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)

#100 of 3,531 bulk carriers

CO₂ intensity

2.5 g CO₂/dwt·nm

vs segment average (4.87)

-49% 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
51	CIC PAOLA IMO 9692820	181,059	2014	292 m	MAN - 6G70ME-C9	2.2	A
54	BULK SAO PAULO IMO 9849760	208,445	2020	300 m	Doosan - 6G70ME-C9 (Tier II)	2.2	A
53	BERGE ATLAS IMO 9439113	180,180	2008	289 m	MAN - 6S70MC-C	2.2	A
52	NEW FUTURE IMO 9750816	182,598	2016	292 m	Hitachi - 7S65ME-C	2.2	A
55	PACIFIC ANOUK IMO 9835874	181,048	2019	292 m	MAN - 6G70ME-C9	2.2	A
56	HANNES OLDENDORFF IMO 9750402	208,962	2017	300 m	CSSC - 6G70ME-C9	2.2	A
57	NISEKO QUEEN IMO 9889289	208,786	2020	300 m	Mitsui - 7S65ME-C8	2.2	A
58	ALPHA TREASURE IMO 9919216	209,260	2022	300 m	CSSC-MES Diesel Co Ltd - China 6G70ME-C9-HPSCR	2.2	A
59	CAPE EAGLE IMO 9624469	181,529	2012	292 m	Mitsui - 6S70MC-C	2.2	A
61	UNITED GRACE IMO 9870147	182,922	2019	292 m	MAN - 6S70MC-C	2.2	A
60	RIZOKARPASO IMO 9975478	82,114	2023	229 m	MAN-B&W 5S60ME-C10	2.2	A
63	NAVIOS SAKURA IMO 9951927	182,169	2023	292 m	MAN B&W; 6S70MC-C	2.2	A
62	KSL SANTOS IMO 9719939	181,055	2014	292 m	CSSC - CMD-MAN B&W 6G70ME-C9.2	2.2	A
65	BERGE ISHIZUCHI IMO 9446570	181,458	2011	292 m	MAN - 6S70MC-C	2.3	A
64	NAVIOS ARMONIA IMO 9925813	182,079	2022	292 m	Mitsui Engineering & Shipbuilding C Ltd - Japan 6S70ME-C10	2.3	A
66	FRONTIER ASUKA IMO 9675640	181,370	2014	292 m	Hitachi - 6S70MC-C	2.3	A
67	SECRETARIAT IMO 9699701	181,036	2015	292 m	MAN - 6G70ME-C9	2.3	A
68	AM KIRTI IMO 9832925	180,885	2019	292 m	CSSC - 6G70ME-C9 (Tier III)	2.3	A
69	GENCO DEFENDER IMO 9718210	180,377	2016	292 m	Hyundai - 6G70ME-C9	2.3	A
71	TOMINI K2 IMO 9617519	179,816	2014	292 m	DALIAN MARINE - 6S70ME-C8	2.3	A
70	FRONTIER JASMINE IMO 9933418	182,130	2022	292 m	Mitsui Engineering & Shipbuilding C Ltd - Japan 6G70ME-C9-EGRBP	2.3	A
72	CAPE FALCON IMO 9916202	182,066	2022	292 m	Mitsui - 6G70ME-C9	2.3	A
73	GCL DUNKIRK IMO 9926623	180,953	2022	292 m	CSSC - 6G70ME-C9	2.3	A
75	APOLLONIUS IMO 9718234	180,544	2016	292 m	MAN - 6G70ME-C9	2.3	A
74	PSU NINTH IMO 9735189	209,551	2016	300 m	CSSC - 6G70ME-C9	2.3	A
76	LEMESSOS QUEEN IMO 9959149	82,751	2023	229 m	MAN-B&W 7G50ME-C9	2.3	A
78	GOLDEN CALVUS IMO 9743174	180,521	2018	292 m	CSSC - 6G70ME-C9	2.3	A
77	BERGE SARSTEIN IMO 9774367	182,913	2017	292 m	Hitachi - 6S70ME-C9.5	2.3	A
79	BULK SANTOS IMO 9849772	208,445	2020	300 m	Doosan - 6G70ME-C9 (Tier II)	2.3	A
80	CAPE SWAN IMO 9552381	182,663	2012	292 m	Kawasaki - 6S70MC-C	2.4	A
81	ANDREAS K IMO 9438121	91,873	2009	230 m	MAN - 7S50MC-C	2.4	A
83	PELOREUS IMO 9702534	182,496	2014	292 m	Hitachi - 7S65ME-C	2.4	A
82	FLAG SEAMAN IMO 9605499	176,460	2013	292 m	CSSC - MAN B&W 6S70MC-C	2.4	A
84	AMMOXOSTOS IMO 9961427	82,114	2024	229 m	MAN-B&W 5S60ME-C10	2.4	A
85	MOUNT TROODOS IMO 9402287	181,383	2007	292 m	MAN - 6S70MC-C	2.4	A
86	GRACEOUS IMO 9751119	179,424	2017	292 m	Hyundai - 6G70ME-C9	2.4	A
87	KM OSAKA IMO 9604990	180,652	2012	292 m	Mitsui - 6S70MC-C	2.4	A
88	ROYAL ARGO IMO 9860489	182,883	2020	292 m	MAN - 6S70MC-C	2.4	A
89	GOLDEN CUMULUS IMO 9717400	180,499	2013	292 m	CSSC - 6G70ME-C9	2.4	A
90	GENCO LIBERTY IMO 9718222	180,387	2016	292 m	MAN - 6G70ME-C9	2.4	A
92	STAR SHIBUMI IMO 9921623	182,090	2021	292 m	Hitachi - 7S65ME-C	2.4	A
91	CAPRICORN ONE IMO 9739018	181,319	2015	292 m	MAN - 6S70MC-C	2.4	A
93	ORMOND IMO 9698989	181,060	2015	292 m	MAN - 6G70ME-C9	2.5	A
94	CAPE BUZZARD IMO 9446623	181,399	2011	292 m	Hitachi - 6S70MC-C	2.5	A
96	CAPE ENIGMA IMO 9536791	174,802	2011	290 m	Hitachi - 6S70MC	2.5	A
95	FERAE AUSTRALIS IMO 9869514	187,277	2019	300 m	MAN - 6G70ME-C9	2.5	A
99	CAPRICORN SIGMA IMO 9747962	181,305	2015	292 m	MAN - 6S70MC-C	2.5	A
98	BACON IMO 9639517	205,170	2013	300 m	HHI - 6S70MC-C8.2	2.5	A
97	LOWLANDS SPIRIT IMO 9870161	182,820	2019	292 m	MAN - 6S70MC-C	2.5	A
100	MARAN HOPE IMO 9729178	179,445	2015	292 m	MAN - 6G70ME-C9	2.5	A

Page 2 of 71 — 3,531 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.