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)

#1,521 of 3,436 bulk carriers

CO₂ intensity

4.2 g CO₂/dwt·nm

vs segment average (4.71)

-10% 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
1501	SDTR ERICA IMO 9877872	85,000	2021	227 m	UnKnown 6S60ME-C8-HPSCR	4.2	C
1504	JIN XIA FENG IMO 9611711	81,536	2014	229 m	MAN - 7S50MC-C	4.2	C
1503	TREASURE STAR IMO 9461154	82,206	2010	229 m	Mitsui - 7 S 50 MC-C	4.2	C
1502	FEDERAL PRESTIGE IMO 9942196	42,701	2023	183 m	MAN-B&W 5S50ME-C9	4.2	C
1508	ESMERALDA IMO 9430856	55,582	2009	190 m	Mitsui - 6S50MC-C7.1TII	4.2	C
1507	CAPTAIN SITARAS IMO 9553713	61,000	2022	200 m	MAN - 6S50ME-B9	4.2	C
1509	MIDJUR IMO 9835771	47,070	2019	190 m	MAN - 5G50ME-C9	4.2	C
1506	C.S. COSMOS IMO 1023736	39,841	2024	180 m	J-ENG 6UEC42LSH-EcoD4	4.2	C
1505	STAR STONINGTON IMO 9575151	63,301	2012	200 m	MAN - 5S60ME-C8	4.2	C
1510	WADI SAFAGA IMO 9460734	80,443	2010	229 m	STX - 7 S 50 MC-C	4.2	C
1511	SEA TREASURE IMO 9885427	61,192	2020	200 m	MAN - 6S50ME-B9	4.2	C
1513	ASTRO GRUMIUM IMO 9714719	61,305	2015	200 m	Hitachi - 6S50ME-B9	4.2	C
1512	ONE ENERGY IMO 9592123	81,076	2011	229 m	MAN - 7S50MC	4.2	C
1517	AKSON MEISA IMO 9446192	56,956	2010	190 m	STX - 6 S 50 MC-C	4.2	C
1516	CEMTEX INNOVATION IMO 9593048	81,326	2013	229 m	MAN - 7S50MC-C	4.2	C
1515	XIN YU IMO 9244362	74,090	2001	225 m	7S50MC-MKVI	4.2	C
1514	ARUNA HULYA IMO 9635391	55,582	2012	188 m	Hyundai - 6S50MC-C8	4.2	C
1520	MAJESTIC STAR IMO 9865568	81,878	2020	229 m	MAN - 6S60ME-C8	4.2	C
1519	GW ELENI IMO 9874648	63,538	2020	200 m	MAN - 5S60ME-C8	4.2	C
1518	ARCOLA IMO 9932361	63,142	2022	200 m	UnKnown 5S60MC-C8.2	4.2	C
1532	SPRING RAINBOW IMO 9666041	63,234	2014	200 m	Wärtsilä - 5RT-flex58T	4.2	C
1533	MERGANSER IMO 9959084	39,971	2023	183 m	MAN-B&W 6S46ME-B8	4.2	C
1528	PREMIERSHIP IMO 9398747	170,024	2006	287 m	Hyundai - 6S70MC	4.2	C
1531	BRILLIANT VENUS IMO 9326392	106,482	2008	255 m	Kawasaki - 6S60MC	4.2	C
1530	APHROS IMO 9460514	56,108	2013	190 m	MAN - 6S50MC-C	4.2	C
1529	ZALIV IMO 9935806	61,146	2022	200 m	Hudong Heavy Machinery - 6S50ME-B9	4.2	C
1527	ANGELE N IMO 9509528	55,804	2010	190 m	Diesel United - 6RT-flex50	4.2	C
1526	MICHALIS SAN IMO 9648879	55,782	2013	190 m	DU 6RT-flex50	4.2	C
1525	STAR VALENCIA IMO 9699311	63,556	2015	200 m	MAN - 5S60ME-C8	4.2	C
1524	TEGEA IMO 9478937	55,616	2011	190 m	MAN - 6S50MC-C	4.2	C
1523	THEMIS IMO 9452543	58,486	2007	196 m	Doosan - 6S50MC-C MK8	4.2	C
1522	TAI SPLENDOR IMO 9727132	60,618	2015	200 m	MAN - 6S50MC-C	4.2	C
1521	UNION TRADER IMO 9445710	57,700	2010	190 m	STX - 6 S 50 MC-C	4.2	C
1534	YEOMAN BRIDGE IMO 8912302	96,772	1991	250 m	6S70MC	4.2	C
1539	PAN TOPAZ IMO 9625827	82,784	2012	229 m	MAN - 6S60MC-C	4.2	C
1540	KHADEEJAH JAHAN II IMO 9407536	55,486	2009	190 m	MAN - 6S50MC-C	4.2	C
1538	XI HU IMO 9707704	63,519	2019	200 m	STX - 5S60MC-C8	4.2	C
1545	FATEMA JAHAN II IMO 9425772	58,096	2010	190 m	Mitsui - 6S50MC-C	4.2	C
1544	AERIKO IMO 9681546	63,500	2013	200 m	STX - 5S60ME-C8 Tier II	4.2	C
1541	CHRYSANTHE IMO 9497086	32,500	2011	177 m	STX - 6S42MC	4.2	C
1537	MISTRAL I IMO 9650860	81,813	2013	229 m	Doosan - 5S60MC-C8	4.2	C
1543	CAPTAIN LEONARD IMO 9425887	58,091	2010	190 m	Mitsui - 6S50MC-C	4.2	C
1542	TOMINI KAIMAI IMO 9709269	38,763	2016	180 m	Wärtsilä - 6RTA48TD-1 Tier II compliant	4.2	C
1536	VERBIER IMO 9529619	71,066	2012	210 m	Mitsubishi - 7UEC50LSII	4.2	C
1535	AURORA IMO 9537630	79,607	2010	229 m	Hyundai - 7 S 50 MC-C 7	4.2	C
1550	STAR VANCOUVER IMO 9855850	63,614	2020	200 m	DALIAN MARINE - 5S60ME-C8	4.2	C
1549	NEW ENDEAVOR IMO 9579638	80,536	2011	229 m	MAN - 7S50MC-C	4.2	C
1548	NING YUE HAI IMO 9751339	63,561	2017	200 m	Hudong Heavy Machinery - 5S60ME-C8	4.2	C
1547	GREAT FAITH IMO 9792905	38,629	2018	180 m	Wärtsilä - 5RT-flex50D	4.2	C
1546	KENNADI IMO 9703576	63,262	2016	200 m	MAN - 5S60ME-C8	4.2	C

Page 31 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.