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 2024. Lower is greener. Pick a segment and size class to see the greenest vessels first.

Segment rank (2024)

#867 of 2,098 container ships

CO₂ intensity

7.6 g CO₂/dwt·nm

vs segment average (10.39)

-27% 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

2,141

vessels ranked

2.25

greenest (g CO₂/t·nm)

8.58

segment median

#	Vessel	Size (TEU)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
851	W KLAIPEDA IMO 9211482	6,802 TEU	2001	300 m	HHI - 12RTA96C	7.5	C
854	CMA CGM LISA MARIE IMO 9729099	9,400 TEU	2017	300 m	CSSC - 9S90ME-C9	7.5	C
853	MSC SARISKA V IMO 8715857	3,937 TEU	1990	294 m	Mitsui - 12K90MC	7.5	C
852	MAERSK GENOA IMO 9739680	10,100 TEU	2016	337 m	CSSC - 10S90ME-C9	7.5	C
855	CMA CGM NIAGARA IMO 9722675	9,894 TEU	2015	300 m	MAN - 8S90ME-C9	7.5	C
856	MSC MANDY III IMO 8918966	2,668 TEU	1993	237 m	BREMER VULKAN AG SCHIFFBAU UND MASCHINENFABRIK 7 L 80 MC	7.5	C
857	MAERSK MONTE LINZOR IMO 9283186	4,000 TEU	2004	272 m	Wärtsilä - 8RTA96C	7.5	C
859	MSC SHANGHAI V IMO 9231822	4,800 TEU	2002	294 m	Hyundai - HYUNDAI - MAN B&W 9K90MC-C	7.6	C
858	MSC NIOVI VIII IMO 9290488	7,455 TEU	2005	300 m	MAN - 12K98MC-C	7.6	C
860	LEONIDAS Z IMO 9963528	2,782 TEU	2024	186 m	Hyundai - 6S60ME-C10	7.6	C
861	HERMANN SCHULTE IMO 9535187	5,605 TEU	2012	275 m	MAN - 8K98ME	7.6	C
862	BELITA IMO 9318060	8,204 TEU	2006	334 m	MAN - 12K98MC	7.6	C
863	MSC POH LIN IMO 9279977	4,862 TEU	2004	294 m	Hyundai - 9 K 90 MC-C	7.6	C
866	MSC CHIARA X IMO 9198587	6,600 TEU	2000	347 m	Hitachi - 12K90MC	7.6	C
865	SEASPAN EMISSARY IMO 9407158	5,041 TEU	2009	294 m	Wärtsilä - 8RTA96C	7.6	C
864	ROB IMO 9236652	2,442 TEU	2001	221 m	MAN - 7L70MC	7.6	C
868	BARCELONA EXPRESS IMO 9626053	3,800 TEU	2014	228 m	Wärtsilä - 7RT-flex82C	7.6	C
867	OCEAN CASTLE IMO 9315537	27,779	2005	185 m	Hudong Heavy Machinery - 6S46MC-C	7.6	C
870	SAN FRANCISCO IMO 9225615	6,750 TEU	2001	300 m	Hyundai - 10 K 98 MC-C	7.6	C
872	EVER STRONG IMO 9300441	7,024 TEU	2007	300 m	Mitsubishi - 10RTA96C	7.6	C
869	MSC LORETTA IMO 9230490	6,730 TEU	2002	304 m	Hyundai - 10 K 98 MC-C	7.6	C
871	NYK DEMETER IMO 9337664	4,888 TEU	2007	294 m	MAN - 9K98ME-C	7.6	C
873	TIANJIN IMO 9398462	9,262 TEU	2010	349 m	MAN - 12K98MC	7.6	C
875	MERVE A IMO 9389681	4,250 TEU	2008	260 m	MAN - 8K90MC-C	7.6	C
874	KOI IMO 9461489	8,600 TEU	2011	335 m	Wärtsilä - 12RT-flex96C	7.6	C
876	OOCL ST. LAWRENCE IMO 9290414	5,042 TEU	2005	295 m	Sulzer - 8RTA96C	7.6	C
877	MAERSK KENSINGTON IMO 9333010	6,200 TEU	2007	299 m	Doosan - 10RT-flex96C	7.6	C
878	MAERSK GUATEMALA IMO 9713375	10,100 TEU	2015	337 m	MAN - 10S90ME-C9	7.6	C
880	MEDITERRANEAN EXPRESS IMO 9622019	4,800 TEU	2014	250 m	MAN - 6S80ME-C9	7.6	C
879	NYK VIRGO IMO 9312810	9,012 TEU	2007	338 m	MAN - 12K98ME	7.6	C
882	KYOTO EXPRESS IMO 9295256	8,235 TEU	2005	335 m	Hyundai - 12 K 98 ME	7.6	C
881	JOLLY ORO IMO 9450313	4,600 TEU	2009	264 m	MAN - 8K90MC-C	7.6	C
883	VENTA MAERSK IMO 9775763	3,600 TEU	2018	200 m	STX - 6G70ME-C8	7.6	C
884	MSC ANS IMO 9282261	4,900 TEU	2004	294 m	HSD ENGINE CO., LTD. 9 K 90 MC-C	7.7	C
885	MSC JORDAN III IMO 8918980	2,668 TEU	1993	237 m	BREMER VULKAN AG SCHIFFBAU UND MASCHINENFABRIK 7 L 80 MC	7.7	C
886	MSC RANIA IMO 9309447	8,400 TEU	2005	332 m	Doosan - 12K98MC-C	7.7	C
891	FRANKFURT EXPRESS IMO 9450442	8,600 TEU	2010	335 m	MAN - 10K98ME	7.7	C
890	MSC TIANJIN IMO 9285471	8,063 TEU	2005	323 m	MAN - 12K98MC-C	7.7	C
889	CMA CGM ALCAZAR IMO 9335197	5,089 TEU	2007	294 m	MAN - 9K90MC-C	7.7	C
888	MOMBASA EXPRESS IMO 9495777	4,600 TEU	2013	260 m	MAN - 8K80ME-C	7.7	C
887	MAERSK NAKURU IMO 9356103	2,478 TEU	2005	210 m	Doosan - 7L70ME-C	7.7	C
893	MSC SORAYA IMO 9372494	5,770 TEU	2008	277 m	MAN - 9K98MC	7.7	C
892	MSC KERRY VII IMO 9221815	6,446 TEU	2001	300 m	Hyundai - 12 K98MC-C	7.7	C
897	MSC KRYSTAL IMO 9372470	5,800 TEU	2008	277 m	MAN - 12 K 90 MC	7.7	C
896	WIELAND IMO 9654464	4,771 TEU	2014	255 m	MAN - 6S80ME-C9	7.7	C
895	MSC LISA IMO 9281279	5,059 TEU	2004	294 m	HSD ENGINE CO., LTD. 9 K 90 MC-C	7.7	C
894	CMA CGM TITUS IMO 9450636	8,500 TEU	2010	334 m	MAN - 12K98ME-C	7.7	C
898	MSC BREMEN IMO 9369734	5,029 TEU	2007	294 m	Wärtsilä - 8RT-flex96C	7.7	C
900	GSL SUSAN IMO 9349617	4,363 TEU	2008	260 m	MAN - 8K90MC-C	7.7	C
899	TSINGTAO EXPRESS IMO 9320702	8,606 TEU	2007	335 m	MAN - 12K98ME	7.7	C

Page 18 of 42 — 2,098 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 2024 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.