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)

#973 of 2,221 container ships

CO₂ intensity

7.6 g CO₂/dwt·nm

vs segment average (9.9)

-24% 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
951	NANSHA EXPRESS IMO 9778131	10,100 TEU	2018	336 m	CSSC - 10S90ME-C9	7.5	C
952	W KLAIPEDA IMO 9211482	6,802 TEU	2001	300 m	HHI - 12RTA96C	7.5	C
954	MSC LAUSANNE VI IMO 9320398	4,549 TEU	2005	283 m	MAN - 7K98MC-C	7.5	C
953	SEASPAN EMISSARY IMO 9407158	5,041 TEU	2009	294 m	Wärtsilä - 8RTA96C	7.5	C
956	MSC ATHENS IMO 9618305	8,800 TEU	2013	300 m	Hyundai - 9S90ME-C8.2	7.5	C
955	MSC ELENI IMO 9278143	5,050 TEU	2004	294 m	HSD ENGINE CO., LTD. 9 K 90 MC-C	7.5	C
957	OSAKA EXPRESS IMO 9320697	8,606 TEU	2007	335 m	MAN - 12K98ME	7.5	C
959	SANTA VIOLA IMO 9295373	5,599 TEU	2005	275 m	Hyundai - 10 K 98 MC-C	7.5	C
958	VILNIA MAERSK IMO 9778533	3,700 TEU	2019	200 m	MAN - 6G60ME-C9	7.5	C
961	SANTA RITA IMO 9425382	7,114 TEU	2011	300 m	Doosan - 8RT FLEX 96C	7.5	C
960	ZIM NORFOLK IMO 9710220	9,000 TEU	2015	300 m	MAN - 9G80ME-C9	7.5	C
963	MAERSK HARTFORD IMO 9333008	6,200 TEU	2007	299 m	Doosan - 10RT-flex96C	7.5	C
962	ANNIE B IMO 9253026	2,826 TEU	2003	222 m	Hyundai - 7K80MC-C	7.5	C
964	MSC JULIE IMO 9704996	8,800 TEU	2015	300 m	MAN - 9S90ME-C9	7.5	C
965	ZIM AMERICA IMO 9244934	6,246 TEU	2003	304 m	Hyundai - 10 K 98 MC-C	7.5	C
966	MSC HEIDI IMO 9309473	8,400 TEU	2006	332 m	MAN - 12K98MC-C	7.5	C
968	MSC ELISA XIII IMO 9463059	13,092 TEU	2011	366 m	MAN - 12K98ME-C7	7.5	C
967	KOI IMO 9461489	8,600 TEU	2011	335 m	Wärtsilä - 12RT-flex96C	7.5	C
970	MSC CATERINA IMO 9705005	8,800 TEU	2015	300 m	MAN - 9S90ME-C9	7.5	C
969	EMERALD TOWER IMO 9618288	8,800 TEU	2013	300 m	Hyundai - 9S90ME-C8	7.5	C
972	CMA CGM ESTELLE IMO 9729116	9,400 TEU	2018	300 m	CSSC - 9S90ME-C9	7.5	C
971	EVER LOADING IMO 9629081	8,508 TEU	2014	335 m	MAN - 9K98ME7	7.5	C
975	CMA CGM LAMARTINE IMO 9409194	6,500 TEU	2010	300 m	MAN - 10K98MC-C	7.6	C
977	OOCL ST. LAWRENCE IMO 9290414	5,042 TEU	2005	295 m	Sulzer - 8RTA96C	7.6	C
974	MSC SORAYA IMO 9372494	5,770 TEU	2008	277 m	MAN - 9K98MC	7.6	C
973	MAERSK CAPE COAST IMO 9525314	4,500 TEU	2011	249 m	HHI - 6S80ME-C9	7.6	C
976	CMA CGM IMAGINATION IMO 9948231	6,874 TEU	2024	272 m	Hyundai Heavy Industries Co Ltd - South Korea 7G80ME-C10-HPSCR	7.6	C
979	MSC KRYSTAL IMO 9372470	5,800 TEU	2008	277 m	MAN - 12 K 90 MC	7.6	C
978	MSC JEONGMIN IMO 9720471	9,411 TEU	2016	300 m	Hyundai - 9S90ME-C10	7.6	C
980	CMA CGM LOIRE IMO 9674531	9,365 TEU	2015	300 m	Hyundai - 9S90ME-C9	7.6	C
981	CMA CGM RODOLPHE IMO 9729075	9,400 TEU	2017	300 m	CSSC - 9S90ME-C9	7.6	C
982	HUDSON EXPRESS IMO 9349564	6,435 TEU	2008	306 m	Wärtsilä - 11RT-flex96C	7.6	C
985	YANTIAN IMO 9305594	9,383 TEU	2006	351 m	MAN - 12K98MC	7.6	C
984	CHACABUCO IMO 9295957	5,527 TEU	2006	276 m	Sulzer - 10RT-flex96C	7.6	C
983	CMA CGM BOLDNESS IMO 9948243	6,874 TEU	2021	272 m	Hyundai Heavy Industries Co Ltd - South Korea 7G80ME-C10-HPSCR	7.6	C
986	MSC ANYA V IMO 9297864	5,018 TEU	2005	294 m	Sulzer - 9RTA96C	7.6	C
988	MAERSK SENANG IMO 9315240	5,648 TEU	2007	318 m	Wärtsilä - 11RT-flex96C	7.6	C
987	MAERSK NUBA IMO 9356115	2,478 TEU	2008	210 m	Doosan - 7L70ME-C	7.6	C
989	MSC LUANDA VIII IMO 9301471	8,204 TEU	2006	334 m	MAN - 12K98MC	7.6	C
990	MSC JESSENIA R IMO 9215672	3,799 TEU	2001	257 m	Sulzer - 7RTA84	7.6	C
991	GSL CHATEAU D'IF IMO 9335202	5,089 TEU	2007	294 m	MAN - 9K90MC-C	7.6	C
994	CMA CGM WISDOM IMO 9952830	6,874 TEU	2021	272 m	7G80ME-C10-HPSCR	7.6	C
993	SANTA CATARINA IMO 9444730	7,090 TEU	2007	300 m	Wärtsilä - 8RT-flex96C	7.6	C
992	NYK REMUS IMO 9416965	4,888 TEU	2009	294 m	MAN - 9K98ME-C	7.6	C
995	MSC MAUREEN IMO 9251717	6,750 TEU	2003	300 m	HSD ENGINE CO., LTD. 10 K 98 MC-C	7.6	C
998	SYNERGY ANTWERP IMO 9443580	4,253 TEU	2008	260 m	MAN - 8K90MC-C	7.7	C
997	VALUE IMO 9628166	8,800 TEU	2013	300 m	MAN - 9S90ME-C8	7.7	C
996	MSC LUISA IMO 9225677	6,750 TEU	2002	300 m	HSD ENGINE CO., LTD. 10 K 98 MC-C	7.7	C
1000	MSC PILAR VI IMO 9248148	5,752 TEU	2003	279 m	Sulzer - 10RTA96C	7.7	C
999	YM CONTINUITY IMO 9864590	2,800 TEU	2018	210 m	MAN - 7S70ME-C	7.7	C

Page 20 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.