitachi - 9L32/40	9.6	B
585	LADY AYSE IMO 9227871	16,239	2001	137 m	Akasaka - MITSUBISHI 6 UEC 37 LSII	9.7	B
586	FINNBORG IMO 9419321	14,603	2011	143 m	Wärtsilä - 9L32C	9.7	B
587	MOHAMAD Y IMO 8107000	11,990	1982	138 m	Stork Werkspoor 9TM410	9.7	B
588	PATAGONMAN IMO 9521851	18,858	2012	150 m	STX - STX-MAN 5S50MC-C	9.7	B
589	ICDAS-5 IMO 9829916	15,621	2019	148 m	Hyundai - 6H-32/40	9.7	B
590	MIKAWA IMO 9354208	14,078	2006	128 m	MAKITA - 6S35MC	9.8	B
592	LADY ESMA IMO 9402110	31,612	2009	172 m	Mitsubishi - 6UEC52LA	9.8	B
591	ARKLOW WILLOW IMO 9818955	16,861	2019	150 m	MAK/Caterpillar - 8M32C	9.8	B
593	TRINITYBORG IMO 9546485	21,277	2013	172 m	Wärtsilä - 6L46F	9.8	B
594	ARAGONBORG IMO 9466312	17,294	2010	143 m	Wärtsilä - 8 L 46 B	9.8	B
597	BRAVE WARRIOR IMO 7208728	6,336	1972	101 m	MAK/Caterpillar - 6MU551AK	9.8	B
596	VERTOM TOMMA IMO 9938743	7,281	2023	119 m	Volvo Penta D13MG	9.8	B
595	TIMBERLAND IMO 9204790	20,406	2000	153 m	Mitsubishi - 6UEC50LS	9.8	B
598	LAKE ERIE IMO 9283540	27,781	2004	185 m	Hudong Heavy Machinery - 6S46MC-C	9.8	B
599	KING JOY IMO 9537472	16,808	2009	148 m	SHAANXI DIESEL ENGINE HEAVY INDUSTRY CO., LTD. 9 L 32/40	9.8	B
600	ADAPEARL IMO 9539432	12,440	2011	115 m	MAN - 6L35MC	9.8	B

Page 12 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.