Most Emission-Efficient Bulk Carriers

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)

#809 of 3,436 bulk carriers

CO₂ intensity

3.6 g CO₂/dwt·nm

vs segment average (4.71)

-24% 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

3,507

vessels ranked

1.74

greenest (g CO₂/t·nm)

4.46

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
802	BUFFALO IMO 9583160	82,177	2012	229 m	Mitsui - 7 S 50 MC-C	3.6	B
799	TAI KNOWLEDGE IMO 9799721	82,008	2017	229 m	Mitsui - 6S60ME-C8	3.6	B
808	HC PIONEER IMO 9442483	83,476	2010	229 m	Kawasaki - 6S60MC-C	3.6	B
804	SCARLET EAGLE IMO 9687693	81,842	2014	229 m	Kawasaki - 6S60MC-C	3.6	B
803	MIGHTY STAR IMO 9860881	81,635	2020	229 m	Mitsui - 6S60ME-C8	3.6	B
807	KATERINA III IMO 9500273	75,700	2011	225 m	MAN - 5S60MC	3.6	B
806	GOOFY IMO 9700782	61,271	2014	200 m	MAN - 6S50MC-C8	3.6	B
805	CONTESSA IMO 9610119	81,383	2013	225 m	Kawasaki - 5S60MC-C7	3.6	B
811	RANGER IMO 9493999	82,172	2012	229 m	Mitsui - 6S50MC-C	3.6	B
810	DESERT PUMA IMO 1018078	63,500	2025	200 m	MAN-B&W 6G50ME-C9	3.6	B
809	PAC ANKAA IMO 9913664	63,103	2021	200 m	MAN - 6S60ME-C8	3.6	B
816	TOMINI TENACITY IMO 9831787	63,583	2020	200 m	MAN - 5S60ME-C8	3.6	B
820	CENTURION IMO 9914371	61,050	2021	200 m	MAN - 6S50ME-B9	3.6	B
813	SOYA TIANJIN IMO 9883754	80,779	2020	229 m	6S60ME-C8.2	3.6	B
819	BULK BOLIVIA IMO 9775139	63,465	2016	200 m	MAN - 6S50MC-C8	3.6	B
818	MFM JAZZ IMO 1065605	63,584	2012	200 m	MAN-B&W 6G50ME-C9	3.6	B
812	SHANDONG XIN RONG IMO 1026582	82,138	2025	229 m	MAN-B&W 6G50ME-C9	3.6	B
815	FJELD SVEA IMO 9626687	81,510	2013	229 m	MAN - 7S50MC-C	3.6	B
814	MYRSINI IMO 9422940	82,117	2010	229 m	Mitsui - 6S60MC-C	3.6	B
817	UM JIANGSU IMO 9982811	66,136	2025	200 m	MAN - 7S50ME-C9	3.6	B
822	BELMAR IMO 9908475	63,641	2021	200 m	MAN - 6S50ME-B9	3.6	B
821	DIAVOLEZZA IMO 9694933	89,772	2013	240 m	Wärtsilä - 6X62	3.6	B
834	ANTONIA S IMO 9591088	81,462	2014	229 m	MAN - 7S50MC-C	3.6	B
833	ST CERGUE IMO 9775373	60,696	2014	198 m	Diesel United - 6RT-flex50	3.6	B
835	MAYE MANX IMO 9931549	63,525	2022	200 m	Mitsui Engineering & Shipbuilding Co. Ltd. 6S50ME-C9-EGRBP	3.6	B
832	NORD NILE IMO 1049261	63,969	2025	200 m	MAN-B&W 6S50ME-C9	3.6	B
823	YU XIAO FENG IMO 9606431	75,397	2012	225 m	MAN - 5S60ME-C	3.6	B
831	CYMONA ENERGY IMO 9638173	74,867	2012	225 m	MAN - 7S50MC-C	3.6	B
830	OCEAN JASMIN IMO 9723203	63,465	2019	200 m	MAN - 5S60ME-C8	3.6	B
829	ZHENG LIN IMO 9323065	82,050	2007	229 m	MAN - 6S60MC	3.6	B
828	JY SHANGHAI IMO 9867152	81,089	2020	229 m	MAN - 6S60ME-C8	3.6	B
827	NIKOLAS D IMO 9474723	80,902	2018	229 m	MAN - 6S60ME-C8	3.6	B
826	GCL ICON IMO 9880245	82,576	2021	229 m	MAN - 6S60ME-C10	3.6	B
825	HONG SHENG IMO 9563627	76,545	2010	225 m	Hudong Heavy Machinery - 5S60MC	3.6	B
824	ELLAN MANX IMO 9931537	63,492	2022	200 m	Mitsui Engineering & Shipbuilding Co. Ltd. 6S50ME-C9-EGRBP	3.6	B
837	PORT NAGASAKI IMO 9965851	64,611	2023	200 m	J-ENG 6UEC50LSH-EcoC3	3.6	B
836	SANTA IRINI IMO 9738789	77,119	2015	225 m	MAN - 6S60MC	3.6	B
841	JABAL ALMISHT IMO 9850769	63,193	2019	200 m	Hudong Heavy Machinery - 5G60ME-C9	3.6	B
844	SM HARMONY1 IMO 9842528	80,895	2020	229 m	MAN - 6S60ME-C	3.6	B
840	INDUS TRIUMPH IMO 9563938	92,967	2006	230 m	STX - 6 S 60 MC-C 7	3.6	B
843	CRETANSEA IMO 9376373	81,508	2009	225 m	MAN - 7S50MC-C	3.6	B
839	BULK PRUDENCE IMO 9713478	61,330	2014	200 m	MAN - 6S50ME-B9	3.6	B
838	GENEVA STAR IMO 9311191	75,843	2009	225 m	MAN - 6S60MC	3.6	B
842	SARA IMO 9837119	80,729	2020	229 m	6S60ME-C10.5	3.6	B
850	SAKIZAYA KALON IMO 9749908	81,691	2014	229 m	Mitsui - 6S60ME-C8	3.6	B
849	HYM ATHENS IMO 9443009	76,636	2008	225 m	Mitsui - 6S60MC	3.6	B
848	MARLA ROYALTY IMO 9985796	64,691	2024	200 m	MAN-B&W 6S50ME-C9	3.6	B
847	OCEAN SCALLION IMO 9592094	82,215	2013	229 m	Dalian 5S60ME-C8	3.6	B
846	PRODIGY IMO 9661106	76,116	2013	225 m	MAN - 5S60ME-C8.2	3.6	B
845	HUAN HANG 99 IMO 9646651	75,390	2018	225 m	Wärtsilä - 5RT-flex58T	3.6	B

Page 17 of 69 — 3,436 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.