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)

#145 of 2,221 container ships

CO₂ intensity

4.2 g CO₂/dwt·nm

vs segment average (9.9)

-58% 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
101	CMA CGM IGUACU IMO 9859131	15,128 TEU	2021	366 m	Hyundai Heavy Industries Co. Ltd. 11G90ME-C10-GI-EGRTC	4.0	A
102	DAMIETTA EXPRESS IMO 9543108	23,660 TEU	2024	400 m	11G95ME-C10-GI	4.0	A
103	CMA CGM ARGENTINA IMO 9839909	15,128 TEU	2019	366 m	Hyundai - 11G90ME-C10	4.1	A
104	MONACO MAERSK IMO 9778832	20,568 TEU	2017	399 m	Doosan - 7G80ME-C9	4.1	A
105	CMA CGM SORBONNE IMO 9839210	22,448 TEU	2021	400 m	CSSC - 12X92DF	4.1	A
110	CMA CGM BALI IMO 9867827	15,128 TEU	2021	366 m	Hyundai - 11G90ME-C10	4.1	A
109	MAASTRICHT MAERSK IMO 9780483	20,568 TEU	2015	399 m	Doosan - 7G80ME-C9	4.1	A
108	ARTHUR MAERSK IMO 9961829	16,592 TEU	2025	351 m	HD Hyundai Heavy Industries Co Ltd - South Korea 8G95ME-C10-LGIM	4.1	A
107	WILHELMSHAVEN EXPRESS IMO 9943918	23,660 TEU	2025	400 m	UnKnown 11G95ME-C10-GI	4.1	A
106	MSC CHINA IMO 9936642	272,131	2023	400 m	UnKnown 11X92	4.1	A
113	ADRIAN MAERSK IMO 9948815	16,592 TEU	2024	351 m	HD Hyundai Heavy Industries Co Ltd - South Korea 8G95ME-C10-LGIM	4.1	A
112	MSC C. MONTAINE IMO 9930961	15,500 TEU	2023	366 m	MAN - 9G95ME-C10	4.1	A
114	CMA CGM PLATINUM IMO 9996707	147,196	2025	335 m	MAN-B&W 7G90ME-C10-LGIM	4.1	A
111	MSC ANITA IMO 9947146	16,000 TEU	2024	366 m	China Shipbuilding Industry Co Diesel Engine Co Ltd 9X92-B-HPSCR	4.1	A
115	CMA CGM HOPE IMO 9897755	15,128 TEU	2021	366 m	Hyundai - 11G90ME-C10-GI	4.1	A
117	HAMBURG EXPRESS IMO 9943865	23,660 TEU	2024	400 m	11G95ME-C10-GI	4.1	A
116	YM WORLD IMO 9684653	14,080 TEU	2015	368 m	MAN - 11S90ME-C9	4.1	A
118	OOCL GDYNIA IMO 9908102	24,188 TEU	2023	400 m	HSD Engine Co Ltd - South Korea 12X92DF	4.1	A
119	MANILA MAERSK IMO 9780469	20,568 TEU	2018	399 m	Doosan - 7G80ME-C9	4.1	A
120	GENOVA EXPRESS IMO 9943906	23,660 TEU	2025	400 m	UnKnown 11G95ME-C10-GI	4.1	A
126	MSC IERANTO IMO 9963619	15,600 TEU	2025	368 m	9G95ME-C10-GI	4.1	A
125	GDANSK EXPRESS IMO 9943877	23,660 TEU	2024	400 m	11G95ME-C10-GI	4.1	A
124	ANE MAERSK IMO 9948748	16,592 TEU	2021	351 m	Hyundai Heavy Industries Co Ltd - South Korea 8G95ME-C10-LGIM	4.1	A
123	CMA CGM UNITY IMO 9897767	15,128 TEU	2021	366 m	Hyundai Heavy Industries Co Ltd - South Korea 11G90ME-C10-GI-EGRTC	4.1	A
