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)

#1,995 of 2,380 general cargos

CO₂ intensity

19.2 g CO₂/dwt·nm

vs segment average (13.96)

+37% 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
1951	BREB TIMBER IMO 9319430	3,817	2005	89 m	MAK/Caterpillar - 8M20	18.8	E
1952	WILSON CADIZ IMO 9192612	4,432	2000	100 m	MWM - TBD645L6	18.8	E
1953	NORVAAG IMO 9135743	4,211	1997	90 m	Deutz - SBV9M628	18.8	E
1954	ALAND IMO 9350783	7,056	2007	117 m	MAK/Caterpillar - MAK 8 M 32 C	18.8	E
1955	LAKER 2 IMO 9447782	6,933	2007	140 m	Wärtsilä - 6L20	18.8	E
1956	HAGLAND CARRIER IMO 9479931	4,400	2011	90 m	MAK/Caterpillar - 6M25	18.8	E
1957	MARAS IMO 9195834	4,950	2000	95 m	Deutz - TBD645L6	18.8	E
1958	LAFJELL IMO 9213997	3,780	2001	90 m	MAK/Caterpillar - 6M20	18.9	E
1959	KERTU IMO 9344368	5,208	2005	101 m	MAK/Caterpillar - 8M25	18.9	E
1960	MANISA GRETA IMO 9391024	8,054	2007	108 m	MAN - 7S26MC	18.9	E
1961	ANKA SKY IMO 9145126	3,526	1997	86 m	MAN - 7 L 28/32 A	18.9	E
1962	WILSON GDANSK IMO 9056026	3,687	1993	88 m	MAN - 6L28/32A	18.9	E
1963	FWN PERFORMER IMO 9770701	10,620	2017	125 m	MAK/Caterpillar - 6M32C	18.9	E
1964	NOUR 1 IMO 8914295	4,245	1991	88 m	MAK/Caterpillar - 3606-DITA	18.9	E
1965	WILSON DAGENHAM IMO 9409613	3,788	2009	88 m	MAK/Caterpillar - 8M20C	18.9	E
1966	BREB COUNTESS IMO 9421166	7,812	2009	108 m	MAK/Caterpillar - MAK 6M32C	18.9	E
1967	GRINNA IMO 9318955	7,136	2004	116 m	MAK/Caterpillar - 8M32C	18.9	E
1968	LIVLAND IMO 9237034	5,464	2001	100 m	MAK/Caterpillar - 9M25	18.9	E
1969	ESPRIT IMO 9479943	4,923	2011	90 m	MAK/Caterpillar - 6M25	18.9	E
1970	LOTTA IMO 9629809	3,850	2013	89 m	MAK/Caterpillar - 8M20	18.9	E
1971	SPANACO SIMPLICITY IMO 9472036	4,188	2009	90 m	YANMAR - 6EY26	18.9	E
1972	EKNOE IMO 9353395	4,300	2006	90 m	MAK/Caterpillar - 6M25	18.9	E
1973	ALSTERDIEP IMO 9472000	4,165	2008	90 m	YANMAR - 6EY26	19.0	E
1974	ANMIRO IMO 9434577	3,695	2009	88 m	MAK/Caterpillar - 8M20	19.0	E
1975	ISLAND STAR IMO 7382500	6,085	1976	104 m	KLEVEN MEK KVM-12	19.0	E
1976	AMADEUS DIAMOND IMO 9201968	2,922	2001	89 m	Wärtsilä - 8L20	19.0	E
1977	WILSON BAERL IMO 9194311	2,895	1999	100 m	MAK/Caterpillar - 6M20	19.0	E
1978	IBRAHIM KARABEKIR IMO 9275854	6,379	2004	95 m	MAK/Caterpillar - 6M32C	19.1	E
1979	NELLI IMO 9360477	4,907	2009	90 m	MAK/Caterpillar - 6M25	19.1	E
1980	TRIPLE S IMO 9662382	5,262	2013	90 m	MAN - 6L27/38	19.1	E
1981	LEMLAND IMO 9415040	8,850	2009	129 m	MAK/Caterpillar - 8M32C	19.1	E
1982	SEELAND IMO 9301603	7,064	2006	117 m	MAK/Caterpillar - MAK 8 M 32 C	19.1	E
1983	FWN PROVIDER IMO 9770713	10,589	2017	125 m	MAK/Caterpillar - 8M25C	19.1	E
1984	ROYAL I IMO 9347633	11,169	2007	128 m	MAK/Caterpillar - 6 M 43 C	19.1	E
1985	LOIRE RIVER IMO 9368584	6,354	2007	122 m	Wärtsilä - 6R32LN	19.1	E
1986	FOKKO UKENA IMO 9375812	3,627	2007	89 m	Wärtsilä - 6L20	19.2	E
1987	FRISIAN INO IMO 9463877	2,570	2012	88 m	ANGLO BELGIAN - 6M20	19.2	E
1988	AMADEUS SILVER IMO 9374909	2,567	2011	88 m	A.B.C. 6MDZC	19.2	E
1989	RIX SPIRIT IMO 9136204	4,084	1996	90 m	MAK/Caterpillar - 6M453C	19.2	E
1990	HAGLAND BOSS IMO 9171058	3,694	1997	88 m	Deutz - SBV8M628	19.2	E
1991	BBC OPAL IMO 9506758	14,360	2011	154 m	Hitachi - 6RT-FLEX50B	19.2	E
1992	RIX LAKE IMO 9109043	3,400	1995	82 m	MAK/Caterpillar - 8M332C	19.2	E
1993	SARAH-B IMO 9119622	2,300	1995	81 m	MAK/Caterpillar - 6M332C	19.2	E
1994	HAPPY STAR IMO 9661259	18,062	2014	156 m	Wärtsilä - 8 L46D	19.2	E
1995	WILSON ELBE IMO 9060675	2,665	1993	82 m	MWM - SBV 6 M 628	19.2	E
1996	FLUVIUS TAVY IMO 9501710	4,200	2009	90 m	MAK/Caterpillar - 8M20C	19.2	E
1997	ELENORA IMO 9184421	4,023	2000	86 m	YANMAR - 6N280-SN	19.2	E
1998	AMISIA IMO 9361378	6,059	2008	111 m	MAK/Caterpillar - 8M25	19.2	E
1999	LELIE C IMO 9166443	3,454	2000	88 m	MAK/Caterpillar - 3516B	19.2	E
2000	THEBE IMO 9199696	2,500	2000	90 m	Deutz - SBV8M628	19.2	E

Page 40 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.