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)

#226 of 3,436 bulk carriers

CO₂ intensity

2.8 g CO₂/dwt·nm

vs segment average (4.71)

-40% 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

3,507

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
202	OMAHA IMO 9363041	177,651	2008	292 m	Hudong Heavy Machinery - 6S70MC	2.8	A
201	BELLA OLYMPIA IMO 9950600	82,205	2023	229 m	MAN-B&W 5S60ME-C	2.8	A
203	CSSC IMMINGHAM IMO 9853929	120,613	2021	255 m	MAN - 6G60ME-C9	2.8	A
204	CAPE AMANDA IMO 9552410	182,741	2011	292 m	Kawasaki - 6S70MC-C	2.8	A
208	ROBUSTO IMO 9386512	175,000	2006	289 m	MAN - 6S70MC	2.8	A
205	BASIC EXPLORER IMO 9944338	82,609	2023	229 m	Mitsui Engineering & Shipbuilding Co. Ltd. 7G50ME-C9	2.8	A
207	CAPE DIVERSITY IMO 9936745	182,236	2023	292 m	Hitachi - 7S65ME-C	2.8	A
206	JAG ANAND IMO 9463308	179,018	2011	292 m	Hyundai - 6S70MC-C	2.8	A
209	NAVIOS GEM IMO 9682942	181,192	2014	292 m	MAN - 6S70MC-C	2.8	A
212	DENSA SHARK IMO 9607681	179,227	2012	292 m	HHI - 6S70MC-C8	2.8	A
211	STAR VIRGINIA IMO 9698874	81,061	2015	229 m	Diesel United - 6S60ME-C	2.8	A
210	NEW YORK IMO 9405332	177,773	2010	292 m	Mitsui - 6S70MC	2.8	A
213	IANTHE IMO 9438779	180,018	2009	292 m	Doosan - 6S70MC-C	2.8	A
215	YAESU IMO 9945100	82,629	2023	229 m	MAN-B&W 6S50ME-C9	2.8	A
214	XIN MAY IMO 9837315	180,682	2019	292 m	CSSC - 6G70ME-C9 (Tier III)	2.8	A
220	ICONSHIP IMO 9641895	181,392	2013	292 m	Mitsui - 6S70MC-C	2.8	A
219	BH PROGRESS IMO 1025796	82,223	2024	229 m	MAN-B&W 6S60ME-C10	2.8	A
218	NAVIOS PHOENIX IMO 9552276	180,242	2009	289 m	Mitsui - 6S70MC-C	2.8	A
217	NORD ASTRALIS IMO 9738222	85,015	2017	229 m	Mitsui - 6S60ME-C8	2.8	A
216	EFROSSINI IMO 1050727	82,111	2023	229 m	—	2.8	A
221	NAOMI IMO 9750971	181,031	2016	292 m	CSSC - 6G70ME-C9	2.8	A
223	GCL PRAIA MOLE IMO 9974008	82,729	2024	229 m	MAN-B&W 7G50ME-C9	2.8	A
222	MICHALIS H IMO 9637791	180,355	2012	295 m	MAN - 6S70MC-C	2.8	A
224	BRILLIANT KNIGHT IMO 9878149	82,009	2020	229 m	6S60ME- C8.5	2.8	A
225	NAVIOS ALTAMIRA IMO 9589827	179,164	2006	292 m	HHI - 6S70MC-C7	2.8	A
227	ENNA IMO 9453743	175,975	2006	292 m	MAN - 6S70MC	2.8	A
226	LOWLANDS IYO IMO 9987249	82,019	2024	229 m	WinGD 6X52	2.8	A
229	BUNGO QUEEN IMO 9977816	82,729	2024	229 m	Mitsui E&S DU Co Ltd 7G50ME-C9-EGRBP	2.8	A
228	SEATTLE SLEW IMO 9573737	181,447	2010	292 m	Mitsui - 6S70MC-C	2.8	A
230	DUCHESS LILY IMO 9996977	82,720	2024	229 m	MAN-B&W 7G50ME-C9	2.9	A
231	LOWLANDS KAMI IMO 9968346	82,459	2024	229 m	Mitsui E&S DU Co Ltd 6S60ME-C10-EGRBP	2.9	A
232	CIARA MARU IMO 9932098	82,626	2022	229 m	MAN - 6S60ME-C10	2.9	A
233	CS CHENGDU IMO 9928231	84,952	2022	227 m	CSIC Diesel Engine Co Ltd 6S60ME-C8-HPSCR	2.9	A
240	BERGE SONG SHAN IMO 9436513	180,154	2010	295 m	DALIAN MARINE - 6S70MC-C	2.9	A
234	KEEPER IMO 9313395	174,674	2005	289 m	MAN - 6S70MC	2.9	A
239	LOWLANDS CONCORD IMO 9959412	82,778	2024	229 m	MAN-B&W 7G50ME-C9	2.9	A
238	CSSC ROTTERDAM IMO 9853905	120,640	2021	255 m	MAN - 6G60ME-C9	2.9	A
237	ROYAL LAUREL IMO 9873163	81,962	2019	229 m	Mitsui - 6S60ME-C8	2.9	A
236	LOWLANDS INFINITY IMO 9965784	82,239	2024	229 m	MAN-B&W 5S60ME-C10	2.9	A
235	NAVIOS STELLAR IMO 9498781	169,001	2009	288 m	HHI - 6S70MC6	2.9	A
248	TOKUGAWA IMO 9937220	82,570	2023	229 m	Mitsui Engineering & Shipbuilding C Ltd - Japan 6S60ME-C10	2.9	A
244	ETG MISHIMA IMO 9907847	81,957	2019	229 m	Mitsui - 6S60ME-C8.5	2.9	A
243	ATLANTIC SAMURAI IMO 9783980	81,725	2019	229 m	MAN - 7S50MC-C	2.9	A
247	JUBILANT DREAM IMO 9767508	181,265	2016	292 m	Mitsui - 6S70MC-C8.2	2.9	A
246	MAPLE WELL IMO 9993834	82,253	2024	229 m	MAN-B&W 6S60ME-C10	2.9	A
245	GCL GOMTI IMO 9939943	120,317	2021	255 m	MAN - 6G60ME-C9	2.9	A
242	STAR VOYAGER IMO 9968334	82,459	2024	229 m	Mitsui E&S DU Co Ltd 6S60ME-C10-EGRBP	2.9	A
241	SHANDONG DE FENG IMO 9872119	180,657	2021	292 m	CSSC-MES Diesel Co Ltd - China 6G70ME-C9-HPSCR	2.9	A
250	CRIMSON AMBER IMO 9836476	81,703	2019	229 m	MAN - 6S60ME-C8	2.9	A
249	MARATHOS IMO 9512056	119,363	2012	245 m	Mitsui - 6S60MC-C	2.9	A

Page 5 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.