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)

#1,142 of 2,221 container ships

CO₂ intensity

8.4 g CO₂/dwt·nm

vs segment average (9.9)

-15% 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
1101	MSC ARCHIMIDIS VIII IMO 9315379	7,943 TEU	2006	318 m	Sulzer - 12RT-flex96C	8.2	C
1102	MSC PAMIRA III IMO 9239903	2,490 TEU	2002	212 m	Sulzer - 7RTA72U-B	8.2	C
1103	MSC MATILDE V IMO 9181663	4,500 TEU	1998	294 m	MAN 9K90MC	8.2	C
1104	MSC POH LIN IMO 9279977	4,862 TEU	2004	294 m	Hyundai - 9 K 90 MC-C	8.2	C
1105	MSC FIAMMETTA IMO 9369758	5,770 TEU	2008	277 m	MAN - 9K98MC	8.2	C
1106	MAERSK MONTE OLIVIA IMO 9283198	4,000 TEU	2003	272 m	Wärtsilä - 8RTA96C	8.2	C
1107	MAERSK GATESHEAD IMO 9235543	4,318 TEU	2002	292 m	Hyundai - 10K90MC-C MK5	8.2	C
1108	AMERICA IMO 9285990	8,468 TEU	2004	334 m	Doosan - 12K98MC-C	8.2	C
1109	EXPRESS SPAIN IMO 9443047	3,459 TEU	2011	223 m	Hyundai - 7RT-FLEX82C	8.2	C
1110	TURKON RIZE IMO 9321471	2,700 TEU	2006	215 m	Hitachi - 7 L70MC-C	8.2	C
1111	MSC ANDRIANA III IMO 9222120	2,550 TEU	2001	210 m	Sulzer - 7RTA72U	8.3	C
1112	MSC HELENA III IMO 9219393	3,091 TEU	2003	220 m	MAN - 7K80MC-C	8.3	C
1113	CMA CGM COLUMBIA IMO 9722663	9,894 TEU	2015	300 m	MAN - 8S90ME-C9	8.3	C
1114	MERKUR HORIZON IMO 9456989	4,300 TEU	2009	262 m	Wärtsilä - 8RTA82C	8.3	C
1115	MSC AZOV IMO 9605255	9,400 TEU	2014	300 m	MAN - 9S90ME-C9	8.3	C
1116	RUBY TOWER IMO 9618276	8,800 TEU	2013	300 m	Hyundai - 9S90ME-C8	8.3	C
1117	MSC SARISKA V IMO 8715857	3,937 TEU	1990	294 m	Mitsui - 12K90MC	8.3	C
1118	MSC YUVIKA V IMO 9141285	4,688 TEU	1997	294 m	Hyundai - 9 K 90 MC-C	8.3	C
1119	SUAPE EXPRESS IMO 9332858	6,350 TEU	2008	293 m	Diesel United - 12RTA96C	8.3	C
1120	MSC SANTHYA IMO 8913411	2,668 TEU	1991	237 m	BREMER VULKAN AG SCHIFFBAU UND MASCHINENFABRIK 7 L 80 MC	8.3	C
1121	MSC SINGAPORE IV IMO 9224348	4,253 TEU	2002	260 m	8K90MC-C	8.3	C
1122	ORCA I IMO 9318113	5,041 TEU	2006	294 m	MAN - 10K98MC-C	8.3	C
1123	CMA CGM MANTA RAY IMO 9322499	5,090 TEU	2007	294 m	Hyundai - 9 K 90 MC-C	8.3	C
1124	BSG BONAIRE IMO 9303766	3,400 TEU	2006	222 m	MAN - 8K80 MC-C	8.3	C
1125	BARCELONA EXPRESS IMO 9626053	3,800 TEU	2014	228 m	Wärtsilä - 7RT-flex82C	8.3	C
1126	CMA CGM BALBOA IMO 9344655	1,819 TEU	2007	186 m	Hyundai - 6 L70MC-C	8.3	C
1127	MSC KYUNGMIN IMO 9967005	1,800 TEU	2025	172 m	MAN - 6S60ME-C10	8.3	C
1128	MSC CLARITA III IMO 9300972	2,800 TEU	2006	213 m	MAN - 8K80 MC-C	8.3	C
1129	CMA CGM MARLIN IMO 9322463	5,090 TEU	2006	294 m	Hyundai - 9 K 90 MC-C	8.4	C
1130	MSC ATHOS IMO 9618317	8,800 TEU	2013	300 m	MAN - 9S90ME-C8	8.4	C
1131	JAKARTA EXPRESS IMO 9539688	4,672 TEU	2012	260 m	CSSC - 8K80ME-C	8.4	C
1132	ISTANBUL BRIDGE IMO 9200811	4,843 TEU	2000	294 m	MAN - 7K98MC	8.4	C
1133	MAERSK TENNESSEE IMO 9314210	4,154 TEU	2007	292 m	Wärtsilä - 8RT-flex96C	8.4	C
1134	SANTA CRUZ IMO 9444742	7,090 TEU	2011	300 m	Doosan - 8RT FLEX 96C	8.4	C
1135	MSC HOUSTON V IMO 9463281	4,432 TEU	2010	267 m	Wärtsilä - 10RT-flex82C	8.4	C
1136	MSC ELOISE IMO 8917778	2,440 TEU	1991	241 m	Sulzer - 6RTA84C	8.4	C
1137	PANDA 009 IMO 9294812	5,527 TEU	2006	276 m	Sulzer - 10RT-flex96C	8.4	C
1138	GSL MERCER IMO 9337274	2,824 TEU	2007	222 m	MAN - 7K80MC-C	8.4	C
1139	AMALTHEA IMO 9397913	4,178 TEU	2009	269 m	Wärtsilä - 7RT-FLEX96C	8.4	C
1140	MAERSK NORFOLK IMO 9356139	2,478 TEU	2008	210 m	Doosan - 7L70ME-C	8.4	C
1141	GENOA EXPRESS IMO 9626041	3,800 TEU	2014	228 m	Wärtsilä - 7RT-flex82C	8.4	C
1142	DURANDE IMO 1025540	24,556	2025	172 m	MAN-B&W 6S60ME-C10	8.4	C
1143	KOBE EXPRESS IMO 9143544	4,612 TEU	1997	294 m	SAMSUNG HEAVY INDUSTRIES CO., LTD. 9 K 90 MC	8.4	C
1144	MAERSK NEWPORT IMO 9356127	2,478 TEU	2005	210 m	Doosan - 7L70ME-C	8.4	C
1145	XIN LIAN YUN GANG IMO 9234355	5,668 TEU	2003	280 m	MAN - 12K90MC-C	8.4	C
1146	OEL SURYA IMO 9320013	2,478 TEU	2006	208 m	MAN - 7L70MC-C	8.4	C
1147	MSC DENMARK VI IMO 9231250	5,762 TEU	2002	277 m	MAN - 12 K 90 MC	8.4	C
1148	SHENZHEN IMO 9461491	8,600 TEU	2011	335 m	Wärtsilä - 12RT-flex96C	8.4	C
1149	FOS EXPRESS IMO 9348699	5,100 TEU	2008	294 m	MAN - 9K90MC-C	8.4	C
1150	MSC TAERIM IMO 9966984	1,800 TEU	2024	172 m	MAN - 6S60ME-C10	8.4	C

Page 23 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.