Most Emission-Efficient Ro-Ro 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 2024. Lower is greener. Pick a segment and size class to see the greenest vessels first.

Segment rank (2024)

#162 of 214 ro-ro cargos

CO₂ intensity

36.9 g CO₂/dwt·nm

vs segment average (31.83)

+16% higher

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

219

vessels ranked

7.13

greenest (g CO₂/t·nm)

30.41

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
151	JUTLANDIA SEA IMO 9395355	11,702	2010	187 m	MAN - 8 L 48/60	35.1	D
152	BAHIA CARGO IMO 9207895	9,109	2001	163 m	MAN - 12V48/60	35.3	D
153	STENA FORETELLER IMO 9214666	10,539	2001	195 m	Sulzer - ZA40S	35.5	D
154	BRITANNIA SEAWAYS IMO 9153032	11,089	2000	198 m	Sulzer - 9ZA50S	35.7	D
155	WILHELMINE IMO 9539080	6,374	2012	152 m	Wärtsilä - 16V32	35.8	D
156	FIONIA SEA IMO 9395343	11,702	2006	187 m	MAN - 8 L 48/60	35.9	D
157	CORONA SEA IMO 9357597	11,702	2006	187 m	MAN - 8L48/60B	35.9	D
158	MN PELICAN IMO 9170999	8,491	1999	154 m	Wärtsilä - 16V46	35.9	D
159	OLYMPOS SEAWAYS IMO 9242390	9,865	2002	193 m	MAK/Caterpillar - 9M43	36.4	D
160	SUECIA SEAWAYS IMO 9153020	11,089	1999	197 m	Wärtsilä - 9ZA50S	36.5	D
161	FINLANDIA SEAWAYS IMO 9198721	8,702	2000	163 m	MAN - 12V48/60	36.9	D
162	HAFNIA SEA IMO 9357602	11,702	2008	187 m	MAN - 8 L 48/60	37.1	D
163	LISMORE IMO 9848467	11,949	2018	210 m	MAN - 8L48/60CR	37.2	D
164	ELISABETH RUSS IMO 9186429	7,296	1999	153 m	Wärtsilä - 12V46C	37.2	D
165	AKRANES IMO 9160774	7,382	1998	138 m	Wärtsilä - 16V46	37.2	D
166	LONGSTONE IMO 9848479	11,900	2019	210 m	MAN - 8L48/60CR	37.3	D
167	EUROCARGO VENEZIA IMO 9465552	10,765	2011	200 m	MAN - 9L60MC-C	37.5	D
168	COMMODORE GOODWILL IMO 9117985	5,215	1996	126 m	MAK/Caterpillar - 6M552C	37.7	D
169	EUROCARGO CATANIA IMO 9503627	11,415	2011	193 m	MAK/Caterpillar - 9M43C	37.8	D
170	EUROCARGO CAGLIARI IMO 9471068	10,780	2012	200 m	MAN - 9L60MC-C	38.2	D
171	GLYVURSNES IMO 9198977	7,226	1999	153 m	Wärtsilä - 16V46	38.7	D
172	EUROCARGO ROMA IMO 9465526	10,786	2010	200 m	MAN - 9L60MC-C	38.7	E
173	PETUNIA SEAWAYS IMO 9259501	10,407	2004	200 m	MAN - 9L60MC-C	39.3	E
174	MIDAS IMO 9002659	4,491	1990	109 m	Wärtsilä - 9 R 32 D	39.4	E
175	FINNMILL IMO 9212656	11,849	2002	163 m	MAN - 9L48/60	39.9	E
176	EUROCARGO RAVENNA IMO 9471056	10,779	2012	200 m	MAN - 9L60MC-C	40.1	E
177	BENTAYGA CARGO IMO 9207883	9,096	2000	163 m	MAN - 12V48/60	41.0	E
178	EUROCARGO MALTA IMO 9465514	10,787	2010	200 m	MAN - 9L60MC-C	41.4	E
179	FINNPULP IMO 9212644	11,787	2002	163 m	MAN - 9L48/60	41.7	E
180	IOSIF K IMO 7724265	5,300	1979	128 m	MAK/Caterpillar - 12M453AK	42.2	E
181	CIUDAD DE CADIZ IMO 9383560	3,500	2009	126 m	MAN - 8L32/40	42.4	E
182	EUROCARGO PALERMO IMO 9465538	10,770	2010	200 m	MAN - 9L60MC-C	42.7	E
183	EUROCARGO GENOVA IMO 9458951	10,780	2010	200 m	MAN - 9L60MC-C	43.4	E
184	MYKINES IMO 9121998	6,047	1996	139 m	Wärtsilä - 16V46	43.5	E
185	AUTOSUN IMO 9227053	6,670	2000	140 m	Wärtsilä - 8L46C	43.5	E
186	MN TOUCAN IMO 9112466	4,329	1995	115 m	MAK/Caterpillar - 6M32	44.0	E
187	MN COLIBRI IMO 9207390	4,169	2000	116 m	MAK/Caterpillar - 6M32	44.9	E
188	EUROCARGO ALEXANDRIA IMO 9465540	10,773	2011	200 m	MAN - 9L60MC-C	45.7	E
189	MAYAR IMO 9226360	8,800	2001	174 m	MAK/Caterpillar - 9M43	46.5	E
190	NEPTUNE THELISIS IMO 9306718	6,200	2006	165 m	Wärtsilä - 6 L 46 C	47.0	E
191	CAROLINE RUSS IMO 9197533	7,296	1999	153 m	Wärtsilä - 16 V 46 B	47.8	E
192	EOS IMO 9132014	8,936	1998	154 m	Wärtsilä - 16 V 46 B	48.4	E
193	AUTOSTAR IMO 9206786	6,670	2000	140 m	Wärtsilä - 8L46C	49.2	E
194	NEPTUNE OKEANIS IMO 9306706	6,200	2005	165 m	Wärtsilä - 6 L 46 C	49.6	E
195	FJARDVAGEN IMO 7226952	2,566	1972	110 m	Lindholmen Motor AB - Sweden 8PC2V-400	49.8	E
196	SIGRID IMO 9631840	2,530	2013	100 m	MaK 6M20C	49.9	E
197	AUTOSKY IMO 9206774	6,670	2000	140 m	Wärtsilä - 8L46C	50.7	E
198	AUTOPRESTIGE IMO 9190157	4,311	1999	129 m	Wärtsilä - 12V32E	51.9	E
199	RO QUEEN IMO 9104263	4,803	1995	135 m	Hitachi Zosen Corp - Japan 7S50MC	52.8	E
200	SALAMMBO IMO 9142461	5,914	1997	162 m	Sulzer - 6ZAL40S	55.8	E

Page 4 of 5 — 214 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.