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)

#1,897 of 3,531 bulk carriers

CO₂ intensity

4.8 g CO₂/dwt·nm

vs segment average (4.87)

-2% 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
1851	WADI ALYARMOUK IMO 9460772	80,384	2010	229 m	MAN - 7S50MC-C	4.7	C
1852	AROMO IMO 9883144	37,927	2020	180 m	MAKITA - 6S50ME-C8	4.7	C
1853	ARIS T IMO 9343895	92,524	2007	230 m	STX - 7 S 50 MC-C	4.7	C
1854	BUBBA BOOSH IMO 9674218	55,464	2014	190 m	MAN - 6S50ME-B8	4.7	C
1855	SEA STAR 74 IMO 9109378	46,638	1995	189 m	MITSUI ENGINEERING 6S50MC	4.7	C
1856	BLACK PEARL IMO 9579743	79,600	2012	229 m	MAN - 7S50MC-C	4.7	C
1857	EVA SUNRISE IMO 9932141	40,281	2022	180 m	MAN - 5S50ME-C9	4.7	C
1858	ELEOUSSA IMO 9323900	56,678	2008	190 m	Sulzer - 6RT-flex50	4.7	C
1859	FEDERAL LYRA IMO 9668063	55,725	2014	190 m	Mitsui - 6S50ME-B9	4.7	C
1860	CELESTIAL BLUE IMO 9885439	61,197	2020	200 m	MAN - 6S50ME-B9	4.7	C
1861	BULK FRIENDSHIP IMO 9496977	58,738	2011	197 m	MAN - 6S50MC-C	4.7	C
1862	BUNUN YOUTH IMO 9959319	39,703	2023	180 m	UnKnown 6G45ME-C9-HPSCR	4.7	C
1863	PACIFIC FRIEDA IMO 9274939	52,498	2005	190 m	Mitsui - 6S50MC	4.7	C
1864	ORIOLE IMO 9441374	57,809	2011	190 m	Yichang - 6S50MC-C	4.7	C
1865	CK BLUEBELL IMO 9595876	80,961	2011	229 m	MAN - 6S60MC-C	4.7	C
1866	FEDERAL FRASER IMO 9866744	34,492	2021	200 m	Kawasaki Heavy Industries Ltd. 5S50ME-C9.7	4.7	C
1867	BIWA ARROW IMO 9687095	55,978	2014	190 m	MAN - 5S60MC-C	4.7	C
1868	ASL IXORA IMO 9448229	61,470	2012	200 m	MAN - 6S50MC-C8	4.7	C
1869	FAUN IMO 9748239	63,592	2015	200 m	MAN - 5S60ME-C8	4.7	C
1870	TRAMP LADY IMO 9286621	76,294	2005	225 m	MITSUI ENGINEERING 6S60MC	4.7	C
1871	BERN IMO 9276171	76,878	2004	225 m	MAN - 5S60MC-C	4.7	C
1872	SHENG HENG HAI IMO 9505493	56,649	2013	190 m	MAN - 6S50MC-C8	4.7	C
1873	ASTRA N IMO 9476290	55,762	2010	190 m	Wärtsilä - 6RT-flex50	4.7	C
1874	JPS AFRODITI IMO 9763980	57,523	2016	190 m	Mitsui - 7S50ME-B9	4.7	C
1875	GREENER IMO 9618616	56,621	2013	190 m	MAN - 6S50MC-C	4.7	C
1876	CURIA IMO 9710048	57,559	2015	190 m	MAN - 7S50ME-B9	4.7	C
1877	SEADUTY IMO 9392432	82,449	2008	229 m	Mitsui - 7 S 50 MC-C	4.7	C
1878	BBG LEADER IMO 9704843	63,241	2015	200 m	MAN - 5G60ME-C9	4.7	C
1879	OCEAN DESTINY IMO 9485045	55,848	2011	190 m	Diesel United - 6RT-flex50	4.7	C
1880	BUNUN JUSTICE IMO 9732448	37,748	2017	180 m	MAKITA - 6S50ME-C	4.7	C
1881	NORDIC BC KIEL IMO 9478573	55,947	2010	190 m	Wärtsilä - 6RT-flex50	4.7	C
1882	SHUN FU WANG IMO 9244788	75,966	2002	225 m	Mitsui - 6S60MC	4.7	C
1883	IVS ATSUGI IMO 9838527	62,661	2020	200 m	UnKnown MAN B/W	4.7	C
1884	JNS RIVER IMO 1045227	40,503	2024	180 m	MAN-B&W 5S50ME-C9	4.7	C
1885	ORNAK IMO 9452610	79,677	2010	229 m	MAN - 7S50MC-C	4.7	C
1886	BULK GUATEMALA IMO 9642227	61,446	2013	200 m	MAN - 6S50MC-C8	4.7	C
1887	ROSTRUM ANTARCTICA IMO 9941611	40,076	2023	180 m	MAN - 5S50ME-C9	4.7	C
1888	AFRICAN CHEETAH IMO 9636462	66,582	2014	200 m	Mitsui - 7S50MC-B9.3 (Tier II)	4.7	C
1889	SEACON BANGKOK IMO 9991305	40,540	2024	183 m	J-ENG 6UEC42LSH-EcoD3	4.7	C
1890	IVY ALLIANCE IMO 9473834	55,886	2011	190 m	Wärtsilä - 6RT-flex50	4.7	C
1891	ULTRA ALPHA IMO 9700328	63,203	2015	200 m	MAN - 5G60ME-C9	4.7	C
1892	BBG NOVA IMO 9705342	63,313	2016	200 m	MAN - 5G60ME-C9	4.7	C
1893	ROSTRUM ASIA IMO 9910349	40,003	2021	180 m	Dalian Marine Diesel Works 5S50ME-C9	4.7	C
1894	NORDMOSEL IMO 9741877	39,968	2017	180 m	—	4.7	C
1895	AL WATHBA IMO 9663233	63,672	2013	200 m	MAN - 5S60ME-C8	4.7	C
1896	MARMOR IMO 9595149	38,464	2012	183 m	Hyundai - 6S60MC-C	4.7	C
1897	UNISON JASPER IMO 9838436	37,296	2019	180 m	Kawasaki - 5S50MC-C8	4.8	C
1898	INDIGO BREEZE IMO 9760160	60,430	2017	200 m	Mitsui - 6S50ME-B9	4.8	C
1899	ELECTRA IMO 9661223	87,150	2013	229 m	Hudong Heavy Machinery - 5660MC-C8.1	4.8	C
1900	KIRAN ADRIATIC IMO 9653185	63,477	2014	200 m	MAN - 5S60ME-C8	4.8	C

Page 38 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.