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)

#24 of 214 ro-ro cargos

CO₂ intensity

19.3 g CO₂/dwt·nm

vs segment average (31.83)

-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

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
1	ENDURANCE IMO 9121273	48,988	1996	265 m	Mitsubishi - 7UEC85LSC	7.1	A
2	JASMINE LEADER IMO 9925368	19,359	2023	200 m	WinGD 7X62DF	13.1	A
3	LAURELINE IMO 9823352	20,615	2019	216 m	MAN - 7S50ME-C9	13.7	A
4	SIXTINE IMO 9831165	20,615	2019	216 m	MAN - 7S50ME-C9	14.0	A
5	YSALINE IMO 9823364	20,615	2019	216 m	MAN - 7S50ME-C9	14.0	A
6	SAFFET BEY IMO 8417118	14,107	1987	164 m	MAK/Caterpillar - 6M601AK	14.3	A
7	HERMINE IMO 9831177	20,615	2019	216 m	Hyundai - 7S50ME-C9	14.4	A
8	ULUSOY-5 IMO 8501464	14,103	1987	164 m	MAK/Caterpillar - 6M601AK	14.6	A
9	SERAPHINE IMO 9889710	20,092	2022	216 m	Hyundai Heavy Industries Co Ltd - South Korea 7S50ME-C9-GI	14.6	A
10	FAUSTINE IMO 9889708	20,194	2021	216 m	Hyundai Heavy Industries Co Ltd - South Korea 7S50ME-C-GI	15.8	A
11	DONG-A METIS IMO 9419747	22,582	2010	199 m	MAN - 6S60MC-C	16.0	A
12	DONG-A GLAUCOS IMO 9441867	26,985	2011	232 m	Hyundai - 8S60ME-C8	16.1	A
13	BOTNIA ENABLER IMO 9884679	24,600	2022	242 m	Wärtsilä - 7RT-flex50DF	16.1	A
14	BALTIC ENABLER IMO 9884681	24,600	2022	242 m	Wärtsilä - 7RT-flex50DF	17.1	A
15	DELPHINE IMO 9789245	27,687	2018	234 m	Hyundai - 9S60ME-C	17.2	A
16	ORANJEBORG IMO 9232797	15,126	2004	159 m	Wärtsilä - 6 L 46 C	17.5	A
17	YOUNG SHIN IMO 9021332	14,274	1992	180 m	Mitsubishi - 7UEC60LA	17.8	A
18	CELINE IMO 9789233	27,687	2017	234 m	Hyundai - 9S60ME-C	17.8	A
19	LIDER HALUK IMO 8404276	9,334	1985	135 m	Wärtsilä - 16V32D	18.3	A
20	ARK FUTURA IMO 9129598	13,500	1996	183 m	MAN - 8 L 58/64	18.5	A
21	HOEGH BRASILIA IMO 9368895	17,252	2007	180 m	Yichang - 7S60MC-C	18.9	A
22	GLOVIS COUNTESS IMO 9476721	18,701	2010	200 m	Mitsubishi - 7UEC60LSII	19.1	A
23	NEPTUNE LEADER IMO 9402744	12,853	2008	183 m	Hitachi - 6S60MC-C	19.3	A
24	HOEGH SYDNEY IMO 9368900	17,311	2007	180 m	Yichang - 7S60MC-C	20.0	A
25	MAZARINE IMO 9376696	14,552	2009	195 m	MAK/Caterpillar - 12M43C	20.9	A
26	SC CONNECTOR IMO 9131993	8,843	1997	154 m	Wärtsilä - 16 V 46 B	20.9	A
27	SCA ORTVIKEN IMO 9087374	11,521	1996	170 m	MAK/Caterpillar - 6M552C	21.1	A
28	PALATINE IMO 9376701	14,565	2009	195 m	MAK/Caterpillar - 12M43C	21.1	A
29	PEREGRINE IMO 9376725	14,538	2010	195 m	MAK/Caterpillar - 12M43C	21.7	A
30	EUROCARGO ISTANBUL IMO 9165310	13,179	1998	195 m	MAN - 9L58/64	22.0	A
31	SCA OSTRAND IMO 9087362	11,561	1996	170 m	MAK/Caterpillar - 6M552C	22.0	A
32	SOMERSET IMO 9188221	12,500	1999	183 m	Sulzer - 7RTA52U	22.1	A
33	MOSEL ACE IMO 9177052	12,761	2000	176 m	'Uljanik' Strojogradnja dd - Croatia 7S50MC	22.2	A
34	ECO MEDITERRANEA IMO 9859595	18,102	2022	238 m	Hyundai Heavy Industries Co Ltd - South Korea 9S50ME-C9	22.3	A
35	VESPERTINE IMO 9376713	14,483	2010	195 m	MAK/Caterpillar - 12M43C	22.3	A
36	VASSILIOS IMO 8813154	13,772	1990	158 m	Wärtsilä - 9R46	22.4	A
37	BALTIC BRIGHT IMO 9129263	6,302	1995	134 m	MAK/Caterpillar - MAK 6 M 32	22.4	A
38	ECO ITALIA IMO 9859612	18,080	2022	238 m	Hyundai Heavy Industries Co Ltd - South Korea 9S50ME-C9	22.5	A
39	FERRYMAR IMO 9966805	6,726	2023	120 m	MAN 6L27/38	22.6	A
40	CATHERINE IMO 9209453	13,320	2002	182 m	Wärtsilä - 12V46C	22.9	A
41	SCA OBBOLA IMO 9087350	11,446	1996	170 m	MAK/Caterpillar - 6M552C	22.9	A
42	EPHESUS SEAWAYS IMO 9816830	17,011	2019	237 m	MAN - 8S50ME-C9	23.3	A
43	TAVASTLAND IMO 9334959	13,800	2006	191 m	MAN - 9L48/60B	23.4	A
44	TROY SEAWAYS IMO 9816842	17,183	2019	237 m	MAN - 8S50ME-C	23.4	B
45	GALATA SEAWAYS IMO 9422134	15,121	2010	223 m	MAK/Caterpillar - 9M43	23.5	B
46	SUMELA SEAWAYS IMO 9356749	14,915	2008	223 m	MAK/Caterpillar - 9M43	23.6	B
47	LINK SUN IMO 8805597	4,452	1989	107 m	Wärtsilä - 8 R 32 D	23.6	B
48	AMILCAR IMO 9207998	14,268	2000	193 m	MAK/Caterpillar - 9M43	23.7	B
49	MYRA SEAWAYS IMO 9422122	15,391	2009	223 m	MAK/Caterpillar - 9M43	23.7	B
50	ULUSOY-15 IMO 9506265	13,231	2013	208 m	MAN - 7L48/60CR	23.8	B

Page 1 of 5 — 214 vessels

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.