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)

#1,924 of 3,436 bulk carriers

CO₂ intensity

4.7 g CO₂/dwt·nm

vs segment average (4.71)

+0% higher

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
1901	JEWEL OF SOHAR IMO 9514107	55,875	2011	190 m	Wärtsilä - 6RT-flex50	4.7	C
1902	DYNAGREEN IMO 9919527	49,480	2022	200 m	Mitsubishi - 6UEC50LSH	4.7	C
1903	IONIAN SEA IMO 9860611	37,705	2019	180 m	MAN - 6S50ME-C8	4.7	C
1904	DAMON IMO 9575187	63,301	2012	200 m	Doosan - 5S60ME-C8	4.7	C
1905	GASTONE IMO 9643295	81,521	2012	229 m	Hyundai - 6S60MC-C	4.7	C
1906	ERMIONE IMO 1020564	41,240	2025	180 m	MAN-B&W 5S50ME-C9	4.7	C
1907	AFRICAN WARBLER IMO 9852717	38,136	2020	180 m	Mitsubishi - 6UEC45LSE-B2	4.7	C
1908	SAN ANTONIO IMO 9514066	55,768	2012	190 m	Diesel United - 6RT-flex50	4.7	C
1909	HAKO IMO 9691814	63,104	2014	200 m	Hudong Heavy Machinery - 5S60ME-C8.1	4.7	C
1910	XIN HAI TONG 20 IMO 9534145	56,753	2009	190 m	STX - 6 S 50 MC-C	4.7	C
1911	SEAHARMONY IMO 9688635	62,770	2015	200 m	MAN - 5S60ME-C8 Tier II	4.7	C
1912	SOHAR IMO 9771030	63,018	2021	200 m	Doosan - 5G60ME-C9	4.7	C
1913	MANDARIN RIVER IMO 9533335	56,774	2011	190 m	MAN - 8S50MC-C	4.7	C
1914	BORDEAUX IMO 9483229	55,621	2011	188 m	MAN - 6S50MC-C	4.7	C
1915	BBG NOVA IMO 9705342	63,313	2016	200 m	MAN - 5G60ME-C9	4.7	C
1916	KOUROS QUEEN IMO 9502855	56,085	2012	190 m	Mitsui - 6S50MC-C	4.7	C
1917	SHARK ISLAND IMO 9520924	58,026	2011	190 m	Mitsui - 7 S 50 MC-C	4.7	C
1918	NORD SANTOS IMO 9926013	42,835	2022	183 m	MAN - 5S50ME-C9	4.7	C
1919	ASTRA N IMO 9476290	55,762	2010	190 m	Wärtsilä - 6RT-flex50	4.7	C
1920	ES WARRIOR IMO 9775854	60,513	2016	200 m	Mitsui - 6G50ME-B9.3 (Tier II)	4.7	C
1921	FU XIANG IMO 9603465	58,758	2012	197 m	Dalian 6S50MC-C	4.7	C
1922	LUCKY ALISA IMO 9254525	75,318	2003	225 m	Hitachi - 6S60MC	4.7	C
1923	ARIADNE IMO 9492907	57,893	2013	190 m	Mitsui - 6S50MC-C-MKVII	4.7	C
1924	ASTORIA IMO 9663635	63,353	2013	200 m	Doosan - 5S60ME-C8	4.7	C
1925	OCEANUS IMO 9670925	63,385	2015	200 m	MAN - 5S60ME-C8	4.7	C
1926	PRINCESS MARGO IMO 9720017	63,342	2015	200 m	MAN - 5S60ME-C8 Tier II	4.7	C
1927	CRIMSON DELIGHT IMO 9732163	57,955	2015	190 m	Mitsui - 6S50ME-B9	4.7	C
1928	THOR MERCURY IMO 9300221	55,862	2005	190 m	MAN - 6S50MC-C	4.7	C
1929	PACIFIC FRIEDA IMO 9274939	52,498	2005	190 m	Mitsui - 6S50MC	4.7	C
1930	AQUARIUS IMO 9634438	56,048	2013	190 m	Mitsui - 6S50MC-C	4.7	C
1931	INTEGRITY MAKOTO IMO 9977933	39,583	2024	180 m	MAN-B&W 6G45ME-C9	4.7	C
1932	WADI ALARAB IMO 9107681	64,214	1995	225 m	6S50MC	4.7	C
1933	COMMON SPIRIT IMO 9594717	57,078	2011	190 m	MAN - 6S50MC-MKVII	4.7	C
1934	KING WIN IMO 9590230	56,809	2012	190 m	STX - 6 S 50 MC-C	4.7	C
1935	FALCON KIZUNA IMO 1032000	39,544	2025	180 m	MAN-B&W 6G45ME-C9	4.7	C
1936	GHALA IMO 9687069	50,409	2013	183 m	Mitsui - 6S50MC-C	4.7	C
1937	LIBERTY IMO 9423542	58,679	2009	190 m	Mitsui - 6S50MC-C	4.7	C
1938	OKOLCHITSA IMO 9841653	47,087	2020	190 m	MAN - 5G50ME-C9	4.7	C
1939	ALBION BAY IMO 9496989	58,755	2011	197 m	MAN - 6S50MC-C	4.7	C
1940	FUTURE IMO 9566447	56,128	2012	190 m	MAN - 6S50MC-C	4.7	C
1941	CIELO DI IYO IMO 9808340	37,204	2017	183 m	Mitsui - 5S50ME-C9	4.7	C
1942	VEZHEN IMO 9937270	32,196	2022	190 m	Dalian Marine Diesel Works 5G45ME-C9-ISCR	4.7	C
1943	TRIGON TRADER IMO 9863845	63,666	2021	200 m	MAN - 6S50ME-C9 (Tier II)	4.7	C
1944	KARDAM IMO 9474668	56,536	2012	190 m	MAN - 6S50MC-C	4.7	C
1945	CURIA IMO 9710048	57,559	2015	190 m	MAN - 7S50ME-B9	4.7	C
1946	GURNET BAY IMO 9667045	35,761	2019	180 m	Doosan - 5S50ME-B9	4.7	C
1947	ANYA IMO 9730268	58,593	2017	190 m	Jiangsu Antai Power Co. Ltd. 5S60ME-C8	4.7	C
1948	LUFFY IMO 9609249	58,051	2012	190 m	Mitsui - 6S50MC-CMKVIII	4.7	C
1949	DESERT HARRIER IMO 9756626	60,447	2017	200 m	Mitsui - 6S50ME-B9	4.7	C
1950	CHIOS SUNRISE IMO 9639907	56,589	2013	190 m	Hyundai - 6S50MC-C8	4.7	C

Page 39 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.