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)

#257 of 3,436 bulk carriers

CO₂ intensity

2.9 g CO₂/dwt·nm

vs segment average (4.71)

-39% 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
251	MARATHOS IMO 9512056	119,363	2012	245 m	Mitsui - 6S60MC-C	2.9	A
250	PHILIPP OLDENDORFF IMO 9540869	115,156	2012	254 m	Hudong Heavy Machinery - 6 S 60 MC-C 8	2.9	A
249	NICOLAUS SCHULTE IMO 9966312	82,004	2023	229 m	IHI Power Systems Co Ltd 6X52	2.9	A
255	ENERGY COSMOS IMO 9878151	82,000	2020	229 m	6S60ME- C8.5	2.9	A
256	PUNTA DEL CHILENO IMO 1030868	82,050	2025	229 m	MAN-B&W 6G50ME-C9	2.9	A
254	ALPHA LIBERTY IMO 9590709	179,276	2011	292 m	MAN - 6S70MC-C	2.9	A
258	GUANG BO IMO 9965033	82,245	2023	229 m	MAN-B&W 6S60ME-C10	2.9	A
257	ARMONIA A IMO 9752151	82,085	2018	229 m	Hudong Heavy Machinery - 6 S 60 MC-C 8	2.9	A
260	REGINA OLDENDORFF IMO 9535242	121,677	2011	260 m	MAN - 6S60MC-C	2.9	A
259	CASTILLO DE MALPICA IMO 9722962	119,613	2015	259 m	Wärtsilä - 6G60ME-C9	2.9	A
261	ULTRA LYNX IMO 9811048	81,607	2018	229 m	Hitachi - 6S60ME-C8	2.9	A
265	SCION MATHILDA IMO 1023956	82,249	2024	229 m	MAN-B&W 6G50ME-C10	2.9	A
268	OCEAN ROAD IMO 9503201	179,181	2009	292 m	Hyundai - 6S70MC-C	2.9	A
264	ANABELA IMO 9587350	177,029	2010	292 m	Hyundai - 6S70MC 6	2.9	A
267	NEW ELIAS IMO 9313400	174,222	2003	289 m	Hudong Heavy Machinery - 6S70MC MK6	2.9	A
263	AGIA FILOTHEI A IMO 9781011	81,795	2019	229 m	Mitsui - 6S50ME-B9	2.9	A
262	AMO IMO 9296626	82,214	2006	229 m	MAN - 6S60MC	2.9	A
266	AMERICA IMO 1023968	82,142	2021	229 m	MAN-B&W 6G50ME-C10	2.9	A
271	PYXIS OCEAN IMO 9798856	79,898	2017	229 m	Mitsui - 6S60ME-C8	2.9	A
270	BASIC SKY IMO 9982196	81,917	2023	229 m	Wärtsilä - 6X52	2.9	A
272	AESCHYLUS GRAECIA IMO 9841964	82,041	2019	229 m	DALIAN MARINE - 6S60ME-C8 (Tier II)	2.9	A
269	BTG DENALI IMO 9687851	81,084	2015	229 m	MAN - 6S60ME-C	2.9	A
273	NAVIOS SOL IMO 9545170	180,095	2009	289 m	Mitsui - 6S70MC-C	2.9	A
275	JAG AMOL IMO 9676113	81,843	2015	229 m	MAN - 7S50MC-C	2.9	A
274	TRANSCENDEN EMERALD IMO 9948839	84,957	2023	227 m	CSIC Diesel Engine Co Ltd 6S60ME-C8	2.9	A
276	IMPERIUS IMO 9403504	180,000	2011	292 m	Hyundai - 6S70MC	2.9	A
278	LOWLANDS AMBITION IMO 9947287	82,400	2024	229 m	Mitsui E&S DU Co Ltd 6S60ME-C10-EGRBP	2.9	A
277	STAR TOPAZ IMO 9843364	82,044	2019	229 m	DALIAN MARINE - 6S60ME-C8	2.9	A
279	NAVIOS MELODIA IMO 9451276	179,132	2010	292 m	HHI - 6S70MC-C7	2.9	A
280	AQUAVITA AIR IMO 9846110	82,192	2020	229 m	Kawasaki - 6S60MC-C8	2.9	A
283	NORA SCHULTE IMO 9966300	81,957	2023	229 m	IHI Power Systems Co Ltd 6X52	3.0	A
282	SEACON ANTWERP IMO 9984730	82,806	2024	229 m	CSSC-MES Diesel Co. Ltd. 7G50ME-C9-EGRBP	3.0	A
281	GCL KRISHNA IMO 9939931	120,326	2023	255 m	China Shipbuilding Industry Co Diesel Engine Co Ltd 6G60ME-C9-HPSCR	3.0	A
284	AQUAVITA AIM IMO 9846108	82,192	2019	229 m	MAN - 6S60MC-C8	3.0	A
285	GIANT ACE IMO 9501851	179,184	2009	292 m	Hyundai - 6S70MC-C	3.0	A
286	NORDIC NULUUJAAK IMO 9884966	95,758	2021	230 m	MAN - 6G60ME-C9	3.0	A
287	SARAH H IMO 9858539	80,717	2020	229 m	Mitsui - 6S60ME-C8	3.0	A
291	MONEMVASIA IMO 9455686	174,999	2009	292 m	MAN - 6S70MC	3.0	A
290	DONNA ALEXANDRA IMO 9950595	82,183	2023	229 m	MAN-B&W 5S60ME-C	3.0	A
289	VENATOR IMO 9836983	81,700	2019	229 m	MAN - 6S60ME-C8.2	3.0	A
288	KEY KNIGHT IMO 9512317	82,099	2012	229 m	Mitsui - 7 S 50 MC-C	3.0	A
296	TROODOS OAK IMO 9875135	85,439	2020	229 m	Hitachi - 6L35MC	3.0	A
298	NAVIOS KOYO IMO 9598127	181,415	2011	292 m	Mitsui - 6S70MC-C	3.0	A
297	EASTERN HEATHER IMO 9948023	82,270	2021	229 m	MAN - 6S60ME-C10	3.0	A
295	NAVIOS BONAVIS IMO 9446996	179,850	2009	292 m	Doosan - 6S70MC-C	3.0	A
294	EMMY IMO 9956202	82,151	2023	229 m	6S60ME-C10-HSCR	3.0	A
293	BERGE TORRE IMO 9453731	175,935	2011	292 m	MAN - 6S70MC	3.0	A
292	XING AN HAI IMO 1025784	82,000	2024	229 m	MAN-B&W 6S60ME-C10	3.0	A
300	SHANDONG XIN XIANG IMO 1026568	82,135	2025	229 m	MAN-B&W 6G50ME-C9	3.0	A
299	BARDONNEX IMO 9566590	107,235	2013	255 m	MAN - 6S60MC-C	3.0	A

Page 6 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.