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)

#1,060 of 2,221 container ships

CO₂ intensity

8.0 g CO₂/dwt·nm

vs segment average (9.9)

-19% 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
1051	LARS MAERSK IMO 9294379	4,300 TEU	2004	267 m	Doosan - 8RT FLEX 96C	7.9	C
1052	COSCO SHANGHAI IMO 9221097	5,618 TEU	2001	280 m	Kawasaki - 10L90MC	7.9	C
1053	CMA CGM HARMONY IMO 9952828	7,000 TEU	2021	272 m	Hyundai Heavy Industries Co Ltd - South Korea 7G80ME-C10-HPSCR	7.9	C
1054	LONDON EXPRESS IMO 9143568	4,612 TEU	1998	294 m	SAMSUNG HEAVY INDUSTRIES CO., LTD. 9 K 90 MC	8.0	C
1056	MSC FABIENNE IMO 9279965	4,862 TEU	2004	294 m	Hyundai - 9 K 90 MC-C	8.0	C
1055	MAERSK LEON IMO 9526966	8,700 TEU	2012	300 m	Doosan - 9S90ME-C MK8	8.0	C
1058	HMM PLATINUM IMO 9637155	5,000 TEU	2013	255 m	Hyundai - 6RT-flex82T	8.0	C
1057	MSC JERSEY IMO 9622007	4,800 TEU	2014	250 m	MAN - 6S80ME-C9	8.0	C
1059	MSC LILY IMO 9704960	8,800 TEU	2015	300 m	MAN - 9S90ME-C9	8.0	C
1060	ROTTERDAM IMO 9398450	9,262 TEU	2010	349 m	MAN - 12K98MC	8.0	C
1061	W KYRENIA IMO 9211494	6,802 TEU	2001	300 m	Sulzer - 12RTA96C	8.0	C
1062	CMA CGM NABUCCO IMO 9299630	8,200 TEU	2006	334 m	Hyundai - 12 K98MC	8.0	C
1063	WIKING IMO 9708382	4,771 TEU	2016	255 m	MAN - 6S80ME-C9	8.0	C
1066	CMA CGM CHIWAN IMO 9224312	4,253 TEU	2001	260 m	8K90MC-C	8.0	C
1065	CONTI CHIVALRY IMO 9293791	8,084 TEU	2006	334 m	Sulzer - 12RTA96C	8.0	C
1064	SANTA CLARA MAERSK IMO 9444716	7,090 TEU	2010	300 m	Wärtsilä - 8RT-flex96C	8.0	C
1067	KOTA KAYA IMO 9307401	3,081 TEU	2005	233 m	Mitsui - 7S70MC-C	8.0	C
1068	MSC ROSHNEY V IMO 9337676	4,888 TEU	2007	294 m	MAN - 9K98ME-C	8.0	C
1069	EVER EXCEL IMO 9241322	6,323 TEU	2002	300 m	Sulzer - 12RTA84C	8.1	C
1070	KOTKA IMO 9085534	6,418 TEU	1996	318 m	Mitsui - 12K90MC	8.1	C
1072	ACHELOOS IMO 9972995	2,800 TEU	2024	186 m	MAN-B&W 6S60ME-C10	8.1	C
1071	MAERSK IDAHO IMO 9193264	4,338 TEU	2000	292 m	Hyundai - 10K90MC-C	8.1	C
1074	HMM COLOMBO IMO 9323508	6,763 TEU	2007	304 m	MAN - 12K98MC-C	8.1	C
1073	MONTE TAMARO IMO 9357949	4,000 TEU	2007	272 m	Wärtsilä - 8RTA96C	8.1	C
1075	MSC VIDHI IMO 9238739	5,514 TEU	2001	277 m	Doosan - 12K90MC	8.1	C
1076	NYK ROMULUS IMO 9416989	4,888 TEU	2010	294 m	MAN - 9K98ME-C	8.1	C
1077	SANTA INES IMO 9444845	7,114 TEU	2012	300 m	Doosan - 8RT FLEX 96C	8.1	C
1079	MSC ELBE III IMO 9236688	2,524 TEU	2001	208 m	MANISES DIESEL - 7 L 70 MC	8.1	C
1078	MSC ELA IMO 9282259	4,900 TEU	2004	294 m	HSD ENGINE CO., LTD. 9 K 90 MC	8.1	C
1082	API BHUM IMO 9292149	4,944 TEU	2004	294 m	HSD ENGINE CO., LTD. 9 K 90 MC-C	8.1	C
1081	MSC BRUNELLA IMO 9702106	8,819 TEU	2015	300 m	MAN - 9S90ME-C9	8.1	C
1080	MAERSK UTAH IMO 9305300	4,154 TEU	2006	292 m	Sulzer - 8RT-flex96C	8.1	C
1083	MSC TIANJIN IMO 9285471	8,063 TEU	2005	323 m	MAN - 12K98MC-C	8.1	C
1084	MSC JOHANNESBURG V IMO 9252242	4,200 TEU	2003	266 m	Sulzer - 9RTA84C	8.1	C
1086	NINGBO IMO 9398400	7,500 TEU	2009	334 m	MAN - 12K98MC	8.1	C
1085	MSC SAMANTHA VI IMO 9110377	5,551 TEU	1996	275 m	Hyundai - 12K90MC-C	8.1	C
1087	GREEN BAY IMO 9983437	2,954 TEU	2022	186 m	Yuchai Marine Power Co. Ltd. 7S60ME-C10	8.1	C
1089	MSC ATLANTIC III IMO 8913447	2,668 TEU	1991	237 m	BREMER VULKAN AG SCHIFFBAU UND MASCHINENFABRIK 7 L 80 MC	8.1	C
1088	HMM OAKLAND IMO 9385013	6,350 TEU	2009	293 m	MAN - 11K98MC	8.1	C
1090	JOLLY ARGENTO IMO 9467043	4,600 TEU	2010	264 m	MAN - 8K90MC-C	8.2	C
1091	MSC LAGOS X IMO 9605152	9,400 TEU	2013	300 m	Hyundai - 9S90ME-C9	8.2	C
1092	MSC SUEZ IMO 8918978	2,668 TEU	1993	237 m	BREMER VULKAN AG SCHIFFBAU UND MASCHINENFABRIK 7 L 80 MC	8.2	C
1095	HMM TACOMA IMO 9385001	6,350 TEU	2009	293 m	MAN - 11K98MC	8.2	C
1094	MSC PRELUDE V IMO 9450325	4,600 TEU	2009	264 m	MAN - 8K90MC-C	8.2	C
1093	FORT DESAIX IMO 9400174	4,043 TEU	2010	269 m	Wärtsilä - 7RT-FLEX96C	8.2	C
1098	MOL PROFICIENCY IMO 9403619	6,350 TEU	2007	293 m	MAN - 11K98MC	8.2	C
1097	YM CREDIBILITY IMO 9864564	2,800 TEU	2021	210 m	MAN - 7S70ME-C	8.2	C
1096	SEASPAN OCEANIA IMO 9286009	8,468 TEU	2004	334 m	MAN - 12K98MC-C	8.2	C
1100	MSC LISA IMO 9281279	5,059 TEU	2004	294 m	HSD ENGINE CO., LTD. 9 K 90 MC-C	8.2	C
1099	MSC MICHIGAN VII IMO 9196864	6,420 TEU	2000	304 m	Hyundai - 10 K 98 MC-C	8.2	C

Page 22 of 45 — 2,221 vessels

← Prev Next →

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.