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 2025. Lower is greener. Pick a segment and size class to see the greenest vessels first.

Segment rank (2025)

#19 of 3,436 bulk carriers

CO₂ intensity

2.1 g CO₂/dwt·nm

vs segment average (4.71)

-56% 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

3,507

vessels ranked

1.74

greenest (g CO₂/t·nm)

4.46

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
1	GCL THAMES IMO 9966221	182,334	2023	292 m	MAN - 6G70ME-C9	1.7	A
2	SPRING HARMONY IMO 9983578	182,498	2024	292 m	MAN-B&W 7S60ME-C10	1.8	A
3	HL MERCURY IMO 9845142	324,993	2019	333 m	Hyundai - 7G80ME-C9	1.8	A
4	HANNES OLDENDORFF IMO 9750402	208,962	2017	300 m	CSSC - 6G70ME-C9	1.8	A
5	FRONTIER JASMINE IMO 9933418	182,130	2022	292 m	Mitsui Engineering & Shipbuilding C Ltd - Japan 6G70ME-C9-EGRBP	1.9	A
6	SHANDONG DEVELOPMENT IMO 9911240	207,995	2022	300 m	Hyundai Heavy Industries Co Ltd - South Korea 6G70ME-C10-HPSCR	1.9	A
7	MOUNT COOK IMO 9940344	208,886	2023	300 m	China Shipbuilding Industry Co Diesel Engine Co Ltd 6G70ME-C10-GI-HPSCR	1.9	A
8	CAPE PLEASURE IMO 9960124	182,096	2024	292 m	MAN-B&W 6S70ME-C	1.9	A
9	GRAND SAKURA IMO 9913949	181,924	2021	292 m	MAN - 6G70ME-C9	2.0	A
10	SAMJOHN ODYSSEY IMO 9745940	209,801	2014	300 m	CSSC - 6G70ME-C9	2.0	A
11	FRONTIER HOPE IMO 1028657	182,390	2025	292 m	Kanadevia Corporation	2.0	A
13	SHINWA-MARU IMO 9325295	297,541	2008	327 m	Hitachi - 6S80MC-C	2.0	A
12	GLOBAL BRIGHT IMO 9714240	207,562	2015	300 m	MAN - 6G70ME-C9	2.0	A
15	SPRING CITRUS IMO 9905215	182,348	2021	292 m	MAN - 7S65ME-C8.5	2.0	A
14	FJ ROSSA IMO 9921611	182,345	2022	292 m	Hitachi - 7S65ME-C	2.0	A
16	CAMELLIA DREAM IMO 9568017	206,862	2014	300 m	MAN - 6S70MC-C	2.0	A
17	CAPE OLYMPIA IMO 9860491	182,882	2020	292 m	MAN - 6S70MC-C	2.1	A
18	BERGE KUJU IMO 9374040	206,312	2006	300 m	Mitsui - 6S70MC-C	2.1	A
20	CAPE CONDOR IMO 9560390	180,253	2003	289 m	Mitsui - 6S70MC-C	2.1	A
19	AM TARANG IMO 9832913	180,885	2019	292 m	CSSC - 6G70ME-C9 (Tier III)	2.1	A
21	MOUNT HUA IMO 9945655	207,992	2024	300 m	HSD Engine Co Ltd - South Korea 6G70ME-C10-GI-HPSCR	2.1	A
22	FRONTIER WISH IMO 1028669	182,454	2025	292 m	Kanadevia Corporation	2.1	A
23	TOMINI K2 IMO 9617519	179,816	2014	292 m	DALIAN MARINE - 6S70ME-C8	2.1	A
24	NAVIOS AMETHYST IMO 9960148	182,212	2023	292 m	MAN B&W 6S70ME-C8	2.1	A
25	ORE AMAZONAS IMO 9565534	297,978	2010	327 m	CSSC - 6S80MC-C	2.1	A
28	MINERAL HONSHU IMO 9614892	181,408	2012	292 m	Mitsui - 6S70MC-C	2.1	A
29	SAIKO IMO 9446087	180,178	2010	289 m	MAN - 6S70MC-C	2.1	A
27	CAPE FALCON IMO 9916202	182,066	2022	292 m	Mitsui - 6G70ME-C9	2.1	A
26	DOUBLE STAR IMO 9479228	206,565	2011	300 m	MAN - 7S65ME-C	2.1	A
30	TOMINI K11 IMO 9860972	208,214	2020	300 m	CSSC - 6G70ME-C9	2.1	A
31	GH FITZGERALD IMO 9558218	180,694	2013	292 m	MAN - 7S65ME-C	2.1	A
32	ORE SALVADOR IMO 9607045	297,125	2013	327 m	Hitachi - 6S80MC-C	2.1	A
33	BERGE ATLAS IMO 9439113	180,180	2008	289 m	MAN - 6S70MC-C	2.1	A
34	HELGA OLDENDORFF IMO 9713040	209,171	2016	300 m	MAN - 6G70ME-C9	2.2	A
36	NAVIOS ASTRA IMO 9938614	182,393	2022	292 m	Hitachi - 7S65ME-C	2.2	A
35	CAROUGE IMO 9933080	182,080	2023	292 m	Mitsui E&S Machinery Co., Ltd. Tamano Machinery Factory	2.2	A
37	ROYAL ARGO IMO 9860489	182,883	2020	292 m	MAN - 6S70MC-C	2.2	A
38	CAPE KESTREL IMO 9767510	181,267	2016	292 m	Mitsui - 6S70MC-C	2.2	A
39	OCEAN CREST IMO 9446520	181,494	2010	292 m	Mitsui - 6S70MC-C	2.2	A
40	BERGE NIMBA IMO 9467677	175,949	2010	292 m	MAN - 6S70MC	2.2	A
41	NAVIOS ARMONIA IMO 9925813	182,079	2022	292 m	Mitsui Engineering & Shipbuilding C Ltd - Japan 6S70ME-C10	2.2	A
42	HUBERTUS OLDENDORFF IMO 9731602	209,095	2016	300 m	CSSC - 6G70ME-C9	2.2	A
44	MILLIE IMO 9492103	180,311	2009	295 m	DALIAN MARINE - 6S70MC-C	2.2	A
43	ALICE OLDENDORFF IMO 9942720	181,963	2022	292 m	MAN - 6G70ME-C9	2.2	A
45	ARIADNE IMO 9721877	207,520	2016	300 m	Hyundai - 6G70ME-C9	2.2	A
49	SHANDONG NEW ERA IMO 9910753	207,999	2022	300 m	MAN - 6G70ME-C10	2.2	A
48	GOLDEN ASO IMO 9701334	182,472	2015	292 m	MAN - 6S60ME-C	2.2	A
46	MH PHOENIX BEAUTY IMO 9455894	169,151	2010	288 m	Hyundai - 6S70MC	2.2	A
47	BULK SANTOS IMO 9849772	208,445	2020	300 m	Doosan - 6G70ME-C9 (Tier II)	2.2	A
50	SENORITA IMO 9284257	56,029	2005	190 m	Mitsui - 6S50MC-C	2.2	A

Page 1 of 69 — 3,436 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 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.