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)

#587 of 2,221 container ships

CO₂ intensity

5.7 g CO₂/dwt·nm

vs segment average (9.9)

-43% 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
550	CONTI CRYSTAL IMO 9293820	8,084 TEU	2006	334 m	Doosan - 12 RTA 96 C-B	5.5	B
553	OOCL KOREA IMO 9627992	13,200 TEU	2014	366 m	HHI - 12S90ME-C9.2	5.5	B
552	NICARAGUA EXPRESS IMO 9635676	6,900 TEU	2013	270 m	Hyundai - 8S80ME-C9.2	5.5	B
554	YM WINDOW IMO 9708435	14,198 TEU	2016	368 m	MAN - 11S90ME-C10	5.5	B
557	MSC BEATRICE IMO 9399014	10,000 TEU	2009	366 m	MAN - 12K98MC-C	5.5	B
560	MSC NEW YORK IMO 9606314	16,652 TEU	2014	399 m	STX - 12K98MC-C	5.5	B
556	CMA CGM VASCO DE GAMA IMO 9706889	17,859 TEU	2015	399 m	CSSC - 11S90ME-C9	5.5	B
562	HMM LEAF IMO 1015959	99,725	2025	282 m	MAN-B&W 7G80ME-C10-LGIM	5.5	B
561	CAP SAN MALEAS IMO 9633941	9,600 TEU	2014	333 m	MAN - 7S90ME-C9	5.5	B
555	CMA CGM ANDROMEDA IMO 9410727	11,356 TEU	2009	363 m	Hyundai - 12K98ME-C	5.5	B
559	AL NASRIYAH IMO 9708849	15,000 TEU	2015	369 m	MAN - 9S90ME-C10	5.5	B
558	CMA CGM ZHENG HE IMO 9706906	17,859 TEU	2015	399 m	CSSC - 11S90ME-C9	5.5	B
563	SEASPAN GANGES IMO 9630365	10,100 TEU	2014	336 m	MAN - 10S90ME-C9	5.5	B
564	CMA CGM AQUILA IMO 9410741	11,388 TEU	2009	363 m	MAN - 12K98ME-C	5.5	B
565	MOL CREATION IMO 9321237	8,110 TEU	2007	316 m	Wärtsilä - 11RT-flex96C	5.5	B
568	EVELYN MAERSK IMO 9321512	11,000 TEU	2007	399 m	Doosan - DOOSAN-SULZER 14RT-FLEX96C	5.5	B
567	YM WELCOME IMO 9708459	14,198 TEU	2016	368 m	Hyundai - 11S90ME-C10	5.5	B
566	MAERSK SALTORO IMO 9725706	9,962 TEU	2015	300 m	MAN - 9S90ME-C9	5.5	B
571	YM TOGETHER IMO 9789984	14,000 TEU	2021	334 m	Mitsui - 11S90ME-C10	5.5	B
570	COSCO FORTUNE IMO 9472127	13,092 TEU	2012	366 m	Hyundai - 12 K98MC	5.5	B
569	MSC BENEDETTA XIII IMO 9465253	13,100 TEU	2011	366 m	Hyundai - HHI MAN B&W; 12K98ME7	5.5	B
572	PARIS EXPRESS IMO 9447902	12,600 TEU	2011	366 m	MAN - 12K98ME-C	5.6	B
573	COSCO SHIPPING ANDES IMO 9757888	13,636 TEU	2018	366 m	CSSC - 10S90ME-C10	5.6	B
574	HMM OCEAN IMO 9976587	85,516	2025	272 m	MAN-B&W 7G80ME-C10-GI	5.6	B
575	CMA CGM NEVADA IMO 9471408	12,600 TEU	2011	366 m	MAN - 12K98ME-C	5.6	B
577	EXPRESS FRANCE IMO 9443035	3,459 TEU	2010	223 m	Hyundai - 7RT-FLEX82C	5.6	B
576	MSC ALEXANDRA IMO 9461374	14,000 TEU	2010	366 m	Doosan - 12K98MC-C	5.6	B
578	MAERSK SAN JUAN IMO 9717204	10,600 TEU	2015	331 m	MAN - 7S90ME-C10	5.6	B
579	APL BARCELONA IMO 9462043	10,800 TEU	2012	347 m	Doosan - 12K98ME-C	5.6	B
580	CMA CGM APOLLON IMO 9882516	15,000 TEU	2022	366 m	Hyundai Heavy Industries Co Ltd - South Korea 10X92-LPSCR	5.7	B
582	MSC MELATILDE IMO 9404675	13,200 TEU	2010	366 m	Doosan - 12K98MC-C	5.7	B
584	LEVERKUSEN EXPRESS IMO 9613006	13,000 TEU	2014	366 m	Hyundai - 11K98ME	5.7	B
581	JEBEL ALI IMO 9525936	13,296 TEU	2012	366 m	Doosan - 12K98MC-C	5.7	B
583	CMA CGM PEGASUS IMO 9399210	11,400 TEU	2010	363 m	MAN - 12K98ME-C	5.7	B
586	ALULA EXPRESS IMO 9525883	13,296 TEU	2012	366 m	Doosan - 12K98MC-C	5.7	B
585	MSC JUSTICE VIII IMO 9450351	8,400 TEU	2010	333 m	MAN - 10K98ME-C	5.7	B
588	MSC ALTAIR IMO 9465277	13,100 TEU	2012	366 m	MAN - 12K98ME7	5.7	B
587	ESTELLE MAERSK IMO 9321495	11,000 TEU	2006	398 m	Doosan - DOOSAN-SULZER 14RT-FLEX96C	5.7	B
589	ONE MANCHESTER IMO 9706748	13,870 TEU	2015	366 m	MAN - 11S90ME-C9	5.7	B
591	COLOMBIA EXPRESS IMO 9635664	6,900 TEU	2013	270 m	Hyundai - 8S80ME-C9.2	5.7	B
590	MSC LUCY IMO 9289104	8,034 TEU	2005	325 m	Sulzer - 12RTA96C	5.7	B
592	AQUAMARINE IMO 9968097	7,000 TEU	2025	272 m	Hudong Heavy Machinery Co Ltd - China 7G80ME-C10-GI-ERGTC	5.7	B
593	CSCL STAR IMO 9466867	13,300 TEU	2011	366 m	Doosan - 12K98MC-C7	5.7	B
595	APL SALALAH IMO 9462029	10,800 TEU	2012	347 m	MAN - 12K98ME-C	5.8	B
594	MSC ROSA M IMO 9461398	14,000 TEU	2010	366 m	MAN - 12K98MC-C	5.8	B
596	MSC ALIYA IMO 9842097	15,000 TEU	2019	366 m	Wärtsilä - 10X92	5.8	B
597	MSC INES IMO 9305714	9,100 TEU	2006	348 m	MAN - 12K98ME	5.8	B
599	MAERSK TANJONG IMO 9332511	8,086 TEU	2007	332 m	Wärtsilä - 12RT-flex96C	5.8	B
598	MSC LAUREN IMO 9467407	12,400 TEU	2011	366 m	MAN - 12K98MC-C	5.8	B
600	CMA CGM BENJAMIN FRANKLIN IMO 9706891	17,859 TEU	2015	399 m	CSSC - 11S90ME-C9	5.8	B

Page 12 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.