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)

#510 of 3,436 bulk carriers

CO₂ intensity

3.3 g CO₂/dwt·nm

vs segment average (4.71)

-31% 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
502	RUBY ETERNITY IMO 9950428	63,807	2023	200 m	MAN - 6S50ME-C9	3.2	A
501	PISTI IMO 9893503	81,737	2021	229 m	Mitsui - 6S60ME-C8	3.2	A
500	LEM MARIGOLD IMO 9845805	64,663	2020	200 m	MAN - 7G50ME-C9	3.2	A
499	COTINGA IMO 9786011	82,061	2019	229 m	DALIAN MARINE - 6S60ME-C8 (Tier II)	3.2	A
496	MEDI ARGENTARIO IMO 9771298	89,499	2018	235 m	Mitsui - 6S60ME-C8.2	3.2	A
507	YM RESPECT IMO 9937218	82,599	2022	229 m	Mitsui Engineering & Shipbuilding C Ltd - Japan 6S60ME-C10-EGRBP	3.2	A
495	W-LUNA IMO 9756925	81,115	2016	229 m	CSSC - 6S60MC-C	3.2	A
494	CL YICHUN IMO 9938793	82,304	2023	229 m	MAN - 6S60ME-C8	3.2	A
508	ROYAL KALEIDO IMO 9851505	80,871	2019	229 m	MAN - 6S60ME-C	3.2	A
511	FLAG MARINA IMO 9384928	106,349	2010	255 m	MAN - 6S60MC	3.3	A
512	SYLVANER IMO 9947275	82,412	2023	229 m	Mitsui E&S DU Co Ltd 6S60ME-C10-EGRBP	3.3	A
510	SSI DISCOVERY IMO 9969144	63,712	2023	200 m	MAN-B&W 6S50ME-C9	3.3	A
515	AGIOS NIKOLAS IMO 9702728	57,902	2014	190 m	MAN - 6S50MC-C	3.3	A
514	SAKIZAYA POWER IMO 9783136	81,938	2017	229 m	Mitsui - 6S60ME-C8	3.3	A
513	MAXWELL IMO 9782027	82,170	2017	229 m	Kawasaki - 6S60MC-C8	3.3	A
516	NORDIC OSHIMA IMO 9687227	76,180	2014	225 m	MAN - 5S60MC-C	3.3	A
518	ORCHID ISLAND IMO 9987251	81,996	2024	229 m	WinGD 6X52	3.3	A
520	TRANS ASIA IMO 9935454	82,278	2022	229 m	CSSC-MES Diesel Co. Ltd. 6S60ME-C10	3.3	A
519	YI PENG5 IMO 9221190	76,099	2001	229 m	Hyundai - 6S60MC	3.3	A
517	GIA GLORY IMO 9877913	84,997	2022	227 m	UnKnown 6S60ME-8-HPSCR	3.3	A
527	TM LUSTROUS IMO 9897925	82,558	2021	229 m	MAN - 6S60ME-C10	3.3	A
526	EVRYDIKI IMO 9448023	114,168	2010	250 m	Hyundai - 6S60MC-C	3.3	A
525	ROLAND OLDENDORFF IMO 9463633	121,448	2007	260 m	Doosan - DOOSAN-MAN 6S60MC-C	3.3	A
524	GOLDEN STAR IMO 9950703	85,000	2021	227 m	China Shipbuilding Industry Co Diesel Engine Co Ltd 6S60ME-C10-HPSCR	3.3	A
523	PETIT LANCY IMO 9999814	82,585	2025	229 m	MAN-B&W 6S60ME-C10	3.3	A
522	GIA INSPIRATION IMO 9948413	85,035	2022	227 m	Dalian Marine Diesel Co Ltd - China 6S60ME-C8-HPSCR	3.3	A
521	YM SPLENDOUR IMO 9959424	82,715	2024	229 m	MAN-B&W 7G50ME-C9	3.3	A
528	TRUSTN TRADER IMO 9937555	82,245	2023	229 m	Yichang - 6S60ME-C8	3.3	A
529	PACIFIC APEX IMO 9916226	63,620	2021	200 m	Hitachi - 6S50ME-B9	3.3	A
536	SDM SHENYANG IMO 9949261	64,317	2023	210 m	MAN-B&W 6G50ME-C9	3.3	A
541	STAR SAPPHIRE IMO 9860037	82,000	2019	229 m	Yuchai Marine Power Co. Ltd. 6S60ME-C8	3.3	A
533	CL YANGJIANG IMO 9977373	64,771	2024	200 m	MAN-B&W 6S50ME-C9	3.3	A
539	AQUAVITA WEALTH IMO 9985784	64,700	2024	200 m	MAN-B&W 6S50ME-C9	3.3	A
538	INDUS VICTORY IMO 9563940	92,870	2006	229 m	STX - STX-MAN 6S60MC-C7	3.3	A
537	ANGLO CYNOSURE IMO 9599133	98,697	2012	240 m	Mitsui - 6S60MC-C	3.3	A
532	SYNTHESEA IMO 9697959	78,020	2015	225 m	MAN - 6S60ME-C8	3.3	A
535	STAR KAMILA IMO 9285043	82,769	2005	229 m	Mitsui - 7 S 50 MC-C	3.3	A
534	ALKIMOS HERACLES IMO 9668881	81,922	2014	229 m	MAN - 7S50MC-C	3.3	A
531	HSL TAMPA IMO 9781035	81,818	2017	229 m	Mitsui - 6S60ME-C8	3.3	A
530	BTG LOGAN IMO 9952517	82,155	2024	229 m	MAN - 6G50ME-C9	3.3	A
540	DIAMOND GLOBE IMO 9828857	82,027	2018	229 m	DALIAN MARINE - 6S60ME-C8	3.3	A
550	CL SPRUCE IMO 1021374	64,181	2025	200 m	MAN-B&W 6S50ME-C9	3.3	A
549	STAR SIRIUS IMO 9520883	98,681	2011	240 m	Mitsui - 7 S 50 MC-C	3.3	A
548	VIBEKE IRIS IMO 9744996	81,886	2016	229 m	Mitsui - 6S60ME-C9	3.3	A
547	MYRTO C IMO 9752383	81,011	2017	229 m	Doosan - 6S60ME-C8	3.3	A
546	SPIRIT OF HO-PING IMO 9433638	82,152	2011	229 m	MAN - 6S60MC-C	3.3	A
545	WEALTH CERES IMO 9469053	87,328	2010	229 m	Hudong Heavy Machinery - 5S60MC-C	3.3	A
544	SUDETY IMO 9582518	82,138	2013	229 m	MAN - 6S60MC-C	3.3	A
543	LOTUS IMO 9518098	82,224	2012	229 m	MAN - 6S60MC-C	3.3	A
542	AEOLIAN SUNRISE IMO 9582544	81,793	2014	229 m	MAN - 6S60MC-C	3.3	A

Page 11 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.