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

Segment rank (2024)

#1,672 of 3,531 bulk carriers

CO₂ intensity

4.5 g CO₂/dwt·nm

vs segment average (4.87)

-8% 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

3,604

vessels ranked

1.42

greenest (g CO₂/t·nm)

4.65

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
1652	HERMES IMO 9613056	75,200	2012	225 m	Hyundai - 5 S 60 MC-C	4.5	C
1651	ALERCE IMO 9942043	37,967	2015	180 m	MAN - 6S46ME-B8	4.5	C
1650	THOR INSUVI IMO 9298533	52,489	2005	190 m	MITSUI ENGINEERING 6S50MC	4.5	C
1649	AL MAQAM IMO 9672040	63,155	2014	200 m	MAN - 5G60ME-C9	4.5	C
1644	YOUNG GLORY IMO 9690133	63,567	2015	206 m	MAN - 6G50ME-B9	4.5	C
1656	REGNO MARINUS IMO 9343467	54,238	2008	210 m	Mitsubishi - 7UEC50LSII	4.5	C
1661	INTREPID IMO 9324629	52,346	2005	190 m	Mitsui - 6S50MC	4.5	C
1660	HIROSHIMA STAR IMO 9770567	81,789	2017	229 m	Mitsui - 6S60ME-C8	4.5	C
1659	THOR COURAGE IMO 9440978	58,693	2009	190 m	Mitsui - 7 S 50 MC-C	4.5	C
1658	JABAL HARIM IMO 9722053	63,277	2016	200 m	DALIAN MARINE - 5S60ME-C8.2 (Tier II)	4.5	C
1657	MIRELA IMO 9730218	58,721	2015	190 m	MAN - 5S60ME-C	4.5	C
1663	TRITON IMO 9642356	75,009	2012	225 m	Hyundai - 5 S 60 MC-C	4.5	C
1662	KRISTINITA IMO 9520936	58,110	2011	190 m	MAN - 7S50MC-C	4.5	C
1664	PANEMORFI IMO 9660097	61,430	2013	200 m	Mitsui - 6S50MC-C8	4.5	C
1667	KOBAYASHI MARU IMO 9847011	60,397	2019	200 m	Mitsui - 6S50ME-B9.3	4.5	C
1666	AMIS BRAVE IMO 9667459	61,467	2013	200 m	MAN - 6S50MC-C8	4.5	C
1665	CLIPPER IRIS IMO 9720964	63,550	2016	200 m	Jiangsu Antai Power Co. Ltd. 5S60ME-C8	4.5	C
1670	NING JING HAI IMO 9751327	63,573	2017	200 m	Hudong Heavy Machinery - 5S60ME-C8	4.5	C
1669	ZH ZHONG XING IMO 9710892	61,122	2014	200 m	MAN - 6S50ME-B9	4.5	C
1671	KYZIKOS IMO 9343845	92,598	2007	230 m	MAN - 7S50MC-C	4.5	C
1668	CEDAR IMO 9403035	58,802	2008	190 m	Mitsui - 6S50MC-C	4.5	C
1673	BELITA IMO 9762857	60,479	2014	200 m	Mitsui - 6G50ME-B9	4.5	C
1672	FANEROMENI IMO 9343857	92,484	2007	230 m	MAN - 7S50MC-C	4.5	C
1674	PIAVIA IMO 9570864	93,296	2011	229 m	Doosan - 6S60MC	4.5	C
1676	HSL MEXICO IMO 9897561	61,167	2020	200 m	MAN - 6S50ME-B9	4.5	C
1675	FENG HE HAI IMO 9747522	63,244	2016	200 m	Hudong Heavy Machinery - 5S60ME-C8	4.5	C
1678	FLORENTIA IMO 9714666	63,340	2016	200 m	Hudong Heavy Machinery - 5G60ME-C9	4.5	C
1677	CL XUCHANG IMO 9943578	61,203	2021	200 m	MAN - 6S50ME-B9.5	4.5	C
1679	JAL MURARI IMO 9849564	81,993	2019	229 m	DALIAN MARINE - 6S60ME-C8	4.5	C
1684	CAGLA IMO 9375953	32,067	2008	179 m	MAN - 6S42MC	4.5	C
1688	SAPPHIRE X IMO 9621132	56,734	2013	190 m	MAN - 6S50MC-C	4.5	C
1683	CL CENTURY IMO 9715816	60,319	2015	198 m	Wärtsilä - 6RT-flex50	4.5	C
1691	GOOD LUCK IMO 9492517	75,031	2011	225 m	Hyundai - 5 S 60 MC-C	4.5	C
1690	SOKO ISLAND IMO 9615169	61,498	2012	200 m	MAN - 6S50MC-C8	4.5	C
1689	SAKIZAYA ORCHID IMO 9811036	81,588	2017	229 m	Mitsui - 6S60ME-C8.2	4.5	C
1682	PANDA IMO 9748277	34,960	2018	180 m	Mitsubishi - 6UEC45LSE-Eco-B2	4.5	C
1687	ATLANTIC ELM IMO 9558244	58,028	2012	190 m	Mitsui - 6S50MC-C	4.5	C
1686	CAPE AKAMAS IMO 9481453	79,454	2010	229 m	HHI - 5S60MC-C8	4.5	C
1681	PLANA IMO 9835769	47,096	2019	190 m	MAN - 5G50ME-C9	4.5	C
1680	APAGEON IMO 9278870	52,483	2005	190 m	Mitsui - 6S50MC	4.5	C
1685	PACIFIC HARMONY IMO 9668271	38,139	2013	180 m	MAN - 6S46MC-C	4.5	C
1700	KERKYRA IMO 9607162	81,375	2012	229 m	Hyundai - 6S60ME-C	4.5	C
1699	OKOLCHITSA IMO 9841653	47,087	2020	190 m	MAN - 5G50ME-C9	4.5	C
1698	SOUTHPORT EAGLE IMO 9575228	63,301	2013	200 m	Doosan - 5S60ME-C8	4.5	C
1697	GHALA IMO 9687069	50,409	2013	183 m	Mitsui - 6S50MC-C	4.5	C
1696	PACIFIC ADVANCE IMO 9712515	63,507	2015	200 m	MAN - 5S60ME-C8	4.5	C
1695	SKATZOURA IMO 9566954	56,795	2011	190 m	Hudong Heavy Machinery - 6S50MC-C	4.5	C
1694	FIRST SKY IMO 9782247	63,452	2017	200 m	MAN - 6S50MC-C8	4.5	C
1693	HORUS IMO 9635690	80,505	2012	229 m	MAN - 7S50MC-C	4.5	C
1692	EVA MASTER IMO 9932139	40,242	2022	180 m	MAN - 5S50ME-C9	4.5	C

Page 34 of 71 — 3,531 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.