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)

#2,527 of 3,436 bulk carriers

CO₂ intensity

5.5 g CO₂/dwt·nm

vs segment average (4.71)

+16% 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

3,507

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
2501	ABU AL ABYAD IMO 9494022	57,369	2011	190 m	MAN - 6S50MC-C	5.4	D
2502	AFRICAN HARRIER IMO 9700794	37,800	2014	180 m	MAKITA - 6S46ME-B8.3	5.4	D
2503	FEDERAL SPEY IMO 9610456	37,141	2012	190 m	Wärtsilä - 6RTA48T	5.4	D
2504	LACTA IMO 9502362	58,713	2010	197 m	MAN - 6S50MC-C	5.4	D
2505	WHITE FIN IMO 9607291	56,780	2011	190 m	STX - 6S50MC-C8	5.4	D
2506	FEDERAL BRISTOL IMO 9697844	34,564	2015	200 m	MAN - 6S46MC-C	5.5	D
2507	TIZIANA IMO 9744764	35,443	2016	177 m	MAN - 6S50ME-B8	5.5	D
2508	KIRANA NAREE IMO 9434723	56,823	2011	190 m	STX - 6 S 50 MC-C	5.5	D
2509	BUNUN LEADER IMO 9860609	37,650	2019	180 m	MAN - 6S50ME-C8	5.5	D
2510	FEDERAL SETO IMO 9267209	36,300	2004	200 m	MAN - 6S46MC-C	5.5	D
2511	JULIA IMO 9820702	37,449	2018	180 m	MAN - 5S50MC-C8	5.5	D
2512	SEAGUARDIAN IMO 9174268	75,462	1999	225 m	Hitachi - 6S60MC	5.5	D
2513	PEGASUS IMO 9755842	34,958	2018	180 m	Mitsubishi - 6UEC45LSE-Eco-B2	5.5	D
2514	KALLONE IMO 9370006	55,840	2007	190 m	Kawasaki - 6S50MC-C-MKVII	5.5	D
2515	SPAR LIBRA IMO 9328534	53,565	2006	190 m	Hudong Heavy Machinery - 6S50MC-C	5.5	D
2516	INTERLINK SOLIDITY IMO 9711779	40,098	2017	180 m	Yichang - 5S50ME-B9.3 (Tier II)	5.5	D
2517	DUBAI CROWN IMO 9326378	55,338	2005	190 m	Kawasaki - 6S50MC-C	5.5	D
2518	NORSE ZEALAND IMO 1033523	39,545	2025	180 m	MAN-B&W 6G45ME-C9	5.5	D
2519	DESERT OASIS IMO 9543782	57,436	2012	193 m	HHI - 7S50MC-C8	5.5	D
2520	CORAL ISLAND IMO 9304112	55,699	2006	190 m	MAN - 6S50MC-C	5.5	D
2521	R SKYWALKER IMO 9610248	36,332	2013	176 m	Mitsui - 5S50MC-C	5.5	D
2522	TOMINI PAMPERO IMO 9714771	38,635	2015	180 m	Wärtsilä - 6RTA48TD-1 (Tier II)	5.5	D
2523	LAOURA IMO 9762912	38,552	2017	180 m	Dalian Marine Diesel Works 5S50ME-B9	5.5	D
2524	BREEZE IMO 9455650	56,686	2009	190 m	MAN - 6S50MC-C	5.5	D
2525	PRIMUS IMO 9310757	32,588	2006	177 m	Mitsubishi - 6UEC52LA	5.5	D
2526	NORD RIO IMO 9911977	39,956	2022	183 m	Mitsui Engineering & Shipbuilding Co. Ltd. 6S46ME-B8-HPSCR	5.5	D
2527	ROSSANA IMO 9696838	39,935	2016	180 m	Doosan - 5RT-flex50	5.5	D
2528	CRYSTAL CONFIDENCE IMO 9728382	34,874	2016	180 m	Mitsubishi - 6UEC45LSE	5.5	D
2529	BAR IMO 9693496	36,048	2014	180 m	Yichang - 5S50ME-B9	5.5	D
2530	ALICIA IMO 9663623	63,351	2012	200 m	Doosan - 5S60ME-C8	5.5	D
2531	CHIOS FREEDOM IMO 9680255	36,612	2015	180 m	MAN - 5S50ME-B9	5.5	D
2532	ECE NUR BAYRAKTAR IMO 9480473	58,449	2007	196 m	Doosan - 6S50MC-C	5.5	D
2533	TCZEW IMO 9727493	39,000	2017	180 m	DALIAN MARINE - S50ME-B9	5.5	D
2534	S-BREEZE IMO 9317145	52,454	2006	190 m	Mitsui - 6S50MC	5.5	D
2535	RELIABLE IMO 9762900	38,603	2017	180 m	DALIAN MARINE - 5S50ME-B9	5.5	D
2536	AL DANAH IMO 9614103	54,683	2011	190 m	STX - 6 S 50 MC-C	5.5	D
2537	FENG MAO HAI IMO 9747510	63,413	2017	200 m	Hudong Heavy Machinery - 5S60ME-C8	5.5	D
2538	KIRAN ANATOLIA IMO 9650171	63,478	2013	200 m	MAN - 5S60ME-C8	5.5	D
2539	NORD BREMEN IMO 9979228	40,101	2024	183 m	MAKITA CORPORATION	5.5	D
2540	RESOLUTE BAY IMO 9626314	36,798	2012	186 m	MAN - 6S46MC-C	5.5	D
2541	TOMINI SOLANO IMO 9711731	38,835	2016	190 m	Wärtsilä - 6RTA48TD-1 Tier II compliant	5.5	D
2542	JNS OCEAN IMO 1044508	40,495	2024	180 m	MAN-B&W 5S50ME-C9	5.5	D
2543	FAUN IMO 9748239	63,592	2015	200 m	MAN - 5S60ME-C8	5.5	D
2544	INCE EGE IMO 9436733	57,373	2010	190 m	STX - 6 S 50 MC-C	5.5	D
2545	MDS SOFIA IMO 9609689	37,405	2012	187 m	Hyundai - 6S46MC-C	5.5	D
2546	ALDA IMO 9638135	39,202	2014	180 m	MAN - 5S50ME-B9	5.5	D
2547	RANA IMO 9693290	39,915	2015	180 m	Wärtsilä - 5RT-flex50	5.5	D
2548	HOIHOW IMO 9714238	39,721	2016	180 m	Wärtsilä - 5RT-flex50	5.5	D
2549	ANNA-META IMO 9514406	56,280	2010	190 m	MAN - 6S50MC-C	5.5	D
2550	TOMINI MISTRAL IMO 9754094	39,100	2016	180 m	Yichang - 5S50ME-B9	5.5	D

Page 51 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.