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)

#207 of 2,098 container ships

CO₂ intensity

4.7 g CO₂/dwt·nm

vs segment average (10.39)

-55% 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
199	MILAN MAERSK IMO 9778820	20,568 TEU	2017	399 m	Doosan - 7G80ME-C9	4.7	A
203	MSC AMSTERDAM IMO 9606338	16,652 TEU	2015	399 m	STX - 12K98MC-C	4.7	A
202	EVER MERCY IMO 9935325	15,500 TEU	2024	366 m	WinGD 9X92	4.7	A
205	MANILA MAERSK IMO 9780469	20,568 TEU	2018	399 m	Doosan - 7G80ME-C9	4.7	A
204	COSCO HOPE IMO 9472165	13,092 TEU	2012	366 m	Hyundai - 12 K98MC	4.7	A
206	COSCO SHIPPING LEO IMO 9783502	20,000 TEU	2018	400 m	CSSC - 11S90ME-C10	4.7	A
209	MAERSK EL PALOMAR IMO 9964481	13,000 TEU	2024	335 m	MAN-B&W 9G95ME-C10	4.7	A
208	CHARLESTON EXPRESS IMO 9665645	13,800 TEU	2014	368 m	MAN - 11S90ME-C9	4.7	A
210	MARY MAERSK IMO 9619921	18,270 TEU	2013	399 m	Doosan - 8S80ME-C MK9.2	4.7	A
207	MOGENS MAERSK IMO 9632090	18,270 TEU	2014	399 m	Doosan - 7S80ME-C	4.7	A
211	MARSTAL MAERSK IMO 9619971	18,270 TEU	2014	399 m	Doosan - 8S80ME-C MK9.2	4.7	A
212	MAYVIEW MAERSK IMO 9619995	18,270 TEU	2014	399 m	Doosan - 8S80ME-C MK9.2 TIER II	4.7	A
213	MSC ERICA IMO 9755191	15,909 TEU	2016	399 m	Doosan - 11G95ME-C9.2	4.7	A
215	CMA CGM BIG SUR IMO 9938169	15,000 TEU	2024	366 m	Wärtsilä - 10X92DF	4.7	A
217	ZEUS LUMOS IMO 9864239	15,000 TEU	2021	366 m	Wärtsilä - 10X92	4.7	A
214	COSCO SHIPPING SOLAR IMO 9795646	21,000 TEU	2019	400 m	CSSC - 12S90ME-C10	4.7	A
218	COSCO SHIPPING NEBULA IMO 9795622	21,000 TEU	2018	400 m	CSSC - 12S90ME-C10	4.7	A
216	MAERSK CANDOR IMO 9924223	15,500 TEU	2022	366 m	MAN - 9G95ME-C10	4.7	A
221	MAERSK CAMBRIDGE IMO 9924182	15,500 TEU	2022	366 m	MAN - 9G95ME-C10	4.8	A
220	MSC MARA IMO 9932892	15,600 TEU	2023	364 m	Hyundai Heavy Industries Co Ltd - South Korea 8X92-B	4.8	A
219	CMA CGM UNITY IMO 9897767	15,128 TEU	2021	366 m	Hyundai Heavy Industries Co Ltd - South Korea 11G90ME-C10-GI-EGRTC	4.8	A
224	MAERSK CLEVELAND IMO 9936408	15,500 TEU	2023	366 m	UnKnown 8G95ME-C10	4.8	A
223	CMA CGM GRACE BAY IMO 9938145	15,000 TEU	2024	366 m	Wärtsilä - 10X92DF	4.8	A
225	MAERSK CANYON IMO 9924235	15,500 TEU	2023	366 m	MAN - 9G95ME-C10	4.8	A
222	EVER ART IMO 9893943	23,764 TEU	2022	400 m	Wartsila-Hyundai Engine Co. Ltd. 11X92-B	4.8	A
226	MAERSK HALIFAX IMO 9784271	15,282 TEU	2017	368 m	Hyundai - 8G95ME-C9	4.8	A
228	MAERSK CAMDEN IMO 9924194	15,500 TEU	2022	366 m	MAN - 9G95ME-C10	4.8	A
227	MSC SAMAR IMO 9839442	22,000 TEU	2019	400 m	MAN - 11G95ME	4.8	A
229	MSC MICHELLE IMO 9897016	23,656 TEU	2021	400 m	Doosan - 9L32/40CD	4.8	A
230	MERETE MAERSK IMO 9632064	18,270 TEU	2014	399 m	Doosan - 7S80ME-C	4.8	A
231	SAN LORENZO MAERSK IMO 9622227	9,669 TEU	2011	333 m	HHI - 7S90-C9.2	4.8	A
232	MSC SOLA IMO 9401104	11,300 TEU	2008	364 m	MAN - 12K98ME	4.8	A
233	LOS ANGELES EXPRESS IMO 9665633	13,800 TEU	2014	368 m	MAN - 11S90ME-C9	4.8	A
235	MADRID MAERSK IMO 9778791	20,568 TEU	2017	399 m	Doosan - 7G80ME-C9	4.8	A
234	EVER MASS IMO 9935234	15,000 TEU	2024	366 m	WinGD 9X92	4.8	A
236	MSC ARINA IMO 9839284	22,000 TEU	2019	400 m	MAN - 11G95ME-C9	4.8	A
237	CMA CGM GALAPAGOS IMO 9894997	15,000 TEU	2022	366 m	Wärtsilä - 10X92DF	4.8	A
239	SAN ANTONIO MAERSK IMO 9622241	9,669 TEU	2014	333 m	HHI - 7S90-C9.2	4.8	A
241	MSC SOFIA IMO 9927275	14,812 TEU	2023	366 m	Hyundai Heavy Industries Co Ltd - South Korea 11G90ME-C10-GI	4.8	A
240	MAERSK MC-KINNEY MOLLER IMO 9619907	18,270 TEU	2013	399 m	Doosan - 8S80ME-C MK9.2	4.8	A
238	MSC NELA IMO 9839296	22,000 TEU	2019	400 m	MAN - 11G95ME	4.8	A
242	MSC DIANA IMO 9755933	17,590 TEU	2016	400 m	Doosan - 11G95ME-C9	4.8	A
244	ALETTE MAERSK IMO 9948774	16,592 TEU	2024	351 m	Hyundai Heavy Industries Co Ltd - South Korea 8G95ME-C10-LGIM	4.8	A
243	MSC MIA IMO 9839466	22,000 TEU	2019	400 m	MAN - 11G95ME	4.8	A
250	COSCO SHIPPING TAURUS IMO 9783459	17,327 TEU	2018	400 m	CSSC - 11S90ME-C10	4.8	A
249	MSC LONDON IMO 9606302	16,652 TEU	2014	399 m	STX - 12K98MC-C	4.8	A
248	ZEAL LUMOS IMO 9864241	15,000 TEU	2021	366 m	Wärtsilä - 10X92	4.8	A
247	HMM PRIDE IMO 9637260	13,154 TEU	2014	366 m	Doosan - 10S90ME-C9	4.8	A
246	MSC AURIGA IMO 9857183	15,000 TEU	2020	366 m	Wärtsilä - 8X92	4.8	A
245	COSCO SHIPPING SCORPIO IMO 9789635	19,000 TEU	2018	400 m	MAN - 11S90ME-C10	4.8	A

Page 5 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.