Most Emission-Efficient General Cargos

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)

#163 of 1,190 general cargos

CO₂ intensity

5.5 g CO₂/dwt·nm

vs segment average (10.91)

-50% 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

1,215

vessels ranked

3.23

greenest (g CO₂/t·nm)

11.21

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
151	ARBORELLA IMO 9613288	57,540	2012	200 m	STX - 6 S 50 MC-C	5.4	A
153	RIJN CONFIDENCE IMO 9635248	33,328	2013	180 m	Mitsubishi - 6UEC45LSE	5.4	A
152	DEVBULK IMABARI IMO 9550412	28,742	2009	170 m	MAKITA - 6S42MC	5.4	A
154	HARDANGER IMO 9079119	50,198	1995	213 m	MAN - 6L23/30	5.5	A
155	DEMA M IMO 9255074	32,259	2003	172 m	Mitsubishi - 6UEC52LA	5.5	A
156	VALENTINA 1 IMO 9336830	50,199	2007	190 m	STX - 6 S 50 MC-C	5.5	A
158	STAR JAVA IMO 9310513	44,692	2006	198 m	Mitsui - 6S60MC	5.5	A
157	DEVBULK DEMET IMO 9625592	30,124	2012	179 m	STX - 6S42MC7	5.5	A
159	NIMBLE NICKY IMO 9424091	31,887	2010	176 m	Akasaka - 6UEC45LSE	5.5	A
160	GULLHOLMEN ISLAND IMO 9605085	38,309	2011	180 m	MAN - 6S46MC-C	5.5	A
162	DELICATA IMO 9613317	57,441	2013	200 m	STX - 6 S 50 MC-C	5.5	A
161	DEVBULK SINEM IMO 9416458	38,009	2013	180 m	MAN - 6S46MC-C	5.5	A
163	SAGA MORUS IMO 9117741	56,816	1997	200 m	6S60MC	5.5	A
164	STAR HARMONIA IMO 9103130	46,600	1998	198 m	6S60MC	5.5	A
166	GARDNO IMO 9767704	36,643	2018	200 m	Hudong Heavy Machinery - 5G50ME-B9	5.5	A
165	BERGE GALDHOPIGGEN IMO 9753284	38,907	2017	180 m	Wärtsilä - 5RT-flex50D	5.5	A
167	ARTAX IMO 9623063	37,072	2014	178 m	Mitsubishi - 6UEC45LSE	5.5	A
168	EMMA OLDENDORFF IMO 9676606	38,300	2014	180 m	MAN - 5S50ME-B9	5.5	A
170	SEA FALCON IMO 9401843	51,725	2010	188 m	Mitsubishi - 6UEC50LSII	5.5	A
169	DEVBULK BEGUM IMO 9625607	30,124	2012	179 m	STX - 6S42MC7	5.5	A
172	SAGA EXPLORER IMO 9343493	46,500	2006	199 m	Diesel United - 7RTA52	5.6	A
171	REGAL RACHEL IMO 9424089	31,881	2010	176 m	Mitsubishi - 6UEC45LSE	5.6	A
173	ADASUN IMO 9747053	34,483	2017	180 m	MAN - 6S46ME-B8	5.6	A
174	FALCON S IMO 9329423	37,406	2007	178 m	Akasaka - 6UEC52LA	5.6	A
175	RADIANT REB IMO 9633197	38,233	2012	180 m	MAN - 6S46MC-C	5.6	A
176	CHARISMA.GR IMO 9834856	37,295	2019	180 m	MAKITA - 6S46ME-B8.5	5.6	A
178	TEAL ARROW IMO 9186780	36,466	1999	173 m	Kawasaki - 6S46MC-C	5.6	A
177	NORWAY PEARL IMO 9731224	45,474	2015	183 m	6S50MC-C8	5.6	A
179	SAGA TUCANO IMO 9160803	47,032	1998	199 m	Diesel United - 7RTA52	5.6	A
180	PELICANA IMO 9401790	58,022	2009	212 m	Kawasaki - 6S60MC	5.6	A
182	AFRICAN RAVEN IMO 9700287	37,711	2014	183 m	Hitachi - 6S46ME-C8.3	5.6	A
181	DEVBULK ALARA IMO 9449895	30,130	2011	179 m	MAKITA - 6S42MC	5.6	A
183	FEDERAL RUHR IMO 9766176	36,575	2017	200 m	Jiangsu Antai Power Co. Ltd. 5G50ME-B9	5.6	A
184	STAR KINN IMO 9396141	49,850	2010	209 m	Hyundai - 5 S 60 MC-C	5.6	A
185	SAGA SKY IMO 9144354	47,034	1996	199 m	Sulzer - 7RTA62	5.6	A
187	ELM ARROW IMO 9419254	53,035	2010	196 m	MAN - 7S50MC-C	5.7	A
186	LONGVIEW LOGGER IMO 9338541	33,527	2007	176 m	Mitsubishi - 6UEC52LA	5.7	A
188	POCHARD S IMO 9363314	32,285	2007	177 m	Mitsubishi - 6UEC52LA	5.7	A
190	SAGA FALCON IMO 9613848	55,596	2012	200 m	STX - 5S60ME-C8	5.7	A
189	SSI MERAL HANIM IMO 9491678	37,238	2011	178 m	Akasaka - 6UEC52LA	5.7	A
191	CETUS SEI IMO 9526722	36,936	2014	178 m	Akasaka - 6UEC45LSE	5.7	A
192	CRIMSON MAJESTY IMO 9660059	38,035	2013	180 m	MAKITA - 6S46MC-C	5.7	A
193	SIBAL IMO 9712620	33,364	2015	180 m	Mitsubishi - 6UEC45LSE	5.7	A
194	AFRICAN OWL IMO 9701255	34,370	2016	180 m	Mitsubishi - 6UEC45LSE	5.7	A
195	CENTURIUS IMO 9712618	33,367	2015	180 m	Mitsubishi - 6UEC45LSE-Eco	5.7	A
198	ARACARI ARROW IMO 9008706	46,956	1992	199 m	Sulzer - 7RTA52	5.8	A
197	CANNY CAROLINE IMO 9580027	32,070	2012	176 m	Akasaka - 6UEC45LSE	5.8	A
196	TRINIDAD PEARL IMO 9659737	45,556	2014	183 m	MAN - 6S50MC-C8	5.8	A
200	POLSTEAM KOPROWO IMO 9971862	37,592	2024	200 m	MAN-B&W 5S50ME-C9	5.8	A
199	RIZABEY IMO 9197117	24,999	1999	160 m	Mitsui - 6S42MC	5.8	A

Page 4 of 24 — 1,190 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.