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)

#220 of 2,221 container ships

CO₂ intensity

4.4 g CO₂/dwt·nm

vs segment average (9.9)

-56% 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
201	MSC LORENZA IMO 9962598	202,562	2024	366 m	MAN-B&W 8G95ME-C10	4.3	A
204	HMM STOCKHOLM IMO 9868352	23,000 TEU	2020	400 m	MAN - 11G95ME-C9	4.4	A
203	OOCL VALENCIA IMO 9922598	24,000 TEU	2020	400 m	CSSC-MES Diesel Co Ltd - China 12X92	4.4	A
202	MOSCOW MAERSK IMO 9778818	20,568 TEU	2015	399 m	Doosan - 7G80ME-C9	4.4	A
206	AXEL MAERSK IMO 9961831	16,592 TEU	2025	351 m	8G95ME-C10-LGIM	4.4	A
205	MSC MARIE IMO 9962574	202,562	2024	366 m	MAN-B&W 8G95ME-C10	4.4	A
207	MSC ANNA IMO 9777204	17,273 TEU	2016	400 m	Doosan - 11G95ME-C9	4.4	A
209	OOCL DENMARK IMO 9922548	24,188 TEU	2020	400 m	CSSC-MES Diesel Co Ltd - China 12X92DF	4.4	A
208	PARANA EXPRESS IMO 9793909	11,800 TEU	2018	330 m	Doosan - 8X92	4.4	A
211	MAERSK MC-KINNEY MOLLER IMO 9619907	18,270 TEU	2013	399 m	Doosan - 8S80ME-C MK9.2	4.4	A
210	MAERSK HORSBURGH IMO 9784269	15,282 TEU	2017	353 m	Hyundai - 8G95ME-C9	4.4	A
213	ONE CRANE IMO 9741401	14,026 TEU	2016	364 m	Diesel United - 9X82	4.4	A
212	HMM PROMISE IMO 9742168	11,000 TEU	2018	330 m	Hyundai - 8G95ME-C9	4.4	A
215	MSC LORETO IMO 9934735	24,000 TEU	2023	400 m	HD Hyundai Heavy Industries Co Ltd - South Korea 11X92	4.4	A
214	MAGLEBY MAERSK IMO 9619957	18,270 TEU	2011	399 m	Doosan - 8S80ME-C MK9.2	4.4	A
216	YM WONDERLAND IMO 9820910	14,000 TEU	2015	366 m	MAN - 11S90ME-C9	4.4	A
217	MAERSK CAMPTON IMO 9924211	15,500 TEU	2022	366 m	MAN - 9G95ME-C10	4.4	A
219	MSC CALYPSO IMO 9932036	15,264 TEU	2023	366 m	Hyundai Heavy Industries Co Ltd - South Korea 11G90ME-C10-GI	4.4	A
218	ZEUS LUMOS IMO 9864239	15,000 TEU	2021	366 m	Wärtsilä - 10X92	4.4	A
220	MAERSK HONG KONG IMO 9784257	15,282 TEU	2017	353 m	Hyundai - 8G95ME-C9	4.4	A
221	MAREN MAERSK IMO 9632129	18,340 TEU	2014	399 m	Doosan - 8S80ME-C9	4.4	A
223	MAERSK CHARLESTON IMO 9936379	15,500 TEU	2023	366 m	UnKnown 8G95ME-C10	4.4	A
222	MAERSK HANGZHOU IMO 9784300	15,282 TEU	2015	353 m	Hyundai - 8G95ME-C9	4.4	A
226	ONE MAGDALENA IMO 9937347	11,923 TEU	2022	330 m	CSSC-MES Diesel Co Ltd - China 8X92	4.4	A
225	YM TOPMOST IMO 9878515	11,850 TEU	2021	334 m	MAN - 9S90ME-C10	4.4	A
224	ZIM SPINEL IMO 9968035	7,000 TEU	2024	272 m	Hudong Heavy Machinery Co Ltd - China 7G80ME-C10-GI-ERGTC	4.4	A
227	HMM PERIDOT IMO 9955258	13,248 TEU	2024	335 m	Hanwha Engine Co Ltd - South Korea 7G95ME-C10-LPSCR	4.4	A
229	MAERSK HIDALGO IMO 9784283	15,282 TEU	2015	353 m	Hyundai - 8G95ME-C9	4.4	A
228	MSC APOLLINE IMO 9896983	23,656 TEU	2021	400 m	Doosan - 9L32/40CD	4.4	A
230	CSCL ARCTIC OCEAN IMO 9695169	19,000 TEU	2015	400 m	Hyundai - 12S90ME-C9	4.5	A
232	HMM NURI IMO 9869162	14,000 TEU	2021	366 m	MAN - 9G95ME-C10	4.5	A
233	ZEAL LUMOS IMO 9864241	15,000 TEU	2021	366 m	Wärtsilä - 10X92	4.5	A
231	MSC NAMIBIA IMO 9974553	8,300 TEU	2025	260 m	Hyundai Heavy Industries Co. Ltd. 7G80ME-C10-coEGR	4.5	A
235	OOCL JAPAN IMO 9776195	21,100 TEU	2017	400 m	Doosan - 11G95ME-C9	4.5	A
234	MSC EDNA IMO 1016680	139,394	2025	335 m	MAN-B&W 6G90ME-C10-GI	4.5	A
238	SAN LORENZO MAERSK IMO 9622227	9,669 TEU	2011	333 m	HHI - 7S90-C9.2	4.5	A
237	MAERSK HUACHO IMO 9848948	15,286 TEU	2019	353 m	Hyundai - 8G95ME-C9	4.5	A
236	MSC LONDON IMO 9606302	16,652 TEU	2014	399 m	STX - 12K98MC-C	4.5	A
239	YM TRUTH IMO 9860910	12,690 TEU	2020	332 m	MAN - 8G95ME-C9	4.5	A
240	MURCIA MAERSK IMO 9780457	20,568 TEU	2015	399 m	Doosan - 7G80ME-C9	4.5	A
242	MANCHESTER MAERSK IMO 9780445	20,568 TEU	2018	399 m	Doosan - 7G80ME-C9	4.5	A
241	MAERSK CANDOR IMO 9924223	15,500 TEU	2022	366 m	MAN - 9G95ME-C10	4.5	A
243	CMA CGM TITAN IMO 9399222	11,400 TEU	2011	363 m	MAN - 12K98ME-C	4.5	A
244	MORTEN MAERSK IMO 9632105	18,270 TEU	2014	399 m	Doosan - 7S80ME-C	4.5	A
250	OOCL GERMANY IMO 9776183	21,100 TEU	2017	400 m	Doosan - 11G95ME-C9	4.5	A
249	ONE MILANO IMO 9757187	13,870 TEU	2018	366 m	Mitsubishi - 11S90ME-C9	4.5	A
248	ZEPHYR LUMOS IMO 9864227	15,000 TEU	2021	366 m	Wärtsilä - 10X92	4.5	A
247	MSC MUGE IMO 9978949	8,000 TEU	2025	335 m	MAN-B&W 6G90ME-C10-GI	4.5	A
246	MSC DARLENE IMO 9930959	15,500 TEU	2023	366 m	MAN - 9G95ME-C10	4.5	A
245	MSC SAMAR IMO 9839442	22,000 TEU	2019	400 m	MAN - 11G95ME	4.5	A

Page 5 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.