Most Emission-Efficient Bulk 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)

#8 of 3,531 bulk carriers

CO₂ intensity

1.8 g CO₂/dwt·nm

vs segment average (4.87)

-64% 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

3,604

vessels ranked

1.42

greenest (g CO₂/t·nm)

4.65

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
1	VULCANIA IMO 9718686	82,036	2015	229 m	MAN - 6S60ME-C8	1.4	A
2	BO MAY IMO 9980186	182,317	2025	292 m	Mitsui E&S DU Co Ltd 7G60ME-C10-EGRBP	1.6	A
3	SAO OASIS IMO 9840465	324,690	2021	340 m	Hyundai - 7G80ME-C9	1.6	A
4	SAO PEARL IMO 9840477	324,690	2021	340 m	Hyundai - 7G80ME-C9	1.6	A
5	SAO UNISON IMO 9841380	324,690	2022	333 m	Hyundai - 7G80ME-C9	1.6	A
6	SHANDONG DE YUN IMO 9872080	180,619	2020	292 m	MAN - 6G70ME-C9	1.7	A
7	ORE SHANTOU IMO 9847542	324,983	2020	340 m	MAN - 7G80ME-C9	1.7	A
9	GCL THAMES IMO 9966221	182,334	2023	292 m	MAN - 6G70ME-C9	1.8	A
8	GARGANTUA IMO 9712682	209,529	2015	300 m	CSSC - 6G70ME-C9.2 (Tier II)	1.8	A
10	HENG MAY IMO 9980174	181,500	2024	292 m	Mitsui E&S DU Co Ltd MAN B&W	1.8	A
11	SM GEMINI1 IMO 9841586	324,972	2020	340 m	MAN - 7G80ME-C9	1.8	A
12	MOUNT ELBRUS IMO 9945667	208,479	2021	300 m	HSD Engine Co Ltd - South Korea 6G70ME-C10-GI-HPSCR	1.8	A
13	NORD STEEL IMO 9966233	182,288	2019	292 m	MAN - 6G70ME-C9	1.9	A
15	BERGE CAUBVICK IMO 9335848	229,045	2006	320 m	Mitsubishi - 6UEC85LSII	1.9	A
14	FJ ROSSA IMO 9921611	182,345	2022	292 m	Hitachi - 7S65ME-C	1.9	A
16	GOLDEN SWIFT IMO 9702481	211,135	2016	300 m	Wärtsilä - 6X72	1.9	A
17	SPRING HARMONY IMO 9983578	182,498	2024	292 m	MAN-B&W 7S60ME-C10	1.9	A
19	SAMJOHN ARGONAUT IMO 9745938	209,756	2014	300 m	CSSC - 6G70ME-C9	1.9	A
18	LAVINIA OLDENDORFF IMO 9691931	207,562	2014	300 m	MAN - 6G70ME-C9	1.9	A
20	SAO JOY IMO 9824069	324,690	2020	340 m	Hyundai - 7G80ME-C9	1.9	A
21	GRAND SAKURA IMO 9913949	181,924	2021	292 m	MAN - 6G70ME-C9	1.9	A
22	BOKM TIANJIN IMO 9908607	324,922	2022	340 m	DALIAN MARINE - 7G80ME-C9	2.0	A
24	SHINWA-MARU IMO 9325295	297,541	2008	327 m	Hitachi - 6S80MC-C	2.0	A
23	CAPE OLYMPIA IMO 9860491	182,882	2020	292 m	MAN - 6S70MC-C	2.0	A
25	HELGA OLDENDORFF IMO 9713040	209,171	2016	300 m	MAN - 6G70ME-C9	2.0	A
26	NAVIOS ALTAIR IMO 9933092	182,115	2023	292 m	MAN B&W 6S70ME-C8	2.0	A
27	KSL SALVADOR IMO 9683271	180,958	2014	292 m	CSSC - 6G70ME-C9.2	2.0	A
28	GOODSHIP IMO 9311476	177,536	2005	289 m	MITSUI ENGINEERING 6S70MC	2.0	A
31	XH NINGBO IMO 9948126	210,101	2023	300 m	6G70ME-C10.5-HPSCR	2.0	A
30	ARIADNE IMO 9721877	207,520	2016	300 m	Hyundai - 6G70ME-C9	2.0	A
29	CAPE PLEASURE IMO 9960124	182,096	2024	292 m	MAN-B&W 6S70ME-C	2.0	A
32	ALPHA GALLANT IMO 9747871	181,162	2016	292 m	MAN - 6S70MC-C	2.0	A
33	CAPE OWL IMO 9729219	179,510	2016	292 m	MAN - 6G70ME-C9	2.0	A
34	HEDWIG OLDENDORFF IMO 9742728	209,239	2018	300 m	DALIAN MARINE - 6G70ME-C9	2.1	A
35	FRIEDRICH OLDENDORFF IMO 9889265	208,822	2020	300 m	Mitsui - 7S65ME-C8	2.1	A
37	SHANDONG CIVILIZATION IMO 9926415	210,963	2022	300 m	UnKnown 6G70ME-C10-HPSCR	2.1	A
36	CAPE SUN IMO 9953573	182,436	2023	292 m	MAN-B&W 7S65ME-C	2.1	A
38	CAPE KESTREL IMO 9767510	181,267	2016	292 m	Mitsui - 6S70MC-C	2.1	A
39	SHANDONG FU YI IMO 9748801	81,783	2019	229 m	MAN - 6S60ME-C8	2.1	A
40	AWAJISAN MARU IMO 9906805	181,994	2021	292 m	MAN - 6G70ME-C9	2.1	A
41	CAPE ELIANTO IMO 9938602	182,328	2022	292 m	Hitachi - 7S65ME-C	2.1	A
42	ORIENTAL EXPRESS IMO 9346366	180,211	2006	289 m	Mitsui - 6S70MC-C	2.1	A
43	CAPE MERCURY IMO 9943827	209,963	2023	300 m	China Shipbuilding Industry Co Diesel Engine Co Ltd 6G70ME0C10-HPSCR	2.1	A
47	TRUE CHARIOT IMO 9726774	182,571	2015	292 m	MAN - 6S60ME-C	2.1	A
46	BERGE MAWSON IMO 9738868	181,160	2015	292 m	Hitachi - 6S70MC-C	2.1	A
45	FRIENDSHIP IMO 9410454	176,948	2009	289 m	MAN - 6S70MC	2.1	A
44	HT HUA SHAN IMO 9468188	176,827	2009	289 m	Hitachi - 6S70MC	2.1	A
48	SHANDONG NEW ERA IMO 9910753	207,999	2022	300 m	MAN - 6G70ME-C10	2.2	A
50	NAVIOS AMETHYST IMO 9960148	182,212	2023	292 m	MAN B&W 6S70ME-C8	2.2	A
49	AQUAJOY IMO 9951111	182,082	2023	292 m	MAN - 6G70ME-C9	2.2	A

Page 1 of 71 — 3,531 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.