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)

#62 of 3,436 bulk carriers

CO₂ intensity

2.3 g CO₂/dwt·nm

vs segment average (4.71)

-51% 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
53	MAX WARRIOR IMO 9600425	205,361	2014	300 m	MAN - 6S70MC-C	2.3	A
52	CAPE SUN IMO 9953573	182,436	2023	292 m	MAN-B&W 7S65ME-C	2.3	A
51	UNITED GRACE IMO 9870147	182,922	2019	292 m	MAN - 6S70MC-C	2.3	A
54	KYRA THALEIA IMO 9375915	81,383	2009	225 m	MAN - 7S50MC-C	2.3	A
56	SHANDONG DREAM IMO 9907952	207,996	2021	300 m	Dalian Marine Diesel Co Ltd - China 6G70ME-C10-HPSCR	2.3	A
55	UNITED ETERNITY IMO 9802102	182,859	2017	292 m	Mitsui - 6G70ME-C9.5	2.3	A
57	CSK GENERATION IMO 9736949	182,618	2016	292 m	Hitachi - 7S65ME-C8.2	2.3	A
58	DODO IMO 9336024	176,760	2006	289 m	Mitsui - 6S70MC-MKVI	2.3	A
59	RTM DRAKE IMO 9591351	205,437	2013	300 m	MAN - 6S70MC-C	2.3	A
61	CAPE PEREGRINE IMO 9500754	180,643	2012	292 m	MAN - 7S65ME-C	2.3	A
60	CAPE CAMELLIA IMO 9531856	206,400	2013	300 m	Mitsui - 6S80MC	2.3	A
62	MINERAL KEVIN IMO 9683271	180,958	2014	292 m	CSSC - 6G70ME-C9.2	2.3	A
63	BERGE MCCLINTOCK IMO 9590852	181,458	2011	292 m	Mitsui - 6S70MC-C	2.3	A
64	BERGE TOWNSEND IMO 9567063	175,588	2012	292 m	Hitachi - MAN-B&W 6S70MC	2.3	A
65	CAPE DISCOVERY IMO 9851294	208,603	2019	300 m	MAN - 6G70ME-C9	2.3	A
66	GOOD HORIZON IMO 9767089	182,342	2017	292 m	Mitsui - 6G70ME-C9.5 (Tier II)	2.4	A
69	TRUE CHARIOT IMO 9726774	182,571	2015	292 m	MAN - 6S60ME-C	2.4	A
68	STAR ASIA IMO 9715490	181,056	2017	292 m	CSSC - 6G70ME-C9	2.4	A
67	LEMESSOS QUEEN IMO 9959149	82,751	2023	229 m	MAN-B&W 7G50ME-C9	2.4	A
71	BERGE ISHIZUCHI IMO 9446570	181,458	2011	292 m	MAN - 6S70MC-C	2.4	A
70	CAPE AQUA IMO 9538402	178,055	2009	292 m	HUDONG HEAVY MACHINERY 6S70MC6	2.4	A
72	BO MAY IMO 9980186	182,317	2025	292 m	Mitsui E&S DU Co Ltd 7G60ME-C10-EGRBP	2.4	A
73	LUCY OLDENDORFF IMO 9691553	181,380	2008	292 m	MAN - 6S70MC-C	2.4	A
74	OU MAY IMO 9751016	180,003	2017	295 m	DALIAN MARINE - 6G70ME-C9	2.4	A
77	CAPRICORN ONE IMO 9739018	181,319	2015	292 m	MAN - 6S70MC-C	2.4	A
76	HAUKE OLDENDORFF IMO 9871115	208,000	2022	300 m	MAN - 6G70ME-C9	2.4	A
75	PACIFIC SARAH IMO 9835886	180,999	2019	292 m	6G70ME-C9.2	2.4	A
78	SECRETARIAT IMO 9699701	181,036	2015	292 m	MAN - 6G70ME-C9	2.4	A
79	CAPE IRIS IMO 9563689	181,403	2012	292 m	Mitsui - 6S70MC-C	2.4	A
80	APOLLONIUS IMO 9718234	180,544	2016	292 m	MAN - 6G70ME-C9	2.4	A
83	NAVIOS CORALI IMO 9747948	181,088	2015	292 m	MAN - 6S70MC-C	2.4	A
82	BERGE HOVERLA IMO 9497359	175,918	2010	292 m	Hitachi - 6S70MC (MK6)	2.4	A
81	TOPEKA IMO 9721671	179,548	2015	295 m	DALIAN MARINE - 6G70ME-C9	2.4	A
84	GH KAHLO IMO 9617521	179,816	2014	290 m	DALIAN MARINE - 6S70ME-C8	2.4	A
85	BERGE ROSA IMO 9346378	180,230	2006	289 m	MAN - 6S70MC-C	2.5	A
88	PACIFIC MYRA IMO 9835898	181,060	2019	292 m	MAN - 6G70ME-C9	2.5	A
87	MOUNT TROODOS IMO 9402287	181,383	2007	292 m	MAN - 6S70MC-C	2.5	A
86	BERGE TRIGLAV IMO 9572666	175,885	2010	292 m	HHI - HHI- MAN-B&W 6S70MC6	2.5	A
92	SKYTHIA IMO 9423920	177,830	2010	292 m	MAN - 6S70MC	2.5	A
91	JSW SALEM IMO 9537721	176,217	2012	292 m	CSSC - 6S70MC	2.5	A
90	INDIAN FRIENDSHIP IMO 9521394	181,125	2013	292 m	MAN - 6S80MC-C	2.5	A
89	KM OSAKA IMO 9604990	180,652	2012	292 m	Mitsui - 6S70MC-C	2.5	A
97	NAVIOS MARS IMO 9747950	181,259	2016	292 m	Mitsui - 6S70MC-C	2.5	A
98	CS NAN JING IMO 9874698	179,668	2021	292 m	MAN - 6G70ME-C10	2.5	A
96	CAPE OWL IMO 9729219	179,510	2016	292 m	MAN - 6G70ME-C9	2.5	A
93	SQUIRESHIP IMO 9391646	170,000	2010	287 m	Hyundai - 6S70MC	2.5	A
95	CS HANG ZHOU IMO 9874703	180,000	2015	292 m	MAN - 6G70ME-C10	2.5	A
94	STAR DRAGON IMO 9508392	178,062	2008	292 m	MAN - 6S70MC	2.5	A
99	CS JI NAN IMO 9874686	179,606	2021	295 m	MAN - 6G70ME-C10	2.5	A
100	CAPE PEONY IMO 9425447	181,325	2012	292 m	Mitsui - 6S70MC-C	2.5	A

Page 2 of 69 — 3,436 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 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.