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)

#500 of 2,380 general cargos

CO₂ intensity

8.5 g CO₂/dwt·nm

vs segment average (13.96)

-39% 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
451	STAR HUANGSHAN IMO 9438365	34,022	2010	183 m	MAN - 6S50MC-C	7.7	A
452	DA XIANG IMO 9768552	28,577	2017	180 m	Hudong Heavy Machinery - 6RT-flex50	7.8	A
453	PACIFIC VICTOR IMO 9458456	28,309	2014	166 m	STX - 6S40ME-B9	7.8	A
454	DA QING IMO 9768540	28,604	2017	180 m	Hudong Heavy Machinery - 6RT-flex50	7.8	A
455	MANTA HACER IMO 9303429	32,316	2004	173 m	Hitachi - 6S46MC-C	7.8	A
456	KAPADOKYA IMO 9268083	31,646	2003	172 m	Akasaka - 6UEC52LA	7.8	A
457	PRINCE HADI IMO 9125217	26,412	1997	169 m	5L50MC	7.9	A
459	SIMAG SHANGHAI IMO 9695119	27,263	2014	180 m	DALIAN MARINE - 6S50MC-C8	7.9	A
458	BERKAY N IMO 9524827	12,046	2008	105 m	Hanshin - LH46LA	7.9	A
461	ATLANTIC RUNNER II IMO 9509619	33,150	2010	179 m	STX - 6S50MC-C7	7.9	A
460	SPANACO STAR IMO 9071557	32,744	1994	198 m	Mitsui Engineering & Shipbuilding C Ltd - Japan 6S60MC	7.9	A
462	MISJE VIOLA IMO 9927445	5,310	2023	90 m	Wartsila 8L20	7.9	A
463	MU DAN SONG IMO 9608831	27,410	2012	180 m	MAN - 6S50ME-C8	7.9	A
464	AAL GENOA IMO 9393553	25,733	2010	160 m	MAN - 6S40ME-B9	7.9	A
466	AGIA DOXA IMO 9467976	33,261	2010	179 m	STX - 6 S 50 MC-C	7.9	A
465	TRANSNORDIC IMO 9602174	34,827	2012	180 m	MAN - 5S50MC-C	7.9	A
467	OCEAN SKY IMO 9354064	18,951	2006	139 m	MAN - 7 S 35 MC	8.0	A
468	TRANSARCTIC IMO 9674921	26,052	2013	174 m	MAN - 6L48/60B	8.0	A
469	SERVET ANA IMO 9443774	30,124	2011	179 m	MAKITA - MAKITA-MITSUI-MAN B&W 6S42MC	8.0	A
470	GEM STAR IMO 9496173	33,171	2011	177 m	Mitsubishi - 6UEC45LSE	8.0	A
471	MUAZZEZ K IMO 9758961	12,549	2016	136 m	MAK/Caterpillar - 6M32C	8.0	A
472	CHIPOLBROK STAR IMO 9432127	30,346	2010	200 m	Wärtsilä - 7RT-flex60C	8.1	A
473	SERGEY BODROV IMO 9458432	28,309	2012	166 m	STX - 6S40ME-B9	8.1	A
474	AFRICAN WIND IMO 9423633	28,450	2010	166 m	STX - 6S40ME-B	8.1	A
476	LADY SACHA IMO 9299460	27,638	2004	185 m	Hudong Heavy Machinery - 6S46MC-C	8.1	A
475	BC RAEDA IMO 9487598	24,959	2011	158 m	Hanshin - 7S35MC	8.1	A
477	AAL SINGAPORE IMO 9498365	32,134	2011	194 m	Wärtsilä - 7RT-flex50-B	8.1	B
478	ARTAX IMO 9623063	37,072	2014	178 m	Mitsubishi - 6UEC45LSE	8.1	B
479	AAL GALVESTON IMO 9393577	25,774	2010	160 m	STX - 6S40ME-B	8.1	B
481	TONAL IMO 9576129	7,852	2010	120 m	GUANGZHOU DIESEL ENGINE FACTORY 8320ZCD-8	8.2	B
480	MGD JOY IMO 9427586	26,307	2011	157 m	MAN - 6S42MC	8.2	B
482	NC CAPTAIN IMO 9335707	6,867	2004	112 m	Guangzhou Diesel Engine Factory Co Ltd - China 8320ZCD-6	8.2	B
483	ALEXIA IMO 9997282	14,404	2024	150 m	Wartsila 6L32	8.2	B
484	INVENTANA IMO 9186223	44,982	2000	198 m	6S60MC	8.3	B
485	MISJE VITA IMO 9927421	5,310	2022	90 m	Wärtsilä - 8L20	8.3	B
486	MAXIMA IMO 9882061	14,345	2021	150 m	MAK/Caterpillar - 6M32C	8.3	B
487	COMPADRE IMO 9506100	23,003	2009	160 m	MAN - 9L32/40	8.3	B
489	DA JI IMO 9768538	28,612	2016	180 m	—	8.4	B
488	SIDER LUCK IMO 9495595	26,307	2012	157 m	Mitsui - 6S42MC	8.4	B
491	QIAN KUN IMO 9432165	30,280	2011	200 m	Hyundai - 7RT-flex60C	8.4	B
490	MISJE LILY IMO 1049730	5,309	2025	90 m	Wartsila 8L20	8.4	B
492	VAFAA M IMO 9162409	25,008	1997	160 m	MITSUI ENGINEERING 6S42MC	8.4	B
493	YASMINA IMO 9177765	13,347	1998	128 m	MAKITA - 6S35MC	8.4	B
494	TRANSAMERICA IMO 9486257	26,391	2010	157 m	MAN - 7 S 35 MC	8.5	B
497	CHIPOLBROK PACIFIC IMO 9710177	31,615	2015	190 m	—	8.5	B
496	VERTOM WILLEMIJN IMO 9993286	7,306	2025	119 m	Volvo Penta D13MG	8.5	B
495	SKYHIGH SW IMO 9606663	14,260	2011	128 m	MAN - 6S35MC	8.5	B
499	DA GUI IMO 9768564	28,606	2017	180 m	Hudong Heavy Machinery - 6RT-flex50	8.5	B
498	ADAMAR IMO 9515280	17,660	2009	148 m	Hyundai - 7L58/64	8.5	B
500	GUANA IMO 9180956	18,965	1999	150 m	MAN - 7 S 35 MC	8.5	B

Page 10 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.