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)

#1,173 of 3,436 bulk carriers

CO₂ intensity

3.9 g CO₂/dwt·nm

vs segment average (4.71)

-17% 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
1147	SSI VIGILANT IMO 9918743	63,861	2022	200 m	MAN - 6G50ME-C9	3.9	B
1146	CHLOE IMO 9749910	81,629	2014	229 m	MAN - 6S60ME-C8	3.9	B
1153	OCEAN GLSR IMO 9529516	56,108	2014	190 m	Kawasaki - 6S50ME-C8.2	3.9	B
1157	GCL GREECE IMO 9906477	82,299	2021	229 m	MAN - 6S60ME-C8	3.9	B
1159	FEDERAL PASSION IMO 9926049	42,692	2022	183 m	MAN - 5S50ME-C9	3.9	B
1156	SUDESTADA IMO 9426087	93,274	2010	229 m	Wärtsilä - MAN 6S60MC-C	3.9	B
1162	TARIEL IMO 9231303	76,623	2001	225 m	Mitsui - 6S60MC	3.9	B
1161	CL ZHANJIANG IMO 9977359	64,765	2024	200 m	MAN-B&W 6S50ME-C9	3.9	B
1160	MINOAN GLORY IMO 9364447	74,748	2006	225 m	Hudong Heavy Machinery - 5S60MC	3.9	B
1155	TOKYO PIONEER IMO 9856294	63,686	2020	200 m	MAN - 6S50ME-C9	3.9	B
1154	SUMMER SKY IMO 9790830	63,415	2017	200 m	Hitachi - 6S50ME-B9	3.9	B
1158	MH ARPEGGIO IMO 9916965	61,236	2022	200 m	MAN - 6S50ME-B9	3.9	B
1163	KARO T IMO 9942108	63,520	2023	200 m	MAN-B&W 6S50ME-C9	3.9	B
1166	AXION ESTI IMO 1025928	63,928	2025	200 m	MAN-B&W 6G50ME-C9	3.9	B
1165	GREAT ZHOU IMO 9766932	64,794	2017	200 m	Kawasaki - 6G50ME-B9.3	3.9	B
1164	RG ATHENA IMO 9314648	82,282	2007	225 m	Kawasaki - 5S60MC-C	3.9	B
1170	STAR HAMBURG IMO 9698587	63,800	2014	200 m	Hudong Heavy Machinery - 5S60ME-C8	3.9	B
1169	STAR COPENHAGEN IMO 9699359	63,495	2015	200 m	MAN - 5S60ME-C8	3.9	B
1172	STAR SINGAPORE IMO 9788100	63,386	2017	200 m	Hudong Heavy Machinery - 5S60ME-C8 Tier II	3.9	B
1168	GUO YUAN 32 IMO 9591480	75,806	2013	225 m	Wärtsilä - 5RT-flex58T	3.9	B
1171	EQUINOX MELIDA IMO 9914503	61,211	2020	200 m	Hudong Heavy Machinery - 6S50ME-B9	3.9	B
1167	PENELOPE I IMO 9762601	81,835	2017	229 m	CSSC - 6S60ME-C8	3.9	B
1174	STAR MONICA IMO 9715842	60,935	2015	198 m	MAN - 6S50ME-B9	3.9	B
1173	STEFANOS IMO 9719575	81,237	2017	229 m	Hudong Heavy Machinery - 6S60ME-C8	3.9	B
1177	ALLIS SERENE IMO 9425851	58,098	2011	190 m	Mitsui - 6S50MC-C	3.9	B
1185	THEMIS IMO 9594913	81,963	2012	229 m	Wärtsilä - 5RT-flex58T	3.9	B
1176	MEDI ZUOZ IMO 9789910	61,175	2013	200 m	Japan Engine Corporation (J-ENG) 6S50MC-C	3.9	B
1186	PROPEL GRACE IMO 9605023	61,439	2012	200 m	Mitsui - 6S50MC-C8	3.9	B
1175	BELMONTE IMO 9687124	81,261	2014	225 m	Kawasaki - 5S60MC-C	3.9	B
1183	CHAILEASE BRIGHT IMO 9642485	76,249	2012	225 m	MAN - 5S60MC-C	3.9	B
1182	PEACEFUL SEAS IMO 9707584	63,350	2014	200 m	Hudong Heavy Machinery - 5S60ME-C8 Tier II	3.9	B
1181	KMAX LEADER IMO 9477414	91,827	2010	230 m	STX - 7 S 50 MC-C	3.9	B
1180	DESERT FAITH IMO 9942067	63,675	2023	200 m	Mitsui E&S Machinery Co., Ltd. Tamano Machinery Factory	3.9	B
1179	ARMERIA IMO 1041245	64,670	2025	200 m	MAN-B&W 6S50ME-C9	3.9	B
1178	ASTARTE IMO 9600645	81,513	2013	229 m	Doosan - MAN 6S60MC-C8	3.9	B
1184	PAN HARVEST IMO 9699335	63,577	2015	200 m	MAN - 5S60ME-C8	3.9	B
1200	HONG YUAN IMO 9500883	76,573	2009	225 m	Hudong Heavy Machinery - 5S60MC	3.9	B
1198	ADS ARENDAL IMO 9652507	82,908	2013	229 m	Mitsui - 6S60MC-C8.2	3.9	B
1197	SIKINOS IMO 9967639	63,615	2023	200 m	STX Heavy Industries Co Ltd - Changwon 6G50ME-C9-HPSCR	3.9	B
1196	ASTREA IMO 9705366	81,838	2015	229 m	Mitsui - 6S60ME-C8.2	3.9	B
1195	MARKET PORTER IMO 9852913	61,208	2015	200 m	Hudong Heavy Machinery - 6S50ME-B9	3.9	B
1194	MAGIC ARIEL IMO 9855599	81,054	2020	229 m	Yichang - 6S60ME-C8	3.9	B
1193	NISSAKI IMO 9611515	81,466	2013	229 m	MAN - 6S60MC	3.9	B
1192	HORIZON DIAMOND IMO 9579066	76,048	2011	225 m	Hudong Heavy Machinery - 5S60MC-C	3.9	B
1191	BELTANGO IMO 9874284	64,061	2020	200 m	Mitsui - 6S50ME-B9	3.9	B
1190	LOWLANDS ISLAND IMO 9984534	63,739	2023	200 m	MAN-B&W 6S50ME-C9	3.9	B
1189	ANDERMATT IMO 9738791	77,113	2015	225 m	Mitsui - 6S60MC	3.9	B
1199	PHOENIX IMO 9609160	81,569	2012	229 m	Hudong Heavy Machinery - 5S60MC-C	3.9	B
1188	NEARCHOS IMO 9852030	61,148	2019	200 m	MAN - 6S50ME-B9	3.9	B
1187	APJ PRIYA 2 IMO 9361196	82,298	2006	229 m	Mitsui - 7 S 50 MC-C	3.9	B

Page 24 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.