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)

#2,271 of 3,531 bulk carriers

CO₂ intensity

5.2 g CO₂/dwt·nm

vs segment average (4.87)

+7% higher

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
2251	SIENA IMO 9251080	32,744	2002	177 m	Mitsubishi - 6UEC52LA	5.2	D
2252	GULLUK IMO 9228100	50,992	2002	190 m	Kawasaki - 6S50MC-C	5.2	D
2253	LIGNUM MATRIX IMO 9973042	42,540	2023	183 m	MAN - 5S50ME-C9	5.2	D
2254	SEA BREEZE IMO 9869710	40,077	2021	180 m	Yichang - 5S50ME-B9	5.2	D
2255	SC MADISON IMO 9593361	55,831	2012	190 m	Diesel United - 6RT-flex50	5.2	D
2256	PAVIDA NAREE IMO 9649885	35,340	2018	180 m	Doosan - 5S50ME-B9	5.2	D
2257	MAPLE HARBOUR IMO 9593323	55,832	2011	190 m	Diesel United - 6RT-flex50	5.2	D
2258	WEN LI IMO 9265524	56,025	2003	190 m	Mitsui - 6S50MC-C	5.2	D
2259	OCEANIC PRAISE IMO 9687150	37,431	2015	180 m	MAN - 5S50MC-C8	5.2	D
2260	SUPER ARTETA IMO 9594614	56,507	2013	190 m	Doosan - 8S50MC-C	5.2	D
2261	RELIABLE IMO 9762900	38,603	2017	180 m	DALIAN MARINE - 5S50ME-B9	5.2	D
2262	SZARE SZEREGI IMO 9708057	39,000	2017	180 m	DALIAN MARINE - 5S50ME-B9	5.2	D
2263	SIDER MIRAMARE IMO 9865233	39,172	2019	183 m	Mitsui - 6S46ME-B8	5.2	D
2264	WOOYANG CLES IMO 9638147	39,202	2014	180 m	MAN - 5S50ME-B9	5.2	D
2265	FEDERAL SETO IMO 9267209	36,300	2004	200 m	MAN - 6S46MC-C	5.2	D
2266	UNI BLOSSOM IMO 9816567	37,634	2018	180 m	MAN - 6S46MC-C	5.2	D
2267	JINLING CONFIDENCE IMO 9798337	40,320	2017	180 m	Yichang - 5S50ME-B9	5.2	D
2268	TURBO S IMO 9951886	37,738	2023	180 m	MAN-B&W 6S46ME-C8	5.2	D
2269	ERACLE IMO 9499450	58,018	2012	190 m	MAN - 6S50MC-C	5.2	D
2270	NORD ABIDJAN IMO 9866641	39,073	2020	183 m	MAN - 6S50ME-C8	5.2	D
2271	BAYRAKTAR UNITY IMO 9452517	58,609	2010	197 m	Doosan - DOOSAN-MAN B&W 6S50MC-C	5.2	D
2272	BOLD VOYAGER IMO 9565053	56,118	2010	190 m	Mitsui - 6S50MC-C	5.2	D
2273	SOLIDARNOSC IMO 9708069	39,092	2018	180 m	DALIAN MARINE - 5S50ME-B9	5.2	D
2274	TITANAS IMO 9551703	56,896	2012	190 m	Doosan - 6S50MC-C	5.2	D
2275	TOMINI MISTRAL IMO 9754094	39,100	2016	180 m	Yichang - 5S50ME-B9	5.2	D
2276	IRON DUKE IMO 9577422	58,407	2011	196 m	Doosan - 6S50MC-C	5.2	D
2277	LAOURA IMO 9762912	38,552	2017	180 m	Dalian Marine Diesel Works 5S50ME-B9	5.2	D
2278	OWL IMO 9441386	57,809	2011	190 m	MAN - 6S50MC-C	5.2	D
2279	FEDERAL SPEY IMO 9610456	37,141	2012	190 m	Wärtsilä - 6RTA48T	5.2	D
2280	ASTRA CENTAURUS IMO 9611802	58,518	2012	196 m	MAN - 6S60MC-C8	5.2	D
2281	STAR CLEO IMO 9594638	56,582	2013	190 m	MAN - 8S50MC-C	5.2	D
2282	TOMINI SYMPHONY IMO 9718143	63,560	2016	200 m	MAN - 5S60ME-C8	5.2	D
2283	ROMY IMO 9890862	37,897	2020	180 m	Mitsui - 6S46ME-B8	5.2	D
2284	EARTH HARMONY IMO 9832470	36,908	2020	180 m	MAN - 5S50MC-C8	5.2	D
2285	ERRIKOS IMO 9624500	57,000	2014	190 m	MAN - 6S50MC-C	5.2	D
2286	LUNE B IMO 9163491	45,621	1998	186 m	Mitsui - 6S50MC	5.2	D
2287	SIKINOS IMO 9941570	37,400	2022	180 m	MAKITA CORPORATION	5.2	D
2288	SLAVYANKA IMO 9937309	32,209	2023	190 m	Dalian Marine Diesel Works 5G45ME-C9	5.2	D
2289	SFL SARA IMO 9539834	56,869	2011	190 m	Hyundai - 6S50MC-C7.1TII	5.2	D
2290	SPAR LIBRA IMO 9328534	53,565	2006	190 m	Hudong Heavy Machinery - 6S50MC-C	5.2	D
2291	ALDA IMO 9638135	39,202	2014	180 m	MAN - 5S50ME-B9	5.3	D
2292	HUPEH IMO 9714264	39,773	2016	180 m	Wärtsilä - 5RT-flex50	5.3	D
2293	DARLEAKAY IMO 9623647	58,000	2012	190 m	Doosan - 6S60MC-C	5.3	D
2294	SEACON 7 IMO 9487665	56,880	2012	190 m	STX - 6 S 50 MC-C	5.3	D
2295	TONY SMITH IMO 9576569	57,000	2011	190 m	Doosan - 6S50MC-C	5.3	D
2296	BUNUN RESPECT IMO 9890680	37,987	2021	183 m	MAN - 6S46ME-B8	5.3	D
2297	FU XING HAI IMO 9751298	38,800	2016	180 m	Wärtsilä - 5RT-flex50D	5.3	D
2298	MANDARIN NOBLE IMO 9533323	56,692	2012	190 m	STX - 8S50MC-C	5.3	D
2299	XIN HAI TONG 9 IMO 9741578	48,939	2015	190 m	MAN - 6S50MC-C8	5.3	D
2300	SANITA S IMO 9237888	46,683	2004	183 m	Mitsubishi - 6UEC52LS	5.3	D

Page 46 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.