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)

#304 of 2,380 general cargos

CO₂ intensity

6.2 g CO₂/dwt·nm

vs segment average (13.96)

-55% 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
301	V TAURUS IMO 9496161	33,193	2010	177 m	Mitsubishi - 6UEC45LSE	6.2	A
302	LADY SERRA IMO 9449883	30,124	2011	179 m	MAKITA - 6S42MC	6.2	A
303	IRON LADY IMO 9385099	32,283	2009	177 m	Mitsubishi - 6UEC52LA	6.2	A
305	SAGA VIKING IMO 9233466	46,901	2002	199 m	Diesel United - 7RTA52	6.2	A
304	REESTBORG IMO 9592563	23,296	2013	170 m	Wärtsilä - 9L32C	6.2	A
306	21 HONOR IMO 9495363	37,155	2012	178 m	Akasaka - 6UEC45LSE	6.2	A
307	BERGE ANNUPURI IMO 9713193	34,536	2016	180 m	Mitsubishi - 6UEC45LSE-Eco-B2	6.2	A
308	SWORD LION IMO 9136785	27,919	1996	169 m	Hitachi - 5S50MC	6.2	A
310	ACACIA IMO 9597642	33,677	2011	180 m	Mitsubishi - 6UEC52LA	6.2	A
309	UBC SALAVERRY IMO 9426881	33,305	2010	172 m	Akasaka - 6UEC45LSE	6.2	A
311	PATRIA IMO 9580053	32,069	2014	176 m	Mitsubishi - 6UEC45LSE	6.3	A
312	FU HAI IMO 9766657	31,777	2016	166 m	MAN - 6S46ME-B8.2	6.3	A
314	MELOI IMO 9392119	33,355	2009	180 m	Mitsubishi - 6UEC52LA	6.3	A
313	ATHENA SAN IMO 9623659	38,503	2011	183 m	MAN - 6S50MC-C	6.3	A
315	SEA FAITH IMO 9655420	33,343	2014	180 m	Mitsubishi - 6UEC45LSE	6.3	A
317	V LYRA IMO 9539444	33,628	2012	180 m	Mitsubishi - 6UEC52LA	6.3	A
316	ECO MONEGASQUE IMO 9701011	33,190	2015	180 m	MAKITA - 6S46MC-C8.2	6.3	A
318	ZIMRIDA IMO 9380817	37,296	2008	178 m	Akasaka - 6UEC52LA	6.3	A
319	TIAN XI IMO 9704764	38,098	2016	190 m	Wärtsilä - 6RT-flex50	6.3	A
322	TIAN LE IMO 9722730	37,993	2016	190 m	Hudong Heavy Machinery - 6RT-flex50-B	6.4	A
321	NORDIC MALMOE IMO 9602679	35,038	2012	180 m	STX - 5S50ME-C8 TIER 2	6.4	A
320	ARIANDA IMO 9537276	37,495	2010	190 m	Wärtsilä - 6RTA48T	6.4	A
324	AMELIE IMO 9647289	34,650	2013	180 m	LINSHAN MARINE DIESEL CO.LTD. 5RT-FLEX 50	6.4	A
323	COOL BREEZE IMO 9400930	32,283	2010	177 m	Mitsubishi - 6UEC52LA	6.4	A
325	LADY ZEHRA IMO 9309617	31,734	2006	172 m	Mitsubishi - 6UEC52LA	6.4	A
326	SATURN J IMO 9546174	33,477	2010	180 m	Wärtsilä - 6RTA48T	6.4	A
327	ECO NEMESIS IMO 9711913	33,375	2015	180 m	Mitsubishi - 6UEC45LSE	6.4	A
328	TAN BINH 299 IMO 9459149	33,132	2011	177 m	Mitsubishi - 6UEC45LSE	6.4	A
329	SSI MERAL HANIM IMO 9491678	37,238	2011	178 m	Akasaka - 6UEC52LA	6.4	A
332	GRAIN WAY IMO 9545560	23,000	2009	160 m	SHAANXI DIESEL ENGINE HEAVY INDUSTRY CO. LTD. 6S42MC	6.4	A
331	SHAMAN WISDOM IMO 9563407	35,052	2010	180 m	STX - 6 S 50 MC-C	6.4	A
330	UBC TAMPA IMO 9416707	37,724	2009	183 m	Akasaka - 6UEC52LS	6.4	A
333	K BEREKET IMO 9370408	33,225	2008	180 m	Mitsubishi - 6UEC52LA	6.5	A
334	CORINTHIAN SPIRE IMO 9478482	32,155	2009	177 m	Mitsubishi - 6UEC52LA	6.5	A
335	KAMENARI IMO 9400942	32,326	2010	177 m	Mitsubishi - 6UEC52LA	6.5	A
336	BC LARA IMO 9598024	38,494	2011	183 m	MAKITA - 6S50MC-C	6.5	A
338	EKATERINA IMO 9641807	38,182	2013	180 m	MAKITA - MAKITA-MITSUI-MAN B&W 6S46MC-C	6.5	A
337	ERNA OLDENDORFF IMO 9717670	38,330	2016	180 m	MAN - 5S50ME-B9	6.5	A
339	V CETUS IMO 9370381	33,401	2008	180 m	Mitsubishi - 6UEC52LA	6.5	A
340	IWAMI IMO 9414981	20,142	2009	147 m	MAKITA - 6S42MC	6.5	A
341	PLUTO IMO 9432531	32,092	2014	176 m	Mitsubishi - 6UEC45LSE	6.5	A
344	FIRST BROTHER IMO 9266140	32,385	2003	177 m	Mitsubishi - 6UEC52LA	6.5	A
345	NORDIC OSLO IMO 9626601	35,866	2012	180 m	STX - 6 S 50 MC-C	6.5	A
343	AMIRA MARYANA IMO 9379650	32,029	2007	176 m	Mitsubishi - 6UEC52LA	6.5	A
342	KERASIA S IMO 9496185	33,170	2011	177 m	Mitsubishi - 6UEC45LSE	6.5	A
349	NANAMI FORTUNE IMO 9712656	33,421	2014	180 m	Mitsubishi - 6UEC45LSE	6.6	A
348	NOVI IMO 9424120	34,044	2011	176 m	Mitsubishi - 6UEC45LSE	6.6	A
347	GLOBAL ARSENAL IMO 9363302	32,313	2008	177 m	Mitsubishi - 6UEC52LA	6.6	A
346	SIROCO IMO 9317705	37,534	2006	178 m	Akasaka - AKASAKA-MISTUBISHI 6UEC52LA	6.6	A
350	SUNSET IMO 9402122	37,334	2009	178 m	Akasaka - 6UEC52LA	6.6	A

Page 7 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.