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)

#1,255 of 3,436 bulk carriers

CO₂ intensity

4.0 g CO₂/dwt·nm

vs segment average (4.71)

-16% 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
1251	PEACE GEM IMO 9663348	76,433	2012	225 m	STX - 5S60MC-C	4.0	B
1250	MONTEVIDEO I IMO 9935818	61,130	2022	200 m	Hudong Heavy Machinery - 6S50ME-B9	4.0	B
1254	ZHENG JUN IMO 9593804	81,810	2013	229 m	MAN - 5S60ME-C	4.0	B
1253	AH UNION IMO 9272917	76,602	2003	225 m	Mitsui - 6S60MC	4.0	B
1256	TON HIL II IMO 9643180	56,047	2014	190 m	Mitsui - 6S50MC-C	4.0	B
1255	NKR ALICE IMO 9914515	61,217	2022	200 m	Hudong Heavy Machinery - 6S50ME-B9	4.0	B
1257	SEA DIAMOND I IMO 9364825	53,483	2006	190 m	Mitsui - 6S50MC-C	4.0	B
1260	ULTRA INCAHUASI IMO 9853084	62,435	2020	200 m	MAN - 6S50ME-B9	4.0	B
1265	LA STELLA IMO 9748368	61,286	2012	200 m	Hyundai - 6S50MC-C8	4.0	B
1259	LOWLANDS HOPE IMO 9727182	60,063	2016	200 m	Kawasaki - 6S50ME-B9	4.0	B
1267	GENCO HORNET IMO 9721932	63,574	2014	200 m	MAN - 5S60ME-C8	4.0	B
1266	CASTOR IMO 9370197	78,888	2008	225 m	MAN - 7S50MC-C	4.0	B
1258	MARO MARO IMO 9553725	61,143	2022	200 m	MAN - 6S50ME-B9	4.0	B
1263	SYLVIA IMO 9471264	80,700	2010	229 m	MAN - 7S50MC-C	4.0	B
1262	SAGAR SAMRAT IMO 9727041	76,404	2015	225 m	MAN - 6S50MC-C	4.0	B
1261	PACIFIC DIVA IMO 9883106	63,667	2020	200 m	MAN - 6S50ME-B9	4.0	B
1264	MH ADAGIO IMO 9916977	61,206	2022	200 m	MAN - 6S50ME-B9	4.0	B
1275	W-ACE IMO 9484687	93,015	2011	229 m	HHI - 6S60MC-C7	4.0	B
1277	PANASIATIC IMO 9310276	82,962	2005	229 m	MAN - 7S50MC	4.0	B
1274	ELIM JOYCE IMO 9340506	58,790	2007	190 m	Mitsui - 6S50MC-C7.1	4.0	B
1273	TRAVERSE ANTWERP IMO 9330317	77,075	2005	225 m	Hitachi - 6S60MC-MKVI	4.0	B
1272	ELENI IMO 9411525	86,949	2008	229 m	Diesel United - 6RTA58T	4.0	B
1271	EVER BEST IMO 9607837	81,717	2013	229 m	Dalian 5RT-flex58T	4.0	B
1270	CANOPUS IMO 9843443	80,992	2021	229 m	Doosan - 6S60ME-C8 (Tier II)	4.0	B
1269	YEOMAN BONTRUP IMO 8912297	96,772	1991	250 m	6S70MC	4.0	B
1268	FJ STAR IMO 9797682	61,225	2016	200 m	Mitsui - 6S50ME-B9.5	4.0	B
1276	ZHENG HUI IMO 9596105	81,797	2014	229 m	MAN - 5S60ME-C	4.0	B
1280	GLORIA IMO 9313307	82,464	2011	225 m	Kawasaki - 6S60MC-C	4.0	B
1279	FEDERAL OSAKA IMO 9853436	60,467	2020	200 m	Mitsui - 6S50ME-B9 (Tier II)	4.0	B
1278	ALEXANDROS PETRAKIS IMO 9442938	76,596	2008	225 m	MAN - 6S60MC	4.0	B
1283	GW MATHILDE IMO 9874650	63,592	2020	200 m	MAN - 5S60ME-C8	4.0	B
1282	HONG JING IMO 9363649	82,354	2008	225 m	MAN - 5S60MC-C	4.0	B
1281	ALLIANCE IMO 9552824	83,369	2010	229 m	Kawasaki - 6S60MC-C	4.0	B
1286	ARIES KARIN IMO 9894478	64,229	2021	200 m	MAN - 6S50ME-C9	4.0	B
1288	DE XIN HAI IMO 9364758	76,431	2008	225 m	Hudong Heavy Machinery - 5S60MC	4.0	B
1287	GENCO MARY IMO 9923205	61,085	2022	200 m	Hudong Heavy Machinery - 6S50ME-B9	4.0	B
1285	KERKYRA IMO 9607162	81,375	2012	229 m	Hyundai - 6S60ME-C	4.0	B
1284	GUO QIANG 8 IMO 9722065	63,376	2018	200 m	Hudong Heavy Machinery - 5S60ME-C8.2 (Tier II)	4.0	B
1294	LAURA IMO 9700665	63,399	2015	200 m	Doosan - 5S60ME-C8	4.0	B
1292	BERGE YOTEI IMO 9866691	63,511	2020	200 m	MAN - 6S50ME-B9.3	4.0	B
1293	MENARO IMO 9718002	81,061	2016	229 m	MAN - 6S60ME-C8	4.0	B
1291	CHRISTINA V IMO 9760055	66,653	2018	200 m	Mitsui - 7S50ME-B9.3 Tier II	4.0	B
1290	LU XIANG IMO 9407524	55,429	2009	190 m	MAN - 6S50MC-C	4.0	B
1289	INDIAN HARMONY IMO 9626651	75,385	2013	225 m	MAN - 6S60ME-C8	4.0	B
1300	FAMIGLIA IMO 9979199	63,425	2023	200 m	MAN-B&W 6S50ME-C9	4.0	B
1299	WORLD PRIZE IMO 9860403	62,496	2021	200 m	Mitsui - 5S50ME-B9	4.0	B
1298	IOKASTI GS IMO 9748722	55,857	2016	190 m	Kawasaki - 6S50MC-C8	4.0	B
1297	VELOS STAR IMO 9728124	81,846	2015	229 m	MAN - 6S60ME-C	4.0	B
1296	FARMER IMO 9589267	81,541	2012	229 m	Doosan - 6S60MC-C	4.0	B
1295	ZHENG KAI IMO 9593787	81,877	2012	229 m	MAN - 5S60ME-C	4.0	B

Page 26 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.