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 2024. Lower is greener. Pick a segment and size class to see the greenest vessels first.

Segment rank (2024)

#490 of 1,190 general cargos

CO₂ intensity

9.2 g CO₂/dwt·nm

vs segment average (10.91)

-16% 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

1,215

vessels ranked

3.23

greenest (g CO₂/t·nm)

11.21

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
451	DA JI IMO 9768538	28,612	2016	180 m	—	8.7	B
452	PUFFIN S IMO 9164811	20,738	1999	157 m	Hitachi - 6S42MC	8.7	B
453	LADY JAMILA IMO 9316983	33,427	2007	180 m	Mitsubishi - 5UEC52LA	8.7	B
454	GREY FOX IMO 9594470	33,290	2011	179 m	MAN - 6S50MC-C	8.7	B
455	IRMA S IMO 9385063	32,295	2008	177 m	Mitsubishi - 6UEC52LA	8.7	B
456	STELLINA IMO 9674933	26,051	2014	174 m	MAN - 6L48/60B	8.8	B
459	ANGELINA IMO 9168154	29,519	1997	181 m	DALIAN MARINE - 5S50MC	8.8	B
458	AAL GUNSAN IMO 9393589	25,747	2010	160 m	STX - 6S40ME-B	8.8	B
457	MAXIMA IMO 9882061	14,345	2021	150 m	MAK/Caterpillar - 6M32C	8.8	B
460	SIDER MOMPOX IMO 9656553	14,703	2014	139 m	DAHAITSU DIESEL MFG. CO.,LTD 6DKM-36	8.8	B
462	BERKAY N IMO 9524827	12,046	2008	105 m	Hanshin - LH46LA	8.8	B
461	AAL KOBE IMO 9498444	32,043	2012	194 m	Wärtsilä - 7RT-flex50-B	8.8	B
463	AAL KEMBLA IMO 9498353	31,000	2011	194 m	Wärtsilä - 7RT-flex50-B	8.8	B
464	LILAC ROLLER IMO 9509712	33,200	2011	179 m	STX - 6S50MC-C7	8.8	B
466	XIA MEN ZE AN IMO 9638628	27,263	2013	180 m	STX - 6S50MC-C8	8.8	B
465	LADY AYSE IMO 9227871	16,239	2001	137 m	Akasaka - MITSUBISHI 6 UEC 37 LSII	8.8	B
467	QI LIN SONG IMO 9416771	27,307	2010	180 m	Mitsubishi - 6UEC50LSII	8.9	B
468	CENGIZ AMCA IMO 9616096	11,051	2013	132 m	Wärtsilä - 6L32	8.9	B
469	AAL PUSAN IMO 9498389	32,279	2012	194 m	Wärtsilä - 7RT-flex50-B	8.9	B
470	LAKE ST. CLAIR IMO 9315549	27,740	2005	185 m	Hudong Heavy Machinery - 6S46MC-C	8.9	B
471	UMS-ARCTURUS IMO 9164794	20,731	1998	160 m	Hitachi - 6S42MC	8.9	B
473	TRANSARCTIC IMO 9674921	26,052	2013	174 m	MAN - 6L48/60B	8.9	B
472	CHIPOLBROK PACIFIC IMO 9710177	31,615	2015	190 m	—	8.9	B
475	HAJE HALIMEH IMO 8214889	13,286	1983	130 m	Mitsubishi - 7UEC37/88H	8.9	B
474	TRANSOCEAN IMO 9644251	22,983	2012	160 m	MAN - 7S35MC-5	8.9	B
476	SANTORINI IMO 9181493	24,460	1998	158 m	Mitsui - 6L42MC	9.0	B
477	MOHAMAD Y IMO 8107000	11,990	1982	138 m	Stork Werkspoor 9TM410	9.0	C
478	AAL GENOA IMO 9393553	25,733	2010	160 m	MAN - 6S40ME-B9	9.0	C
480	HAYRIYE ANA IMO 9557953	8,383	2009	118 m	Daihatsu - 8DKM-28	9.0	C
479	NAGUAL IMO 9380829	37,277	2008	178 m	Akasaka - 6UE52LA	9.0	C
481	MUAZZEZ K IMO 9758961	12,549	2016	136 m	MAK/Caterpillar - 6M32C	9.0	C
482	AAL MELBOURNE IMO 9498456	32,128	2013	194 m	Wärtsilä - 7RT-flex50	9.0	C
483	BOHWA AMOY IMO 9300958	10,084	2005	101 m	MAKITA - 5L35MC-MKVI	9.0	C
484	LADY SACHA IMO 9299460	27,638	2004	185 m	Hudong Heavy Machinery - 6S46MC-C	9.0	C
485	CORNELIA IMO 9216597	24,765	2001	175 m	6L50MC	9.1	C
486	BEATRIX IMO 9419280	14,603	2009	155 m	Wärtsilä - 9L32C	9.1	C
487	MATSUMAE IMO 9401336	13,801	2007	125 m	MAN - 7L35MC	9.1	C
489	MEKELE IMO 9617416	28,066	2013	166 m	STX - STX-MAN 6S40ME-B9	9.2	C
488	BULKER BEE 11 IMO 9507075	13,625	2011	135 m	MAN - 6S35MC	9.2	C
490	ARKLOW WIND IMO 9818943	16,861	2019	150 m	MAK/Caterpillar - 8M32C	9.2	C
491	LADY MERAL IMO 9311311	32,131	2005	172 m	Mitsubishi - 6UEC52LA	9.2	C
492	ULUSOY-8 IMO 9458250	22,303	2008	160 m	MAN - 7 S 35 MC	9.2	C
494	LIAN HUA SONG IMO 9608829	27,412	2011	180 m	MAN - 6S50ME-C8	9.2	C
495	PACIFIC VICTOR IMO 9458456	28,309	2014	166 m	STX - 6S40ME-B9	9.2	C
493	LAKE ONTARIO IMO 9283538	27,783	2004	185 m	Hudong Heavy Machinery - 6S46MC-C	9.2	C
496	LAKE ERIE IMO 9283540	27,781	2004	185 m	Hudong Heavy Machinery - 6S46MC-C	9.3	C
497	BASEL ATHENA IMO 9164809	20,741	1999	158 m	Hitachi - 6S42MC	9.3	C
498	ATLANTIC SPIRIT II IMO 9594509	33,200	2012	179 m	MAN - 6S50MC-C	9.3	C
500	FISHER IMO 9177791	12,974	1999	128 m	MAKITA - 6S35MC	9.3	C
499	BAHAR-K IMO 8884555	8,284	1993	121 m	SKL - 6VDS48/42AL-2	9.3	C

Page 10 of 24 — 1,190 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 2024 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.