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)

#519 of 2,221 container ships

CO₂ intensity

5.3 g CO₂/dwt·nm

vs segment average (9.9)

-46% 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
501	CMA CGM BUTTERFLY IMO 9365790	9,661 TEU	2008	350 m	Hyundai - 12 RTA 96 C-B	5.2	B
504	MSC REEF IMO 9754965	17,664 TEU	2016	398 m	Doosan - 11G95ME-C9.2	5.2	B
506	MSC AMSTERDAM IMO 9606338	16,652 TEU	2015	399 m	STX - 12K98MC-C	5.2	B
503	MSC ELAINE IMO 9393321	8,562 TEU	2009	340 m	Hyundai - 14RT-flex96C	5.2	B
502	TIHAMA IMO 9736107	18,800 TEU	2016	400 m	Hyundai - 10S90ME-C10	5.2	B
505	EVER MUSE IMO 9935349	15,000 TEU	2024	366 m	WinGD 9X92	5.2	B
510	MSC MAYA IMO 9708679	18,400 TEU	2015	395 m	Hyundai - 8S80ME-C9	5.2	B
509	MSC JEWEL IMO 9842073	15,000 TEU	2019	366 m	Wärtsilä - 10X92	5.2	B
508	MAYA BAY IMO 9983401	2,954 TEU	2023	186 m	MAN-B&W 7S60ME-C10	5.2	B
507	HMM SKY IMO 9976599	85,516	2024	272 m	MAN-B&W 7G80ME-C10-GI	5.2	B
512	ALS CERES IMO 9938303	7,165 TEU	2021	255 m	Dalian Marine Diesel Co Ltd - China 6G80ME-C10	5.3	B
511	EVER GENIUS IMO 9786815	20,000 TEU	2018	400 m	MAN - 11G95ME-C9	5.3	B
513	CSCL PACIFIC OCEAN IMO 9695133	19,000 TEU	2014	400 m	Hyundai - 12S90ME-C9	5.3	B
514	COSCO SHIPPING ALPS IMO 9757864	13,636 TEU	2018	366 m	CSSC - 10S90ME-C10	5.3	B
515	EVER MEED IMO 9935258	15,000 TEU	2024	366 m	WinGD 9X92	5.3	B
516	MSC SOLA IMO 9401104	11,300 TEU	2008	364 m	MAN - 12K98ME	5.3	B
517	EBBA MAERSK IMO 9321524	11,000 TEU	2007	398 m	Doosan - DOOSAN-SULZER 14RT-FLEX96C	5.3	B
518	AL NEFUD IMO 9708813	18,691 TEU	2015	400 m	Hyundai - 10S90ME-C10	5.3	B
521	GREENFIELD IMO 9970026	7,200 TEU	2024	272 m	WinGD 6X82	5.3	B
520	CMA CGM ENDURANCE IMO 9951549	7,600 TEU	2024	268 m	MAN-B&W 7G80ME-C10-GI	5.3	B
519	MSC ARIANE IMO 9484443	13,050 TEU	2012	366 m	Doosan - 12K98MC-C	5.3	B
522	EVER GIVEN IMO 9811000	20,000 TEU	2015	400 m	Mitsui - 11G95ME-C9	5.3	B
524	HMM DRIVE IMO 9637246	13,154 TEU	2014	366 m	MAN - 10S90ME-C9	5.3	B
523	EVER GLOBE IMO 9786841	20,000 TEU	2019	400 m	MAN - 11G95ME-C9	5.3	B
525	MSC VENICE IMO 9647473	16,552 TEU	2016	399 m	STX - 12K98MC-C	5.3	B
526	KIEL EXPRESS IMO 9229855	7,179 TEU	2003	321 m	MAN - 12K98MC	5.4	B
528	EVER GENTLE IMO 9820922	20,150 TEU	2019	400 m	Mitsui - 11S90ME-C9	5.4	B
527	MSC FAITH IMO 9842085	15,000 TEU	2019	366 m	Wärtsilä - 10X92	5.4	B
529	YM WREATH IMO 9708473	14,198 TEU	2017	368 m	Hyundai - 11S90ME-C10	5.4	B
531	EXPRESS BRAZIL IMO 9443023	3,459 TEU	2010	222 m	Hyundai - 7RT-FLEX82C	5.4	B
530	APL TEMASEK IMO 9631955	13,892 TEU	2013	398 m	MAN - 11S90ME-C9	5.4	B
532	COSCO JAPAN IMO 9448748	8,500 TEU	2010	334 m	MAN - 11K98ME	5.4	B
533	MSC GENOVA IMO 9461386	14,000 TEU	2010	366 m	Doosan - 12K98MC-C	5.4	B
534	MSC DEILA IMO 9461415	14,000 TEU	2012	366 m	Doosan - 12K98MC-C	5.4	B
535	TAMPA TRIUMPH IMO 9737462	13,870 TEU	2017	366 m	STX - 11S90ME-C10.5	5.4	B
536	MAERSK SHIVLING IMO 9728253	9,162 TEU	2016	300 m	Wärtsilä - 9X82	5.4	B
540	COSCO INDONESIA IMO 9448786	8,500 TEU	2010	334 m	MAN - 11K98ME	5.4	B
539	EVER LAWFUL IMO 9595498	8,000 TEU	2012	335 m	Hyundai - 9K98ME7	5.4	B
538	EVER ALOT IMO 9893955	23,888 TEU	2022	400 m	CSSC-MES Diesel Co Ltd - China 11X92	5.4	B
537	MSC GAIA IMO 9401142	10,000 TEU	2010	366 m	MAN - 12K98MC-C	5.4	B
542	NINGBO EXPRESS IMO 9229843	7,179 TEU	2002	321 m	Hyundai - 12 K98MC	5.4	B
543	AL RIFFA IMO 9525912	13,296 TEU	2012	366 m	Doosan - 12K98MC-C	5.4	B
541	ELLY MAERSK IMO 9321536	11,000 TEU	2007	399 m	Doosan - DOOSAN-SULZER 14RT-FLEX96C	5.4	B
544	MAERSK CHAMBAL IMO 9525376	4,500 TEU	2012	249 m	HHI - 6S80ME-C9	5.5	B
546	CMA CGM TIGA IMO 9938418	5,500 TEU	2025	255 m	UnKnown 7X82-HPSCR	5.5	B
545	MSC DANIELA IMO 9399002	10,000 TEU	2008	366 m	MAN - 12K98MC-C	5.5	B
547	MSC KATIE IMO 9467457	12,400 TEU	2012	366 m	STX - 12K98MC-C	5.5	B
549	CAP SAN ARTEMISSIO IMO 9633939	9,600 TEU	2014	333 m	MAN - 7S90ME-C9	5.5	B
548	MSC BIANCA IMO 9770749	11,500 TEU	2019	328 m	Doosan - 9S90ME-C10	5.5	B
550	CAP SAN SOUNIO IMO 9633953	9,600 TEU	2014	333 m	MAN - 7S90ME-C9	5.5	B

Page 11 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.