Most Emission-Efficient Container Ships

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)

#700 of 2,221 container ships

CO₂ intensity

6.3 g CO₂/dwt·nm

vs segment average (9.9)

-36% 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 (TEU)

All sizes < 3,000 TEU 3k – 8k TEU 8k – 14k TEU > 14,000 TEU

Year

2025 2024

2,267

vessels ranked

2.88

greenest (g CO₂/t·nm)

8.38

segment median

#	Vessel	Size (TEU)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
651	CARTAGENA EXPRESS IMO 9777618	10,818 TEU	2017	333 m	MAN - 7S90ME-C9	6.1	B
652	ISTANBUL EXPRESS IMO 9723277	9,040 TEU	2016	300 m	Wärtsilä - 8X92	6.1	B
654	TRAIGUEN IMO 9627904	8,704 TEU	2013	300 m	MAN - 9S90ME-C8	6.1	B
656	MSC JAMBOREE IX IMO 9450363	8,400 TEU	2010	333 m	MAN - 10K98ME-C	6.1	B
653	MAERSK FELIXSTOWE IMO 9969041	5,920 TEU	2023	255 m	MAN-B&W 6G80ME-C10	6.1	B
655	ONE RESOLUTION IMO 9952763	7,000 TEU	2024	272 m	7G80ME-C10-HPSCR	6.1	B
657	OOCL FRANCE IMO 9622617	13,200 TEU	2011	366 m	Hyundai - 12S90ME-C9	6.1	B
659	MSC MADELEINE IMO 9305702	9,100 TEU	2006	348 m	MAN - 12K98ME	6.1	B
658	MSC CLEA IMO 9720524	9,411 TEU	2016	300 m	Hyundai - 9S90ME-C10	6.1	B
660	CISNES IMO 9687576	9,326 TEU	2015	300 m	MAN - 8S90ME-C10	6.1	B
661	MSC PINA IMO 9339272	9,200 TEU	2007	337 m	Doosan - 12K98MC-C	6.1	B
663	ONE RESPONSIBILITY IMO 9952775	7,000 TEU	2024	272 m	7G80ME-C10-HPSCR	6.2	B
662	MAERSK DANUBE IMO 9694579	5,380 TEU	2014	255 m	MAN - 6G80ME-C9	6.2	B
664	MSC DAKAR X IMO 9605231	9,400 TEU	2013	300 m	Hyundai - 9S90ME-C9	6.2	B
666	COYHAIQUE IMO 9687588	9,326 TEU	2015	300 m	MAN - 8S90ME-C10	6.2	B
665	MSC DANIT IMO 9404649	13,200 TEU	2009	366 m	MAN - 12K98MC-C	6.2	B
667	MSC CRISTINA IMO 9465241	13,100 TEU	2011	366 m	MAN - 12K98ME7	6.2	B
668	CSCL MERCURY IMO 9467275	13,300 TEU	2011	366 m	MAN - 12K98ME-C	6.2	B
669	CMA CGM AMAZON IMO 9706308	9,288 TEU	2015	300 m	Wärtsilä - 9X82	6.2	B
670	LUDWIGSHAFEN EXPRESS IMO 9613018	13,000 TEU	2014	367 m	Hyundai - 11K98ME	6.2	B
671	MSC RAPALLO IMO 9484455	13,050 TEU	2011	366 m	Doosan - 12K98MC-C	6.2	B
673	CSCL MARS IMO 9467287	13,300 TEU	2011	366 m	MAN - 12K98ME-C	6.2	B
672	MSC MARIA SAVERIA IMO 9467421	12,400 TEU	2011	366 m	MAN - 12K98MC-C	6.2	B
675	EVER LIFTING IMO 9629122	8,000 TEU	2015	335 m	MAN - 9K98ME7	6.2	B
674	BREMERHAVEN EXPRESS IMO 9723253	9,040 TEU	2015	300 m	Wärtsilä - 8X92	6.2	B
676	YOKOHAMA EXPRESS IMO 9630418	10,100 TEU	2015	337 m	MAN - 10S90ME-C9	6.2	B
677	MISSOURI EXPRESS IMO 9349552	6,921 TEU	2008	306 m	Wärtsilä - 11RT-flex96C	6.2	B
678	ONE HONOLULU IMO 9588079	8,930 TEU	2012	335 m	Mitsui - 9K98ME-MKVI	6.2	B
679	MAERSK TUKANG IMO 9334686	8,100 TEU	2008	322 m	Wärtsilä - 12RT-flex96C	6.2	B
680	MSC RENEE XIII IMO 9465306	13,100 TEU	2012	366 m	MAN - 12K98ME7	6.2	B
683	MSC CAPELLA IMO 9465289	13,100 TEU	2012	366 m	MAN - 12K98ME7	6.2	B
682	CSCL SATURN IMO 9467299	13,300 TEU	2011	366 m	MAN - 12K98ME-C	6.2	B
681	MSC NATASHA XIII IMO 9463035	10,000 TEU	2011	366 m	MAN - 12K98MC	6.2	B
686	CMA CGM DALILA IMO 9450624	8,500 TEU	2011	334 m	MAN - 12K98ME-C	6.3	B
685	MAERSK GUATEMALA IMO 9713375	10,100 TEU	2015	337 m	MAN - 10S90ME-C9	6.3	B
687	ULSAN EXPRESS IMO 9613020	13,000 TEU	2014	367 m	MAN - 11K98ME	6.3	B
684	SCI DELHI IMO 9699127	9,034 TEU	2014	300 m	Wärtsilä - 9X82	6.3	B
688	CMA CGM COLUMBA IMO 9410789	11,400 TEU	2011	363 m	MAN - 12K98ME-C	6.3	B
689	MSC CAROLE IMO 9785445	12,200 TEU	2021	328 m	Doosan - 8G95ME-C9	6.3	B
690	MAERSK SEMBAWANG IMO 9315226	5,648 TEU	2007	318 m	Wärtsilä - 11RT-flex96C	6.3	B
692	COSCO ENGLAND IMO 9516428	13,360 TEU	2008	366 m	MAN - 12K98ME7	6.3	B
694	MSC KANOKO IMO 9842102	15,000 TEU	2019	366 m	Wärtsilä - 10X92	6.3	B
693	MSC ARICA IMO 9619452	8,762 TEU	2012	299 m	Hyundai - 9S90ME-C8	6.3	B
691	SEASPAN ADONIS IMO 9468293	9,592 TEU	2010	332 m	Wärtsilä - 11RT-flex96C	6.3	B
695	APL VANCOUVER IMO 9597472	9,200 TEU	2013	328 m	Doosan - 10S90ME-C MK9.2 TIER 2 (58,100 KW AT 84 RPM / 51,070 KW AT 84 RPM)	6.3	B
696	ALTAMIRA EXPRESS IMO 9407146	5,041 TEU	2009	294 m	Wärtsilä - 8RTA96C	6.3	B
699	MSC EMANUELA IMO 9399052	10,000 TEU	2010	366 m	MAN - 12K98MC-C	6.3	B
698	CSCL JUPITER IMO 9467263	13,300 TEU	2011	366 m	Doosan - 12K98ME-C	6.3	B
697	SANTOS EXPRESS IMO 9777632	10,818 TEU	2017	333 m	MAN - 7S90ME-C9	6.3	B
700	RDO CONCORD IMO 9401283	6,500 TEU	2009	304 m	MAN - 10K98MC	6.3	B

Page 14 of 45 — 2,221 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.