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)

#2,210 of 3,531 bulk carriers

CO₂ intensity

5.2 g CO₂/dwt·nm

vs segment average (4.87)

+6% 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

3,604

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
2201	ASTORIA IMO 9663635	63,353	2013	200 m	Doosan - 5S60ME-C8	5.2	D
2202	ASH ATLANTIC IMO 9470844	28,352	2008	169 m	MAKITA - 6S42MC	5.2	D
2203	COMMON SPIRIT IMO 9594717	57,078	2011	190 m	MAN - 6S50MC-MKVII	5.2	D
2204	BULGARIA IMO 9968475	45,174	2024	190 m	MAN-B&W 5G50ME-C9	5.2	D
2205	LEON IMO 9303871	55,730	2006	190 m	Mitsui - 6S50MC-C	5.2	D
2206	BETTY IMO 9522881	36,892	2011	186 m	MAN - 6S46MC-C	5.2	D
2207	KLIMA IMO 9594561	57,000	2013	190 m	Doosan - 6S50MC-C	5.2	D
2208	FEDERAL DELTA IMO 9805271	34,492	2018	200 m	Kawasaki - 5S50ME-B9	5.2	D
2209	RUGULUS I IMO 9288332	55,426	2004	190 m	6S50MC-C	5.2	D
2210	ARNICA IMO 9514418	56,106	2010	190 m	Mitsui - 6S50MC-C	5.2	D
2211	EVA GLOBAL IMO 9972452	40,553	2023	180 m	China Shipbuilding Industry Co Diesel Engine Co Ltd 5S50ME-C9-HPSCR	5.2	D
2212	CHRISTIANNA IMO 9596703	81,755	2012	229 m	MAN - 7S50MC-C	5.2	D
2213	RICARDA IMO 9693329	39,949	2015	180 m	Wärtsilä - 5RT-flex50	5.2	D
2214	FRIEDRICH SCHULTE IMO 9841940	39,851	2015	180 m	Yichang - 5S50ME-B9	5.2	D
2215	WOOYANG DANDY IMO 9455648	56,819	2009	190 m	MAN - 6S50MC-C	5.2	D
2216	YASA CANARY IMO 9524700	55,446	2013	188 m	Hyundai - 6S50MC-C	5.2	D
2217	MENELAOS IMO 9696436	63,458	2015	200 m	MAN - 5S60ME-C8	5.2	D
2218	YASAR KEMAL IMO 9230191	52,827	2001	190 m	MAN - 6S50MC	5.2	D
2219	CHANG HANG HAN HAI IMO 9628752	58,022	2012	200 m	MAN - 6S50MC-C	5.2	D
2220	NORD TOPAZ IMO 9992268	39,988	2024	183 m	MAN-B&W 6S46ME-B8	5.2	D
2221	NAPHA NAREE IMO 9703423	38,737	2015	180 m	MAN - 5S60ME-C8	5.2	D
2222	THOR INDEPENDENCE IMO 9222510	52,407	2001	190 m	Mitsui - 6S50MC	5.2	D
2223	KING WIN IMO 9590230	56,809	2012	190 m	STX - 6 S 50 MC-C	5.2	D
2224	INDIGO FLORA IMO 9584877	58,724	2013	197 m	Kawasaki - 6S50MC-C7	5.2	D
2225	EAGLE TRADER IMO 9648855	57,981	2013	190 m	Doosan - 6S50MC-C	5.2	D
2226	HAMBURG CITY IMO 9863170	39,513	2020	180 m	MAN - 5S50ME-B9.2	5.2	D
2227	SSI DEFIANT IMO 9603116	56,489	2013	190 m	MAN - 6S50MC-C	5.2	D
2228	VIVA COSMOS IMO 9251327	52,089	2003	190 m	6S50MC	5.2	D
2229	NORDTAJO IMO 9741865	39,890	2017	180 m	Wärtsilä - 5S50ME-B9	5.2	D
2230	TELERIG IMO 9452854	56,867	2011	190 m	MAN - 6S50MC-C	5.2	D
2231	PAN OPTIMUM IMO 9890915	37,704	2020	180 m	MAKITA - 6S50ME-C8	5.2	D
2232	IVS WENTWORTH IMO 9725550	58,091	2015	190 m	MAN - 6S50MC-C	5.2	D
2233	SAVITA NAREE IMO 9726437	62,971	2016	200 m	Doosan - 5G60ME-C9	5.2	D
2234	OCEAN KNIGHT IMO 9453248	56,808	2011	190 m	STX - 6 S 50 MC-C	5.2	D
2235	PLATON IMO 9452555	58,501	2011	196 m	Doosan - 6S50MC-C MK8	5.2	D
2236	FEDERAL YUKON IMO 9205897	36,563	2000	200 m	6S46MC-C	5.2	D
2237	MISTRAL I IMO 9650860	81,813	2013	229 m	Doosan - 5S60MC-C8	5.2	D
2238	LOWLANDS OPAL IMO 9317559	55,381	2007	190 m	Kawasaki - 6S26MC-C	5.2	D
2239	UNITY HARMONY IMO 9791054	37,140	2020	180 m	MAN - 6S46ME-B8	5.2	D
2240	IMOGEN IMO 9884370	37,702	2020	180 m	6S46ME-B8	5.2	D
2241	JAMES BAY IMO 9610676	37,633	2013	180 m	MAN - 6S46ME-B8	5.2	D
2242	ASTRO PROPUS IMO 9691498	38,271	2014	180 m	MAKITA - 6S46MC-C	5.2	D
2243	RUBINA IMO 9725512	39,959	2018	180 m	Doosan - 5RT-flex50	5.2	D
2244	UNION EXPLORER IMO 9449259	57,700	2011	190 m	STX - 6 S 50 MC-C	5.2	D
2245	EVA BRIGHT IMO 9972438	40,577	2023	180 m	China Shipbuilding Industry Co Diesel Engine Co Ltd 5S50ME-C9-HPSCR	5.2	D
2246	NORSE CAMDEN IMO 9926996	40,020	2022	183 m	Mitsui - 5S50ME-B9	5.2	D
2247	AMIRA SOPHIE II IMO 9672208	34,358	2014	180 m	Mitsubishi - 6UEC45LSE	5.2	D
2248	GULLUK IMO 9228100	50,992	2002	190 m	Kawasaki - 6S50MC-C	5.2	D
2249	NORDSUN IMO 9705158	61,559	2015	200 m	MAN - 6S50ME-B9	5.2	D
2250	SEA BREEZE IMO 9869710	40,077	2021	180 m	Yichang - 5S50ME-B9	5.2	D

Page 45 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.