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)

#1,232 of 2,098 container ships

CO₂ intensity

9.6 g CO₂/dwt·nm

vs segment average (10.39)

-7% 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
1201	GH MAESTRO IMO 9449118	3,635 TEU	2012	239 m	MAN - 7K90MC-C	9.4	C
1202	BF HAMBURG IMO 9332860	6,350 TEU	2009	293 m	MAN - 11K98MC	9.4	C
1203	IONIKOS IMO 9397614	4,308 TEU	2009	260 m	MAN - 8K90MC-C	9.4	C
1204	CMA CGM GUARANI IMO 9234135	2,470 TEU	2002	207 m	Wärtsilä - 7 RTA 72 U-B	9.4	C
1205	MSC VIGO IMO 9480227	5,550 TEU	2012	270 m	Doosan - 7K98MC-C	9.4	C
1206	MAERSK JAIPUR IMO 9343974	2,824 TEU	2008	222 m	MAN - 7K80MC-C	9.4	C
1207	MSC YAMUNA VI IMO 9288409	5,888 TEU	2004	281 m	MAN - 10K98MC	9.5	C
1208	GREEN BAY IMO 9983437	2,954 TEU	2022	186 m	Yuchai Marine Power Co. Ltd. 7S60ME-C10	9.5	C
1209	LE HAVRE EXPRESS IMO 9332872	6,350 TEU	2009	293 m	MAN - 11K98MC	9.5	C
1210	GFS GENESIS IMO 9704659	4,350 TEU	2015	240 m	MAN - 7G70ME-C9	9.5	C
1211	BOSTON IMO 9315355	3,500 TEU	2007	247 m	STX - 9 K80MC-C	9.5	C
1212	MSC IKARIA VI IMO 9261449	4,492 TEU	2002	279 m	Sulzer - 11RTA96C	9.5	C
1213	MSC AJACCIO IMO 9605267	9,400 TEU	2014	300 m	MAN - 9S90ME-C9	9.5	C
1214	INDEPENDENT HORIZON IMO 9334375	3,091 TEU	2008	220 m	MAN - 7K80MC-C	9.5	C
1215	APL OREGON IMO 9532783	6,350 TEU	2010	293 m	Mitsui - 11K98MC	9.5	C
1216	CMA CGM AFRICA FOUR IMO 9451965	3,600 TEU	2010	228 m	Wärtsilä - 7RT-flex82C	9.5	C
1217	VIKING ORCA IMO 9555254	1,800 TEU	2023	172 m	MAN-B&W 6S60ME-C10	9.5	C
1218	PORT GDYNIA IMO 9334387	3,091 TEU	2011	220 m	MAN - 7K80MC-C	9.6	C
1219	SAFMARINE NOMAZWE IMO 9294381	4,045 TEU	2004	266 m	Sulzer - 8RT-flex96C	9.6	C
1220	MSC ALBANY IMO 9619438	8,886 TEU	2013	299 m	MAN - 9S90ME-C8	9.6	C
1221	MSC ARUSHI R. IMO 9244881	4,112 TEU	2002	281 m	Sulzer - 9RTA96C	9.6	C
1222	CMA CGM NAVEGANTES IMO 9303780	2,824 TEU	2006	222 m	MAN - 7K80MC-C	9.6	C
1223	CMA CGM MONTOIR IMO 9348443	4,319 TEU	2008	264 m	MAN - 8K90MC-C	9.6	C
1224	MERKUR HORIZON IMO 9456989	4,300 TEU	2009	262 m	Wärtsilä - 8RTA82C	9.6	C
1225	LEDA MAERSK IMO 9190755	4,045 TEU	2001	266 m	Doosan - 10K90MC	9.6	C
1226	MSC NADRIELY IMO 9149328	2,468 TEU	1998	208 m	DIESELMOTORENWERK VULKAN GMBH WERK ROSTOCK 7 L 70 MC	9.6	C
1227	XIN WEI HAI IMO 9312573	4,250 TEU	2006	263 m	Doosan - 8K90MC-1	9.6	C
1228	ZIM PACIFIC IMO 9440837	4,300 TEU	2009	262 m	Hyundai - 8RTA82C	9.6	C
1229	MSC MIRELLA R IMO 9293179	4,922 TEU	2005	294 m	Hyundai - 9 RTA96C-B	9.6	C
1230	SEASPAN BRISBANE IMO 9290139	4,253 TEU	2005	260 m	8K90MC-C	9.6	C
1231	MSC ALIX 3 IMO 9166651	2,452 TEU	1998	200 m	Mitsubishi - 8UEC60LS	9.6	C
1232	GREEN SEA IMO 9865996	1,800 TEU	2020	172 m	MAN - 6S60ME-C10	9.7	C
1233	GLASGOW EXPRESS IMO 9232589	4,115 TEU	2002	281 m	Sulzer - 9RTA96C	9.7	C
1234	MONTPELLIER IMO 9314973	2,824 TEU	2006	222 m	Hyundai - 7K80MC-C	9.7	C
1235	IRENES WISDOM IMO 9953391	2,782 TEU	2023	186 m	Hyundai Heavy Industries Co Ltd - South Korea 6S60ME-C10-HPSCR	9.7	C
1236	LEXA MAERSK IMO 9190767	3,700 TEU	2001	266 m	10K90MC	9.7	C
1237	CASABLANCA A IMO 9330903	1,440 TEU	2006	170 m	MAN - 8S50MC-C	9.7	C
1238	SONGA PANTHER IMO 9947732	1,692 TEU	2023	172 m	China Shipbuilding Industry Co Diesel Engine Co Ltd 6S60ME-C10.5	9.7	C
1239	CMA CGM MONTREAL IMO 9363417	2,401 TEU	2007	200 m	MAN - 7S70MC-C	9.7	C
1240	CAPE CORFU IMO 9857432	2,700 TEU	2021	186 m	MAN - 6G60ME-C9	9.7	C
1241	MAERSK VALLETTA IMO 9833369	1,800 TEU	2019	172 m	Wärtsilä - 6RT-flex58T-E	9.7	C
1242	MSC ANNICK IMO 9169122	3,987 TEU	1998	261 m	Sulzer - 9RTA84C	9.7	C
1243	MARIUS IMO 9802504	2,500 TEU	2018	195 m	Hudong Heavy Machinery - 6G60ME-C9	9.7	C
1244	MAERSK BENGUELA IMO 9355367	3,078 TEU	2005	223 m	Hyundai - 8K80ME-C	9.8	C
1245	MSC ANTWERP III IMO 9304746	2,490 TEU	2005	212 m	Hyundai - 7 RTA 72 U-B	9.8	C
1246	MSC MARIA PIA IMO 9155107	2,808 TEU	1997	196 m	Hyundai - 8 RTA 72 U	9.8	C
1247	CMA CGM FORT ST.GEORGES IMO 9261918	2,226 TEU	2003	197 m	HSD ENGINE CO. LTD. 8S70MC	9.8	C
1248	MSC PORTO III IMO 9299020	2,478 TEU	2004	208 m	Hitachi - 7 L70MC-C	9.8	C
1249	TAMPA I IMO 9196840	6,252 TEU	2000	304 m	Hyundai - 10 K 98 MC-C	9.8	C
1250	MSC DONATA IMO 9237151	3,900 TEU	2002	258 m	Sulzer - 9RTA84C	9.8	C

Page 25 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.