Most Emission-Efficient General Cargos

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)

#254 of 2,380 general cargos

CO₂ intensity

5.8 g CO₂/dwt·nm

vs segment average (13.96)

-58% 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

2,429

vessels ranked

3.13

greenest (g CO₂/t·nm)

14.48

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
249	BRASSIANA IMO 9613290	57,536	2012	200 m	STX - 6 S 50 MC-C	5.8	A
253	BERGE SNOWDON IMO 9738882	37,790	2015	180 m	MAKITA - 6S46MC-C	5.8	A
252	FEDERAL ALSTER IMO 9766164	36,583	2016	200 m	Jiangsu Antai Power Co. Ltd. 5G50ME-B9	5.8	A
255	21 SUNNY IMO 9615107	38,109	2012	180 m	MAN - 6S46MC-C	5.8	A
254	SAGA FRAM IMO 9613874	54,930	2013	200 m	STX - 5S60ME-C8	5.8	A
256	DSM ANAS IMO 9246308	32,259	2002	172 m	Akasaka - 6UEC52LA	5.8	A
257	BLUE BEAD IMO 9171113	29,478	1998	170 m	Mitsubishi - 5UEC52LS	5.9	A
259	LADY JAMILA IMO 9316983	33,427	2007	180 m	Mitsubishi - 5UEC52LA	5.9	A
258	ELM ARROW IMO 9419254	53,035	2010	196 m	MAN - 7S50MC-C	5.9	A
260	ERLYNE IMO 9382736	50,640	2010	190 m	MAN - 6S50MC-C	5.9	A
261	MOUNTPARK IMO 9773844	37,839	2016	183 m	MAN - 6S46MC-C8	5.9	A
262	DENIZ IMO 9738727	37,786	2015	180 m	MAKITA - 1D : 2 SA 6 CY	5.9	A
264	FIORA TOPIC IMO 9728461	34,356	2015	180 m	MAN - 6S46ME-B8.3	5.9	A
263	GARDNO IMO 9767704	36,643	2018	200 m	Hudong Heavy Machinery - 5G50ME-B9	5.9	A
265	FLORA K IMO 9708538	35,236	2013	177 m	MAN - 6S50ME-B8	5.9	A
266	UNI HARMONY IMO 9775165	37,655	2016	180 m	MAK/Caterpillar - 6S50ME-C8	5.9	A
267	IRIDA GS IMO 9614311	32,836	2013	181 m	Mitsubishi - 6UEC45LSE	5.9	A
268	POCHARD S IMO 9363314	32,285	2007	177 m	Mitsubishi - 6UEC52LA	5.9	A
269	FEDERAL MOSEL IMO 9766188	36,575	2017	200 m	Jiangsu Antai Power Co. Ltd. 5G50ME-B9	6.0	A
270	RIGHT COURSE IMO 9473688	33,735	2011	180 m	Mitsubishi - 6UEC45LSE	6.0	A
272	MANTA KEREM IMO 9539535	37,046	2015	178 m	MAN - 6S46ME-B8	6.0	A
271	DEVBULK SALIHA IMO 9449871	30,124	2011	179 m	MAKITA - 6S42MC	6.0	A
273	UBC STAVANGER IMO 9287340	31,751	2004	172 m	Akasaka - 6UEC52LA	6.0	A
274	NOVA IMO 9414917	50,806	2010	183 m	MAN - 6S50MC-C	6.0	A
276	SAGA HORIZON IMO 9121297	47,016	1995	199 m	Sulzer - 7RTA52	6.0	A
275	STAR ISFJORD IMO 9182978	45,740	2000	198 m	6S60MC	6.0	A
277	BIRCH ARROW IMO 9419242	52,998	2009	196 m	MAN - 7S50MC-C	6.0	A
278	SAGA MORUS IMO 9117741	56,816	1997	200 m	6S60MC	6.0	A
280	BAM PROTEUS IMO 9343625	33,782	2007	177 m	Mitsubishi - 6UEC52LA	6.0	A
279	OSHIMANA IMO 9249295	53,151	2003	199 m	6S60MC	6.0	A
281	STAR LOUISIANA IMO 9593880	50,720	2013	204 m	Hyundai - 5S60ME-C8	6.0	A
283	CANELO ARROW IMO 9107318	48,077	1997	190 m	5S60MC	6.1	A
282	MERLIN IMO 9604847	38,468	2011	183 m	Mitsui - 6S50MC-C	6.1	A
284	IPSWICH BAY IMO 9675729	38,190	2014	180 m	MAN - 6S46MC-C	6.1	A
285	EMMA OLDENDORFF IMO 9676606	38,300	2014	180 m	MAN - 5S50ME-B9	6.1	A
286	EDWINE OLDENDORFF IMO 9717668	38,617	2012	180 m	MAN - 5S50ME-B9	6.1	A
288	NAVI STAR IMO 9590979	38,243	2011	180 m	MAN - 6S46MC-C	6.1	A
287	TIBERIUS IMO 9665841	33,383	2013	177 m	Mitsubishi - 6UEC45LSE	6.1	A
289	LARCH ARROW IMO 9419230	53,022	2009	196 m	MAN - 7S50MC-C	6.1	A
290	LUCKY VOYAGER IMO 9393632	37,317	2009	178 m	Akasaka - AKASAKA-MITSUBISHI 6UEC52LA	6.1	A
291	VALENTINA 1 IMO 9336830	50,199	2007	190 m	STX - 6 S 50 MC-C	6.1	A
294	ECO CATHAR IMO 9526162	38,494	2012	185 m	Hitachi - 6S46MC-CMKVII	6.1	A
293	STAR JUVENTAS IMO 9254642	44,837	2004	198 m	Mitsui - 6S60MC	6.1	A
292	AMIRA LOULIA IMO 9385087	32,271	2008	177 m	Mitsubishi - 6UEC52LA	6.1	A
296	SOUTH SPIRIT IMO 9171125	29,482	1998	170 m	Mitsubishi - 5UEC52LS	6.1	A
295	UBC SANTA MARTA IMO 9380805	31,583	2008	172 m	Akasaka - 6UEC52LA	6.1	A
300	ALBERTO TOPIC IMO 9728473	34,356	2015	180 m	Mitsubishi - 6UEC45LSE	6.2	A
299	BBC URANUS IMO 9947768	40,297	2022	180 m	CSIC Diesel Engine Co Ltd 5S60ME-C9	6.2	A
298	DEVBULK IMABARI IMO 9550412	28,742	2009	170 m	MAKITA - 6S42MC	6.2	A
297	LINDEN IMO 9285354	37,821	2004	183 m	Mitsubishi - 6UEC52LS	6.2	A

Page 6 of 48 — 2,380 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.