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)

#1,871 of 2,380 general cargos

CO₂ intensity

18.2 g CO₂/dwt·nm

vs segment average (13.96)

+30% higher

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
1851	WILSON GIJON IMO 9056038	3,689	1993	88 m	MAN - 6L28/32A	18.0	D
1852	WILSON HOLLA IMO 9229130	4,338	2002	89 m	MAK/Caterpillar - 6M25	18.0	D
1853	AMADEUS AQUAMARIJN IMO 9223423	2,640	2000	88 m	MWM - SBV 6 M 628	18.1	D
1854	MAINTAL IMO 9280677	3,806	2006	88 m	MAK/Caterpillar - 8M20	18.1	D
1855	ERNST HAGEDORN IMO 9137301	2,590	1996	82 m	Deutz - SBV8M628	18.1	D
1856	WILSON SAIMAA IMO 9313694	2,634	2005	80 m	Deutz - SBV6M628	18.1	D
1857	BLUE TUNE IMO 9491927	5,262	2008	90 m	MAN - 6L27/38	18.1	D
1858	WILSON GAETA IMO 9171096	3,894	1998	88 m	MWM - SBV8M628	18.1	D
1859	MERITA IMO 8422034	5,018	1985	99 m	OY WÄRTSILÄ AB 6 R 32	18.1	D
1860	ALESSANDRA LEHMANN IMO 9290684	4,508	2004	90 m	CATERPILLAR MOTOREN GMBH & CO. KG 6 M 25	18.1	D
1861	GULIZAR ANA IMO 9335355	3,300	2005	81 m	Deutz - SBV6M358	18.1	D
1862	TANGO RIO IMO 9205718	9,231	2000	128 m	MAK/Caterpillar - 9M32	18.1	D
1863	KRISTA IMO 9434759	6,980	2008	115 m	MAK/Caterpillar - 8M32C	18.1	D
1864	BBC EAGLE IMO 9407574	10,340	2008	139 m	MAK/Caterpillar - 6 M 43 C	18.1	D
1865	TAGUS RIVER IMO 9368596	6,354	2007	122 m	Wärtsilä - 6R32LN	18.1	D
1866	SEA SPRINTER IMO 9364019	6,355	2007	127 m	MAN - 9L21/31	18.1	D
1867	ARKLOW VENTURE IMO 9772589	5,165	2017	87 m	MAK/Caterpillar - 6M25	18.2	D
1868	HAGLAND CHIEF IMO 9521344	4,450	2012	90 m	MAK/Caterpillar - 6M25	18.2	D
1869	NORDICA HAV IMO 8324684	2,316	1983	82 m	Deutz - SBA8M528	18.2	D
1870	LADY MARY IMO 9375836	3,612	2008	88 m	Wärtsilä - 6L20	18.2	D
1871	CELINE IMO 9508653	5,463	2011	90 m	Zhenjiang Marine - 8L28/32A	18.2	D
1872	SEA LEADER IMO 9363998	6,355	2007	127 m	MAN - 9L21/31	18.2	D
1873	RIX GULF IMO 9396701	5,236	2008	92 m	MAK/Caterpillar - 9M20C	18.2	D
1874	BREB COURAGEOUS IMO 9421178	7,801	2009	108 m	MAK/Caterpillar - MAK 6M32C	18.2	D
1875	PALEISGRACHT IMO 9448346	19,496	2011	169 m	MAN - 7L58/64CD	18.3	D
1876	KARMEL IMO 9290672	4,516	2004	90 m	MAK/Caterpillar - 6M25	18.3	D
1877	HALLAND IMO 9436238	6,805	2008	119 m	MAN - 6L32/40	18.3	D
1878	VASTERBOTTEN IMO 9436226	6,805	2008	119 m	MAN - 6L32/40	18.3	D
1879	SUN BIRD IMO 9415636	4,410	2009	90 m	MAK/Caterpillar - 6M25	18.3	D
1880	UNIWIND IMO 8024155	4,500	1981	93 m	Deutz - SBV6M540	18.3	D
1881	VON ADLER IMO 9184433	4,023	2001	86 m	YANMAR - 6N280-SN	18.3	D
1882	HAPPY ROVER IMO 9139309	15,443	1997	138 m	Wärtsilä - R46	18.3	D
1883	WILSON LOVIISA IMO 9213600	2,620	2005	80 m	Wärtsilä - 8L20	18.3	D
1884	WIDOR IMO 9528483	3,450	2009	82 m	MAK/Caterpillar - 6M25	18.3	D
1885	CALAMAR IMO 9528512	4,030	2011	88 m	MAK/Caterpillar - 6M25	18.3	D
1886	CINDY IMO 9004499	9,597	1992	106 m	Hanshin - 6LF58	18.3	D
1887	C.POLARIS IMO 9356866	3,720	2007	88 m	MAK/Caterpillar - 8M20	18.4	D
1888	PRIMA KING IMO 9195822	4,748	2000	89 m	Wärtsilä - 8M25	18.4	D
1889	KAMELIA IMO 9188958	5,049	1999	95 m	Deutz - TBD645L6	18.4	D
1890	PRIMA VIKING IMO 9195810	4,748	1999	89 m	MAK/Caterpillar - 8M25	18.4	D
1891	VERMLAND IMO 9757084	4,879	2016	87 m	MAK/Caterpillar - 6M25	18.4	D
1892	LUCA IMO 9570632	7,909	2011	130 m	MAK/Caterpillar - 9M25C	18.4	D
1893	SHANNON RIVER IMO 9368572	6,354	2006	122 m	Wärtsilä - 6R32LN	18.4	D
1894	FEED TRONDHEIM IMO 9226798	5,121	2002	100 m	MAK/Caterpillar - MAK 6 M 32	18.4	D
1895	SPANACO FIDELITY IMO 9472024	4,193	2009	90 m	YANMAR - 6EY26	18.4	D
1896	INDUSTRIAL COURAGE IMO 9810329	8,442	2018	100 m	Yichang - 6X35	18.4	D
1897	RIX MARINER IMO 9197387	3,676	2001	88 m	MWM - SBV8M628	18.4	D
1898	LINDE IMO 9141352	4,618	1998	90 m	MWM - TBD645L6	18.4	D
1899	TRIO FIRAT IMO 8914283	4,245	1992	88 m	MAK/Caterpillar - 3606-DITA	18.4	D
1900	MORAIME IMO 9423853	7,126	2008	118 m	MAN - 7L32/40	18.4	D

Page 38 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.