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)

#802 of 2,221 container ships

CO₂ intensity

6.7 g CO₂/dwt·nm

vs segment average (9.9)

-32% 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
799	MAERSK SAVANNAH IMO 9352028	8,400 TEU	2008	334 m	HHI - 12K98ME MK7	6.7	B
802	MSC GIOVANNA VII IMO 9153850	6,690 TEU	1996	300 m	ISHIKAWAJIMA - 12RTA96C	6.7	B
804	ONE HARBOUR IMO 9302152	8,212 TEU	2007	336 m	MAN - 12K98ME	6.8	B
803	CZECH IMO 9723241	9,040 TEU	2015	300 m	Wärtsilä - 8X92	6.8	B
805	MSC DOMITILLE IMO 9720201	9,400 TEU	2015	300 m	MAN - 9S90ME-C10	6.8	B
806	MSC VITA IMO 9702089	8,800 TEU	2015	300 m	MAN - 9S90ME-C10	6.8	B
809	SANTA ROSA IMO 9430363	7,114 TEU	2007	300 m	Doosan - 8RT FLEX 96C	6.8	B
808	ONE HANOI IMO 9588093	8,974 TEU	2013	335 m	Kawasaki - 12K98MEMKVI	6.8	B
807	MSC DARIEN IMO 9243394	7,731 TEU	2003	323 m	Doosan - 12K98MC-C	6.8	B
810	SEASPAN AMAZON IMO 9630391	10,100 TEU	2014	337 m	MAN - 10S90ME-C9	6.8	B
812	NYK CONSTELLATION IMO 9337626	4,888 TEU	2007	294 m	MAN - 9K98MC-C	6.8	B
811	MEXICO EXPRESS IMO 9686900	6,428 TEU	2015	271 m	MAN - 8G80ME-C9	6.8	B
813	ONE HAMMERSMITH IMO 9395147	8,212 TEU	2009	336 m	Kawasaki - 12K98ME	6.8	B
814	CMA CGM MUSSET IMO 9406611	6,570 TEU	2010	300 m	MAN - 10K98MC-C	6.8	B
815	ZIM ALEXANDRITE IMO 9968085	7,000 TEU	2024	272 m	Hudong Heavy Machinery Co Ltd - China 7G80ME-C10-GI-ERGTC	6.8	B
817	APL GWANGYANG IMO 9461879	10,106 TEU	2011	349 m	Hyundai - 12 K 98 ME	6.8	B
816	MSC LETIZIA IMO 9702065	8,800 TEU	2015	300 m	MAN - 9S90ME-C9	6.8	B
818	MSC MARIA ELENA IMO 9304423	9,200 TEU	2006	337 m	Doosan - 12K98MC-C	6.8	B
819	PANDA 007 IMO 9280598	5,762 TEU	2004	277 m	Hyundai - 10 K 98 MC-C	6.8	B
820	ZIM TOPAZ IMO 9968023	7,000 TEU	2024	272 m	Hudong Heavy Machinery Co Ltd - China 7G80ME-C10-GI-ERGTC	6.8	B
821	MSC SARA ELENA IMO 9702261	8,800 TEU	2015	300 m	MAN - 9S90ME-C10	6.8	B
822	MSC ALBANY IMO 9619438	8,886 TEU	2013	299 m	MAN - 9S90ME-C8	6.9	B
823	NAVIOS CONSTELLATION IMO 9408877	10,000 TEU	2011	350 m	Wärtsilä - 12RT-flex96C	6.9	B
824	MSC JOANNA IMO 9304435	9,200 TEU	2006	337 m	MAN - 12K98MC-C	6.9	B
827	MAERSK GENOA IMO 9739680	10,100 TEU	2016	337 m	CSSC - 10S90ME-C9	6.9	B
826	MED MERSIN IMO 9135638	2,908 TEU	1996	196 m	Hyundai - 8 RTA 72 U	6.9	B
825	MSC ADONIS IMO 9706310	9,288 TEU	2015	300 m	Wärtsilä - 9X82	6.9	B
828	COSCO SHIPPING VOLGA IMO 9731925	9,092 TEU	2017	300 m	CSSC - 8S90ME-C10	6.9	B
829	BELITA IMO 9318060	8,204 TEU	2006	334 m	MAN - 12K98MC	6.9	B
830	COSCO SHIPPING SEINE IMO 9731949	9,092 TEU	2017	300 m	CSSC - 9S90ME-C10	6.9	B
831	SOFIA EXPRESS IMO 9450404	8,600 TEU	2010	335 m	MAN - 10K98ME	6.9	B
832	CMA CGM YUKON IMO 9732606	9,443 TEU	2016	300 m	Wärtsilä - 9X82	7.0	B
835	MSC SASHA IMO 9720500	8,800 TEU	2016	300 m	Hyundai - 9S90ME-C10	7.0	B
834	EVER LUCENT IMO 9629067	8,488 TEU	2011	335 m	HHI - 9K98ME7.1	7.0	B
833	OSAKA IMO 9670834	3,868 TEU	2013	228 m	MAN - 7S70ME-C8	7.0	B
837	MAERSK MONTE ROSA IMO 9283215	4,000 TEU	2005	272 m	Wärtsilä - 8RTA96C-B	7.0	B
836	MSC RUBY IMO 9502960	13,092 TEU	2013	366 m	Wärtsilä - 12RT-flex96C	7.0	B
841	MSC ASYA IMO 9339296	9,200 TEU	2008	337 m	MAN - 12K98MC-C	7.0	B
840	MSC CHLOE IMO 9720483	9,400 TEU	2016	300 m	MAN - 9S90ME-C10	7.0	B
839	MSC GREENWICH IMO 9286267	8,189 TEU	2004	334 m	Hyundai - 12 K98MC	7.0	B
838	APL BOSTON IMO 9597496	9,200 TEU	2013	328 m	Doosan - 10S90ME-C MK9.2 TIER 2	7.0	B
842	PRAGUE EXPRESS IMO 9450399	8,600 TEU	2010	336 m	MAN - 10K98ME	7.0	B
844	SAPPHIRE TOWER IMO 9618290	8,800 TEU	2013	300 m	Hyundai - 9S90ME-C8	7.0	B
843	MAERSK CALABAR IMO 9525302	4,500 TEU	2011	249 m	HHI - 6S80ME-C9	7.0	B
845	HERMANN SCHULTE IMO 9535187	5,605 TEU	2012	275 m	MAN - 8K98ME	7.0	B
849	MAERSK LONDRINA IMO 9527037	8,700 TEU	2008	300 m	Doosan - MAN 9S90ME-C MK8	7.0	B
848	OOCL LUXEMBOURG IMO 9417270	8,063 TEU	2006	323 m	MAN - 12K98ME-C	7.0	B
847	MSC SUSANNA IMO 9290543	9,200 TEU	2005	337 m	MAN - 12K98MC-C	7.0	B
846	MSC CHANNE IMO 9710438	8,800 TEU	2015	300 m	MAN - 9S90ME-C10	7.0	B
850	MAERSK MONTE ALTO IMO 9283227	4,000 TEU	2004	272 m	Wärtsilä - 8RTA96C	7.0	B

Page 17 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.