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

Segment rank (2024)

#3 of 441 vehicle carriers

CO₂ intensity

7.8 g CO₂/dwt·nm

vs segment average (16.92)

-54% 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

450

vessels ranked

3.39

greenest (g CO₂/t·nm)

16.24

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
1	MG EARTH IMO 9774276	84,790	2016	229 m	Hitachi - 6S60ME-C7.1	3.4	A
2	TAMESIS IMO 9191307	38,500	2000	245 m	Korea Heavy Industries 8L70MC-MKV	7.8	A
3	TAMERLANE IMO 9218648	38,500	2001	245 m	Korea Heavy Industries 8L70MC-MKV	8.4	A
4	PARSIFAL IMO 9515395	43,878	2011	265 m	MAN - 7L70ME-C8	8.6	A
6	TYSLA IMO 9515400	43,878	2012	265 m	MAN - 7L70ME-C8	8.8	A
5	TØNSBERG IMO 9515383	43,878	2011	265 m	MAN - 7L70ME-C8	8.8	A
7	SALOME IMO 9515412	43,878	2012	265 m	MAN - 7L70ME-C8	9.1	A
8	HOEGH AURORA IMO 9962677	25,563	2024	200 m	MAN-B&W 7S60ME-C10-GI	10.5	A
9	HOEGH BOREALIS IMO 9962689	25,587	2024	200 m	MAN-B&W 7S60ME-C10-GI	11.0	A
10	HOEGH TROTTER IMO 9710749	21,901	2016	200 m	Hyundai - 6S60ME-C	11.1	A
11	POSEIDON LEADER IMO 9335965	21,449	2007	200 m	Mitsubishi - 8UEC60LSII	11.1	A
12	MANON IMO 9179725	28,360	1999	228 m	Korea Heavy Industries & Constr Co Ltd (HANJUNG) - South Korea 8S60MC	11.1	A
13	CELESTE ACE IMO 9982990	19,914	2024	200 m	MAN-B&W 6S60ME-C10-GI	11.2	A
14	ARC INDEPENDENCE IMO 9332925	30,383	2007	228 m	MAN - 7S60MC-C	11.3	A
15	UNDINE IMO 9240160	28,388	2003	228 m	HSD Engine Co. Ltd. 8S60MC	11.4	A
17	CARMEN IMO 9505027	31,143	2011	231 m	MAN - 7S60MC	11.5	A
16	HOEGH TRADER IMO 9171280	27,100	1998	229 m	Korea Heavy Industries 7S60MC	11.5	A
18	OBERON IMO 9377509	30,134	2008	237 m	MAN - 7S60MC-C	11.5	A
19	ANIARA IMO 9377494	30,089	2008	237 m	MAN - 8S60ME-C	11.5	A
20	FIDELIO IMO 9332937	30,137	2007	228 m	MAN - 7S60MC-C	11.6	A
21	MORNING LUCY IMO 9383431	28,080	2009	232 m	Hyundai - 7 S 60 MC	11.6	A
22	ARC INTEGRITY IMO 9332949	30,386	2008	228 m	MAN - 7S60MC-C	11.7	A
23	NABUCCO IMO 9731652	23,959	2021	200 m	MAN - 8S60ME-C8	11.8	A
24	HOEGH BERLIN IMO 9295842	27,178	2005	229 m	MAN - 7S60MC	11.8	A
25	HOEGH DETROIT IMO 9312470	27,100	2006	229 m	MAN - 7S60MC	11.9	A
26	MORNING CAMILLA IMO 9477919	22,692	2009	200 m	Mitsubishi - 8UEC60LSII	11.9	A
27	MORNING LISA IMO 9383417	28,084	2008	232 m	MAN - 7S60MC-C	11.9	A
28	EMDEN IMO 9941788	19,243	2023	200 m	MAN-B&W 6S60ME-C10-GI	12.1	A
29	GREEN OCEAN IMO 9981910	23,658	2021	200 m	MAN-B&W 7S60ME-C10	12.1	A
31	CERULEAN ACE IMO 9973872	19,889	2024	200 m	MAN-B&W 6S60ME-C10-GI	12.1	A
30	TIRRANNA IMO 9377523	30,089	2009	237 m	Doosan - 8S60ME-C	12.1	A
32	AQUARIUS LEADER IMO 9158276	22,815	1998	200 m	Mitsubishi - 8UEC60LS	12.2	A
33	HOEGH COPENHAGEN IMO 9420057	27,175	2010	229 m	HSD ENGINE CO. LTD. 7S60MC	12.2	A
34	DON CARLOS IMO 9122655	28,142	1997	228 m	Korea Heavy Industries & Constr Co Ltd (HANJUNG) - South Korea 8S60MC	12.3	A
36	DAISY LEADER IMO 9960227	18,605	2024	200 m	MAN-B&W 8S50ME-C9-GI	12.4	A
35	TIJUCA IMO 9377511	30,089	2008	237 m	Doosan - 7S60MC-C	12.4	A
37	FIGARO IMO 9505041	31,143	2011	231 m	MAN - 7S60MC	12.4	A
38	HOEGH ASIA IMO 9191876	27,564	2000	229 m	HSD Engine Co Ltd - South Korea 7S60MC	12.5	A
39	MIGNON IMO 9189251	28,126	1999	228 m	MAN - 8S60MC	12.5	A
40	FREESIA LEADER IMO 9933987	19,514	2023	200 m	Wärtsilä - 7X62DF	12.6	A
41	NEREUS HIGHWAY IMO 9974101	20,704	2024	200 m	WinGD 7X62DF	12.6	A
42	AMETHYST ACE IMO 9397999	18,760	2008	200 m	Mitsubishi - 7UEC60LSII	12.6	A
43	ARC COMMITMENT IMO 9505039	31,143	2011	231 m	MAN - 7S60MC	12.7	A
45	TOSCA IMO 9605798	22,585	2013	200 m	Mitsubishi - 7UEC60LSII	12.7	A
44	ASIAN EMPIRE IMO 9176606	25,765	1998	229 m	Hyundai - 7 S 60 MC	12.7	A
46	HOEGH ST. PETERSBURG IMO 9420045	27,352	2009	229 m	HSD ENGINE CO. LTD. 7S60MC	12.8	A
47	ELEKTRA IMO 9176577	28,126	1999	228 m	MAN - 8S60MC	12.8	A
48	SIEM ARISTOTLE IMO 9841029	19,183	2020	200 m	MAN - 6S60ME-C10	12.8	A
49	WOLFSBURG IMO 9941790	19,203	2023	200 m	MAN-B&W 6S60ME-C10-GI	12.8	A
50	TITANIA IMO 9505053	31,108	2011	231 m	MAN - 7S60MC	12.8	A

Page 1 of 9 — 441 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.