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)

#1,969 of 3,531 bulk carriers

CO₂ intensity

4.8 g CO₂/dwt·nm

vs segment average (4.87)

-1% 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
1951	AMOY CENTURY IMO 9797008	61,438	2017	200 m	Hudong Heavy Machinery - 6S50ME-B9	4.8	C
1952	ANNA S IMO 9207778	75,942	2001	225 m	6S60MC	4.8	C
1953	SHIPKA IMO 9937282	32,198	2022	190 m	Dalian Marine Diesel Works 5G45ME-C9	4.8	C
1954	IONIC SMYRNI IMO 9638070	56,025	2013	190 m	Mitsui - 6S50MC-C	4.8	C
1955	GIEWONT IMO 9452593	79,649	2010	229 m	MAN - 7S50MC-C	4.8	C
1956	YASA LOTUS IMO 9955624	40,282	2023	180 m	MAN - 5S50ME-C9	4.8	C
1957	ALBERTA IMO 9729568	62,958	2016	200 m	5S60ME-C8.2-TII	4.8	C
1958	MARINA S IMO 9270919	32,723	2004	177 m	Mitsubishi - 6UEC52LA	4.8	C
1959	THOR MENELAUS IMO 9303924	55,710	2006	190 m	Mitsubishi - 6S50MC-C	4.8	C
1960	FEDERAL BISCAY IMO 9697856	34,564	2015	200 m	MAN - 6S46MC-C	4.8	C
1961	KIRAN ISTANBUL IMO 9576973	63,610	2013	200 m	MAN - 6S60MC	4.8	C
1962	GENCO AQUITAINE IMO 9490624	58,000	2009	190 m	Doosan - 6S50MC-C	4.8	C
1963	MYKONOS DAWN IMO 9762481	37,880	2017	181 m	Hudong Heavy Machinery - 5S50ME-B9	4.8	C
1964	ANNIKA N IMO 9514054	55,768	2011	190 m	Wärtsilä - 6RT-flex50	4.8	C
1965	DENSA DOLPHIN IMO 9403190	58,772	2006	190 m	Mitsui - 6S50MC-C	4.8	C
1966	ICE II IMO 9401362	75,726	2008	225 m	MAN - 5S60MC-C	4.8	C
1967	BULK COLOMBIA IMO 9426245	57,937	2011	190 m	Mitsui - 6S50MC-C	4.8	C
1968	EFE BOSPHORUS IMO 9710505	64,000	2016	200 m	Hudong Heavy Machinery - 5S60ME-C8	4.8	C
1969	THE WISE IMO 9318606	73,593	2007	225 m	Hudong Heavy Machinery - 5S60MC MK6	4.8	C
1970	TOMINI KAIMAI IMO 9709269	38,763	2016	180 m	Wärtsilä - 6RTA48TD-1 Tier II compliant	4.8	C
1971	JULIA IMO 9820702	37,449	2018	180 m	MAN - 5S50MC-C8	4.8	C
1972	SKYFALL IMO 9724752	63,057	2016	200 m	MAN - 5G60ME-C9	4.8	C
1973	YANGZE 8 IMO 9725732	63,515	2014	200 m	Wärtsilä - 5RT-flex58T	4.8	C
1974	ASL TIA IMO 9573713	63,301	2012	200 m	Doosan - 5S60ME-C8.1 Tier II	4.8	C
1975	HANSA NAREE IMO 9738674	39,989	2018	180 m	Yichang - 5S50ME-B9	4.8	C
1976	SKIATHOS IMO 9497402	79,412	2011	229 m	MAN - 7S50MC-C8	4.8	C
1977	JABAL HAFIT IMO 9735804	63,369	2015	200 m	Jiangsu Antai Power Co. Ltd. 5S60ME-C8	4.9	C
1978	WOOYANG HERMES IMO 9421257	54,296	2008	190 m	Hyundai - 6S50MC-C MK7	4.9	C
1979	AN CHANG IMO 9407861	55,217	2009	190 m	MAN - 6S50MC-C	4.9	C
1980	ANTWERP EAGLE IMO 9699036	63,531	2015	200 m	MAN - 5S60ME-C8	4.9	C
1981	PANORIA IMO 9480930	53,514	2008	190 m	Mitsui - 6S50MC-C	4.9	C
1982	CPT DIMITRIOS S IMO 9221592	74,133	2001	225 m	Hitachi - 7S50MC-C	4.9	C
1983	YASA KAPTAN ERBIL IMO 9514341	56,169	2010	190 m	Mitsui - 6S50MC-C	4.9	C
1984	PYTHIAS IMO 9490703	58,018	2010	190 m	Doosan - 6S50MC-C	4.9	C
1985	VALENTIN BUTUZOV IMO 9707651	63,516	2015	200 m	MAN - 5S60ME-C8	4.9	C
1986	COLUMBIA IMO 9423530	58,701	2009	190 m	Mitsui - 6S50MC-C	4.9	C
1987	AFRICAN QUAIL IMO 9738741	37,701	2015	180 m	MAKITA - 6S46MC-C	4.9	C
1988	OCEANLADY IMO 9641364	56,715	2013	190 m	Hudong Heavy Machinery - 6S50MC-C8	4.9	C
1989	FORTUNE EXPRESS IMO 9181728	30,109	1998	170 m	Hitachi - 5S50MC	4.9	C
1990	FENG MAO HAI IMO 9747510	63,413	2017	200 m	Hudong Heavy Machinery - 5S60ME-C8	4.9	C
1991	TAC DAYTONA IMO 9932115	40,217	2022	180 m	MAN - 5S50ME-C9	4.9	C
1992	CORAL ISLAND IMO 9304112	55,699	2006	190 m	MAN - 6S50MC-C	4.9	C
1993	MITSOS IMO 9637210	63,526	2013	200 m	Hyundai - 5S60ME-C8.2 (Tier II)	4.9	C
1994	XING SHOU HAI IMO 9760081	60,492	2016	200 m	Mitsui - 6S50ME-B9	4.9	C
1995	SEA GOAT IMO 1014606	40,255	2024	183 m	J-ENG 6UEC42LSH-EcoD3	4.9	C
1996	DYNA FLORESTA IMO 9901805	52,804	2022	210 m	Mitsubishi - 7UEC50LSII	4.9	C
1997	AMIS ELEGANCE IMO 9705421	55,404	2015	190 m	Kawasaki - 6S50ME-B8.3-TII	4.9	C
1998	PUNTA IMO 9606118	52,000	2013	190 m	ULJANIK - 6S50MC-C	4.9	C
1999	INTEGRITY AOI IMO 9951812	37,300	—	180 m	MAN - 6S46ME-B8	4.9	C
2000	KARDAM IMO 9474668	56,536	2012	190 m	MAN - 6S50MC-C	4.9	C

Page 40 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.