122	YM WISH IMO 9684641	15,000 TEU	2015	368 m	MAN - 11S90ME-C9	4.1	A
127	OOCL PORTUGAL IMO 9922615	24,000 TEU	2024	400 m	12X92	4.1	A
121	MSC TURKIYE IMO 9931288	24,000 TEU	2023	400 m	HD Hyundai Heavy Industries Co Ltd - South Korea 11X92	4.1	A
130	CMA CGM CONCORDE IMO 9839208	22,448 TEU	2021	400 m	CSSC - 12X92DF	4.1	A
129	MSC VIVIANA IMO 9777216	17,273 TEU	2017	400 m	Doosan - 11G95ME-C9	4.1	A
128	MSC LEILA IMO 1016654	139,646	2025	335 m	MAN-B&W 6G90ME-C10-GI	4.1	A
131	MAERSK CAMDEN IMO 9924194	15,500 TEU	2022	366 m	MAN - 9G95ME-C10	4.1	A
132	MSC IDANIA IMO 9962562	202,562	2024	366 m	MAN-B&W 8G95ME-C10	4.1	A
135	MSC VICTORINE IMO 9946867	16,000 TEU	2023	366 m	China Shipbuilding Industry Co Diesel Engine Co Ltd 9X92-HPSCR	4.1	A
134	ALBERT MAERSK IMO 9961805	14,942 TEU	2025	351 m	HD Hyundai Heavy Industries Co Ltd - South Korea 8G95ME-C10-LGIM	4.1	A
133	MSC FREYA IMO 9932062	15,264 TEU	2023	366 m	HD Hyundai Heavy Industries Co Ltd - South Korea 11G90ME-C10-GI	4.1	A
138	CMA CGM GRACE BAY IMO 9938145	15,000 TEU	2024	366 m	Wärtsilä - 10X92DF	4.1	A
137	CMA CGM TENERE IMO 9859117	15,128 TEU	2020	366 m	Hyundai - 11G90ME-C10-GI	4.1	A
136	CMA CGM GALAPAGOS IMO 9894997	15,000 TEU	2022	366 m	Wärtsilä - 10X92DF	4.1	A
139	MSC BERANGERE IMO 9930947	15,500 TEU	2023	366 m	MAN - 9G95ME-C10	4.2	A
140	ONE TREASURE IMO 9773222	20,150 TEU	2018	400 m	Mitsui - 11G95ME-C9	4.2	A
144	CMA CGM BIG SUR IMO 9938169	15,000 TEU	2024	366 m	Wärtsilä - 10X92DF	4.2	A
141	MSC MARIELLA IMO 9934747	24,000 TEU	2023	400 m	HD Hyundai Heavy Industries Co Ltd - South Korea 11X92	4.2	A
143	MANILA EXPRESS IMO 9540120	23,660 TEU	2023	400 m	UnKnown 11G95ME-C10-GI	4.2	A
142	CMA CGM MONTMARTRE IMO 9839155	23,500 TEU	2021	400 m	CSSC - 12X92DF	4.2	A
146	MSC ISCHIA IMO 9963633	15,600 TEU	2025	368 m	9G95ME-C10-GI	4.2	A
145	OOCL TURKIYE IMO 9908138	23,000 TEU	2023	400 m	HSD Engine Co Ltd - South Korea 12X92	4.2	A
150	MSC AAYA IMO 9927263	14,812 TEU	2022	366 m	Hyundai Heavy Industries Co Ltd - South Korea 11G90ME-C10-GI	4.2	A
149	MSC RAYA IMO 9930052	24,100 TEU	2023	400 m	UnKnown 11X92	4.2	A
148	MSC ANGOLA IMO 9978729	14,000 TEU	2025	335 m	UnKnown 8X92-B-LPSCR	4.2	A
147	MSC CELESTINO MARESCA IMO 9930040	24,100 TEU	2023	400 m	UnKnown 11X92	4.2	A

Page 3 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.