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)

#106 of 3,531 bulk carriers

CO₂ intensity

2.5 g CO₂/dwt·nm

vs segment average (4.87)

-48% 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
100	KSL SEATTLE IMO 9683245	181,015	2014	292 m	CSSC - 6G70ME-C9.2	2.5	A
102	BERGE DINARA IMO 9273985	203,163	2005	300 m	Hitachi - 6S70MC	2.5	A
103	BULK TIRRENO IMO 9624263	181,366	2013	292 m	Mitsui - 6S70MC-C	2.5	A
104	SHANDONG DE TAI IMO 9872121	180,701	2021	292 m	MAN - 6G70ME-C9	2.5	A
105	EREIKOUSSA IMO 9591739	178,895	2012	292 m	Hyundai - 6S70MC-C	2.5	A
108	SEAFIGHTER IMO 9686326	181,068	2015	292 m	Doosan - 6G70ME-C9.2	2.5	A
107	MILLICENT IMO 9522714	180,223	2011	295 m	MAN - 6S70MC-C	2.5	A
106	MINERAL HONSHU IMO 9614892	181,408	2012	292 m	Mitsui - 6S70MC-C	2.5	A
109	DUCHESS LILY IMO 9996977	82,720	2024	229 m	MAN-B&W 7G50ME-C9	2.5	A
110	CAPE PEREGRINE IMO 9500754	180,643	2012	292 m	MAN - 7S65ME-C	2.5	A
111	GH KAHLO IMO 9617521	179,816	2014	290 m	DALIAN MARINE - 6S70ME-C8	2.5	A
112	NAVIOS KOYO IMO 9598127	181,415	2011	292 m	Mitsui - 6S70MC-C	2.5	A
115	HERO IMO 9446867	178,076	2010	292 m	Hudong Heavy Machinery - MAN B&W; 6 S 70 MC MK 6	2.5	A
114	FRONTIER JACARANDA IMO 9552393	182,757	2011	292 m	Kawasaki - 6S70MC-C	2.5	A
113	SSI BRILLIANT IMO 9567099	175,428	2012	292 m	Hitachi - HITACHI-MAN B&W 6S70MC6	2.5	A
117	OU MAY IMO 9751016	180,003	2017	295 m	DALIAN MARINE - 6G70ME-C9	2.5	A
116	CAPE HARMONY IMO 9514212	178,373	2012	292 m	Mitsui - 6S70MC-C	2.5	A
118	NSU NEWSTAR IMO 9668348	181,133	2014	292 m	MAN - 6S70MC-C	2.5	A
119	SHANDONG DREAM IMO 9907952	207,996	2021	300 m	Dalian Marine Diesel Co Ltd - China 6G70ME-C10-HPSCR	2.6	A
120	PIGASSOS IMO 9423073	176,364	2011	292 m	MAN - 6S70MC	2.6	A
121	TRUE CONRAD IMO 9778430	207,609	2017	300 m	CSSC - 6G70ME-C9	2.6	A
123	WANG MAY IMO 9837327	180,682	2019	292 m	CSSC - 6G70ME-C9 (Tier III)	2.6	A
122	SHANDONG DE RUI IMO 9872042	180,613	2020	292 m	MAN - 6G70ME-C9	2.6	A
127	STAR MARTHA IMO 9564097	180,274	2010	289 m	Mitsui - 6S70MC-C	2.6	A
126	HANNA OLDENDORFF IMO 9731614	208,941	2017	300 m	CSSC - 6G70ME-C9	2.6	A
125	AM PORT CARTIER IMO 9546801	180,715	2013	292 m	Wärtsilä - 6RT-flex68	2.6	A
124	BERGE HOVERLA IMO 9497359	175,918	2010	292 m	Hitachi - 6S70MC (MK6)	2.6	A
129	STAR VESTA IMO 9446506	180,136	2010	289 m	Mitsui - 6S70MC-C	2.6	A
128	CAPE IRIS IMO 9563689	181,403	2012	292 m	Mitsui - 6S70MC-C	2.6	A
132	WAH SHAN IMO 9693551	179,546	2015	292 m	MAN - 6S70MC-C	2.6	A
131	ZAMPA BLUE IMO 9454163	178,459	2011	292 m	MAN - 6S70MC	2.6	A
130	SAKIZAYA TREASURE IMO 9861328	82,500	2020	229 m	Mitsui - 6S60ME-C8	2.6	A
134	DUKESHIP IMO 9402304	181,453	2010	292 m	MAN - 6S70MC-C	2.6	A
133	MILLIE IMO 9492103	180,311	2009	295 m	DALIAN MARINE - 6S70MC-C	2.6	A
138	EHIME QUEEN IMO 9767522	181,221	2016	292 m	Mitsui - 6S70MC-C	2.6	A
137	SEATTLE SLEW IMO 9573737	181,447	2010	292 m	Mitsui - 6S70MC-C	2.6	A
139	KSL SYDNEY IMO 9683269	181,009	2014	292 m	CSSC - CMD-MAN B&W 6G70ME-C9.2	2.6	A
136	KSL SAPPORO IMO 9683257	180,960	2012	292 m	CSSC - CMD-MAN B&W 6G70ME-C9.2	2.6	A
135	NAVIOS ALTAMIRA IMO 9589827	179,164	2006	292 m	HHI - 6S70MC-C7	2.6	A
141	EMERALD SHENGSI IMO 9981300	85,594	2024	229 m	MAN-B&W 6S60ME-C10	2.6	A
140	BERGE TORRE IMO 9453731	175,935	2011	292 m	MAN - 6S70MC	2.6	A
142	MOANA INFINITY IMO 9261932	88,233	2002	230 m	Kawasaki - 6S60MC	2.6	A
145	SAKIZAYA UNICORN IMO 9892676	82,527	2021	229 m	MAN - 6S60ME-C8	2.6	A
146	FRONTIER HARVEST IMO 9487976	179,293	2011	292 m	Hyundai - 8RTA82C	2.6	A
144	KSL SAKURA IMO 9719941	181,062	2015	292 m	MAN - 6G70ME-C9	2.6	A
143	GCL KRISHNA IMO 9939931	120,326	2023	255 m	China Shipbuilding Industry Co Diesel Engine Co Ltd 6G60ME-C9-HPSCR	2.6	A
150	AQUABEAUTY IMO 9881378	82,023	2020	229 m	Mitsui - 6S60ME-C8.5	2.6	A
149	MARAN HORIZON IMO 9702699	180,940	2016	292 m	MAN - 6G70ME-C9	2.6	A
148	FRONTIER BONANZA IMO 9511947	179,435	2010	292 m	Hyundai - 6S70MC-C7	2.6	A
147	ANNABEL L IMO 9853711	180,803	2019	292 m	CSSC - 6G70ME-C9.2	2.6	A

Page 3 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.