Most Emission-Efficient General Cargos

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)

#958 of 2,380 general cargos

CO₂ intensity

13.1 g CO₂/dwt·nm

vs segment average (13.96)

-6% 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 (DWT)

All sizes < 25,000 DWT 25k – 60k DWT 60k – 100k DWT 100k – 200k DWT > 200,000 DWT

Year

2025 2024

2,429

vessels ranked

3.13

greenest (g CO₂/t·nm)

14.48

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
953	MARATONA IMO 9081344	4,200	1993	90 m	SWEDEN 8V 25	13.1	B
952	ESL AUSTRALIA IMO 9365661	17,356	2007	143 m	Wärtsilä - 8 L 46 B	13.1	B
951	ARISTO IMO 9229116	9,682	2000	132 m	Wärtsilä - 6 L 38	13.1	B
954	MIRA AKAY IMO 9045663	6,916	2004	102 m	MAK/Caterpillar - 6M32	13.1	C
956	PASILA IMO 9113018	13,367	1995	137 m	Wärtsilä - 8R46	13.1	C
955	EKMEN IMO 9136888	6,830	1996	106 m	Mitsui - 5L35MC	13.1	C
957	SOUNDMAR IMO 1031575	5,993	2025	100 m	MAN 6L27/38	13.1	C
959	MISSISSIPPIBORG IMO 9207508	9,732	2000	136 m	Wärtsilä - 8L38	13.1	C
958	UNISOUL IMO 9484209	9,775	2009	132 m	MAK/Caterpillar - 8M32C	13.1	C
960	JSP HALMØ IMO 9968231	5,209	2024	90 m	MaK 6M25E	13.1	C
961	CELINA IMO 9368326	17,299	2008	143 m	Wärtsilä - 8 L 46 B	13.1	C
962	FWN SEA IMO 9721657	10,544	2016	122 m	MAK/Caterpillar - 6M32C	13.1	C
963	MONTSERRAT IMO 9213739	9,567	2000	132 m	MAK/Caterpillar - 6M32	13.1	C
964	HAMMER IMO 9168441	7,200	1998	94 m	Niigata - 6M38GT	13.2	C
966	EKMEN SKY IMO 9384174	8,523	2006	108 m	STX - 7 S 26 MC-MK6	13.2	C
968	NUNALIK IMO 9466996	12,662	2009	138 m	MAK/Caterpillar - 6 M 43 C	13.2	C
965	CONDOR MAGALLANES IMO 9539365	17,954	2011	162 m	MAN - 6S50MC-C	13.2	C
967	LAURUS IMO 9559169	5,480	2009	97 m	Wuxi - G8300ZC	13.2	C
970	SNOW CRYSTAL IMO 9818319	5,790	2017	89 m	Wartsila Finland Oy 6L26	13.2	C
969	MANISA AMELIA IMO 9933456	8,892	2023	120 m	MAK/Caterpillar - 8 M 25E	13.2	C
971	STINNES MISTRAL IMO 9452218	12,946	2010	138 m	MAK/Caterpillar - 6 M 43 C	13.2	C
973	SCHELDEGRACHT IMO 9202510	21,448	2000	172 m	Wärtsilä - 6L64	13.2	C
972	UAL HARRIER IMO 9594303	8,690	2012	110 m	MAK/Caterpillar - 6M32C	13.2	C
974	KWINTEBANK IMO 9234288	9,857	2002	132 m	MAK/Caterpillar - 6R38	13.2	C
975	SITHONIA II IMO 9455571	8,790	2007	112 m	Hanshin - LH46LA	13.2	C
976	UNISKY IMO 9356414	9,775	2006	132 m	MAK/Caterpillar - 8M32	13.2	C
977	ARKLOW MOOR IMO 9509475	14,998	2011	136 m	MAK/Caterpillar - 6 M 43 C	13.3	C
978	VAERMLAND IMO 9196254	3,211	1999	90 m	MAK/Caterpillar - 8M20	13.3	C
979	BBC GANGES IMO 9508304	16,944	2010	143 m	Yichang - 6 S 46 MC-C	13.3	C
980	SPUIGRACHT IMO 9202534	21,448	2001	172 m	Wärtsilä - 6L64	13.3	C
981	BALTIC SEA IMO 9969479	3,700	2024	88 m	Mitsubishi S12R-MPTAW	13.3	C
982	BEATA IMO 9053828	6,918	1994	107 m	MAN - 6S26MC	13.3	C
986	STADIONGRACHT IMO 9202508	21,323	2000	172 m	Wärtsilä - 6L64	13.3	C
985	SLUISGRACHT IMO 9202522	21,448	2001	172 m	Wärtsilä - 6L64	13.3	C
984	GUNERLER IMO 9598684	6,599	2011	109 m	MAK/Caterpillar - 6M25	13.3	C
983	LADA 2005 IMO 8997144	5,300	2005	98 m	Wuxi Antai Power Machinery Co Ltd - China G8300ZC16BH	13.3	C
987	HEEMSKERKGRACHT IMO 9443669	12,672	2009	138 m	MAK/Caterpillar - 6 M 43 C	13.3	C
988	VISSERSBANK IMO 1024663	6,346	2025	107 m	A.B.C. 8DZC	13.3	C
989	BALTIC WAVE IMO 9969508	3,641	2025	88 m	Mitsubishi S12R-MPTAW	13.3	C
990	RIX SAPPHIRE IMO 9195729	3,850	2000	89 m	MAK/Caterpillar - 8M20	13.4	C
991	UAL BRAZIL IMO 9511636	11,078	2010	146 m	MAK/Caterpillar - 9M32C	13.4	C
993	SIDER BILBAO IMO 9338151	14,184	2007	136 m	MAKITA - 7S35MC-MKVII	13.4	C
992	MEHMET AGA IMO 8914312	9,169	1989	131 m	Sulzer - 6ZAL40S	13.4	C
994	KYA IMO 9268837	6,951	2004	111 m	Wärtsilä - 6L26A	13.4	C
997	SLOTERGRACHT IMO 9197947	21,311	2000	168 m	Wärtsilä - 6L64	13.4	C
996	ATLANTICBORG IMO 9466350	17,294	2012	143 m	Wärtsilä - 8 L 46 B	13.4	C
995	STATENGRACHT IMO 9288045	21,253	2004	172 m	Wärtsilä - 6L64	13.4	C
999	MB PINTO IMO 8822636	3,666	1989	88 m	MAK/Caterpillar - 6MU452AK	13.4	C
998	BBC CHALLENGER IMO 9369095	11,121	2008	146 m	MAK/Caterpillar - 9M32C	13.4	C
1000	FINN III IMO 9534456	10,000	2011	116 m	MAK/Caterpillar - 8M32C	13.4	C

Page 20 of 48 — 2,380 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.