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)

#1,050 of 2,380 general cargos

CO₂ intensity

13.7 g CO₂/dwt·nm

vs segment average (13.96)

-2% 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
1001	KARSOY IMO 9555618	11,259	2009	133 m	WARTSILA FINLAND OY 8l-32	13.4	C
1000	VERTOM JOY IMO 9706865	11,000	2023	128 m	Wartsila 8L20	13.4	C
1004	VERTOM RIAN IMO 9980095	5,735	2025	99 m	Volvo Penta D13B-E	13.4	C
1003	UAL OSPREY IMO 9594315	8,690	2012	110 m	MAK/Caterpillar - 6M32C	13.4	C
1005	KEREM KARABEKIR IMO 9452127	5,110	2007	102 m	YANMAR - 6N330	13.4	C
1006	PERFECT IMO 9371854	6,509	2009	118 m	MAK/Caterpillar - 6L26	13.4	C
1008	UNDEN IMO 9961910	5,048	2024	87 m	A.B.C. 8DZC	13.4	C
1007	ALANIS IMO 9468085	12,653	2010	138 m	MAK/Caterpillar - 8 M 43 C	13.4	C
1009	BBC NYHAVN IMO 9559896	9,737	2012	132 m	ROLLS-ROYCE MARINE AS, ENGINES DPT BERGEN B32:40L8P	13.4	C
1010	HAPPY DELTA IMO 9551935	18,276	2011	157 m	Wärtsilä - 8L46	13.5	C
1012	ELISA K. IMO 9879064	5,151	2021	87 m	MAK/Caterpillar - 6M25C	13.5	C
1011	HAV PIKE IMO 9106912	3,736	1994	88 m	Deutz - SBV8M628	13.5	C
1013	C.EPSILON IMO 9130212	4,211	1997	90 m	MWM - SBV9M628	13.5	C
1014	EMMA IMO 9285433	5,745	2004	105 m	MAK/Caterpillar - 6M25	13.5	C
1015	NOREN IMO 9968255	5,211	2024	90 m	MAN 6L27/38	13.5	C
1017	FAST OLIVIA IMO 1029065	3,850	2026	89 m	—	13.5	C
1016	BAYMAR IMO 1031551	5,991	2024	100 m	MAN 6L27/38	13.5	C
1020	LOA FORTUNE IMO 9526265	24,322	2014	175 m	MAN - 7S50ME-C8	13.5	C
1019	PELAGICA IMO 9453781	12,710	2010	138 m	MAK/Caterpillar - 6 M 43 C	13.5	C
1018	BBA LARISA IMO 9166510	4,600	1999	94 m	MAK/Caterpillar - 6M32	13.5	C
1023	KATHY C IMO 9523940	6,799	2010	106 m	MAK/Caterpillar - 6M25C	13.5	C
1022	SVEN IMO 9953949	3,808	2023	90 m	A.B.C. 6DZC	13.5	C
1024	FREYJA W IMO 9754422	12,245	2018	138 m	Yichang - 6S40ME-B9	13.5	C
1021	FIONA IMO 9381419	8,109	2009	108 m	MAN - 7S26MC	13.5	C
1026	JAN D IMO 9969510	3,625	2025	85 m	Mitsubishi S12R-MPTAW	13.5	C
1025	FATIH IMO 9381421	8,591	2009	108 m	MAN - 7S26MC	13.5	C
1027	TRANSBAY IMO 9187033	17,539	1999	143 m	Wärtsilä - 8 L 46 B	13.6	C
1028	VAASABORG IMO 9196242	9,567	2000	132 m	Wärtsilä - 6R38	13.6	C
1029	SPIEGELGRACHT IMO 9197911	21,311	2000	168 m	Wärtsilä - 6L64	13.6	C
1030	MADDOX IMO 8908844	16,883	1995	149 m	H. CEGIELSKI 4S50MC	13.6	C
1032	BORE WIND IMO 9892901	6,792	2022	122 m	Wärtsilä - 8L34DF	13.6	C
1031	BBC MANILA IMO 9811995	12,325	2022	147 m	MAN - 6S40ME-B9	13.6	C
1033	UAL COLOGNE IMO 9681534	8,736	2014	127 m	MAK/Caterpillar - 6M32C	13.6	C
1035	GOLDEN ROSE IMO 8801620	9,594	1989	113 m	Hanshin - 6LF58	13.6	C
1034	ELISABETH K IMO 9879052	5,160	2021	87 m	MAK/Caterpillar - 6M25C	13.6	C
1036	BBC SEINE IMO 9508380	16,968	2010	143 m	Yichang - 6 S 46 MC-C	13.6	C
1038	SLETRINGEN IMO 9911927	8,534	2021	120 m	MAK/Caterpillar - 8 M 25E	13.6	C
1037	C. RIGEL IMO 9199139	3,687	2003	88 m	Deutz - SBV8M628	13.6	C
1039	CPT. AHMAD II IMO 9031430	4,258	1991	88 m	MAK/Caterpillar - 8 M 332	13.6	C
1041	SKY FEYZ IMO 9116034	3,662	1995	88 m	KROMHOUT MOTOREN FABRIEK N.V. 8 FHD 240-G	13.6	C
1040	SAVA IMO 9158082	8,300	1999	121 m	MAK/Caterpillar - 8M32	13.6	C
1043	HEERENGRACHT IMO 9435753	12,678	2009	138 m	MAK/Caterpillar - 6M43	13.6	C
1042	UNISCOUT IMO 9484194	9,813	2009	132 m	MAK/Caterpillar - MAK 8 M 32 C	13.6	C
1047	LADY LAURA IMO 9321108	11,534	2006	146 m	MAK/Caterpillar - 9M32	13.6	C
1046	POTENTIA IMO 9431472	12,767	2009	139 m	MAK/Caterpillar - 6M43	13.6	C
1045	KENAN ATASOY IMO 9215658	7,116	2000	112 m	Wärtsilä - 8R32E	13.6	C
1044	NORDIC KYLIE IMO 9357999	12,791	2005	138 m	MAK/Caterpillar - 6M43	13.6	C
1049	FEED RANA IMO 9291705	4,933	2004	90 m	MAK/Caterpillar - 6M25	13.7	C
1048	BMI EMPEROR IMO 9310331	6,139	2005	113 m	MAK/Caterpillar - 6M32C	13.7	C
1050	RAMUS IMO 9318400	6,063	2005	100 m	Guangzhou Diesel 8320ZCD-6	13.7	C

Page 21 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.