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 2025. Lower is greener. Pick a segment and size class to see the greenest vessels first.

Segment rank (2025)

#1,170 of 2,380 general cargos

CO₂ intensity

14.3 g CO₂/dwt·nm

vs segment average (13.96)

+2% 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

2,429

vessels ranked

3.13

greenest (g CO₂/t·nm)

14.48

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
1151	BBC REGALIA IMO 9539389	17,907	2012	162 m	MAN - 6S50MC-C	14.2	C
1152	YM FUJI IMO 9622760	10,952	2015	131 m	MAN - 6L32/44CR	14.2	C
1153	RIX ALLIANCE IMO 9128403	3,004	1995	88 m	MWM - SBV 6 M 628	14.2	C
1154	PONTICA IMO 9681974	9,005	2014	137 m	Mitsubishi - 5UEC33LSII	14.2	C
1155	PROUD IMO 9386433	6,500	2009	119 m	MAK/Caterpillar - 6L26	14.2	C
1156	HELGOLAND IMO 9973250	5,946	2024	100 m	MAN 6L27/38	14.2	C
1157	KATE C IMO 9523964	6,794	2010	106 m	MAK/Caterpillar - 6M25C	14.2	C
1158	HAV ZANDER IMO 9001849	2,999	1990	88 m	MWM - SBV 6 M 628	14.2	C
1159	BORNHOLM IMO 9968267	5,212	2024	90 m	MAK/Caterpillar - 6M25E	14.2	C
1160	HUMBERGRACHT IMO 9433274	12,738	2009	138 m	MAK/Caterpillar - 6M43	14.2	C
1161	BBC VIRGINIA IMO 9501277	12,657	2010	138 m	MAK/Caterpillar - 6 M 43 C	14.2	C
1162	IOANNIS IMO 8518340	3,697	1986	88 m	MAK/Caterpillar - 6M452AK	14.2	C
1163	AEROE IMO 9968140	5,259	2023	90 m	MAK/Caterpillar - 6M25E	14.2	C
1164	JSP MØN IMO 9968176	5,228	2023	90 m	MaK 6M25E	14.2	C
1165	AYITA IMO 9290048	10,384	2004	146 m	MAK/Caterpillar - MAK 9M32C	14.2	C
1166	VLISTBORG IMO 9160346	9,567	1999	132 m	Wärtsilä - 6R38	14.2	C
1167	KARILIN IMO 9534262	6,698	2009	114 m	MAK/Caterpillar - 9M25	14.3	C
1168	LADY DEBORA IMO 9147875	7,580	1998	108 m	MAN - 6S26MC	14.3	C
1169	TANJA IMO 9534444	10,049	2011	116 m	MAK/Caterpillar - 8M32C	14.3	C
1170	FYN IMO 9968188	5,243	2023	90 m	MAK/Caterpillar - 6M25E	14.3	C
1171	KNARRLAGSUND IMO 9268849	6,734	2004	111 m	Wärtsilä - 6L26	14.3	C
1172	AMADEUS SAFFIER IMO 9996903	3,610	2024	88 m	—	14.3	C
1173	BARBARA-B IMO 9177399	5,535	1997	101 m	SKL - 8VD29/24AL-2	14.3	C
1174	C. ENDEAVOUR IMO 9171060	3,516	1997	87 m	MWM - SBV8M628	14.3	C
1175	PRINCE HASAN IMO 9102825	6,856	1994	100 m	STX - 6L35MC	14.3	C
1176	VOORNEBORG IMO 9179373	9,567	1999	132 m	Wärtsilä - 6R38	14.3	C
1177	GUNCE AKAY IMO 9421051	8,678	2007	108 m	MAK/Caterpillar - 6M32C	14.3	C
1178	SOMMEN IMO 9968138	5,248	2023	90 m	MaK 6M25E	14.3	C
1179	NAFKRATIS IMO 9235945	7,528	2000	101 m	Mitsubishi - 6UEC37LA	14.3	C
1180	BBC RAISE IMO 9538880	17,884	2011	162 m	MAN - 6S50MC-C	14.3	C
1181	LOVISA IMO 9957397	7,896	2023	120 m	Wartsila 9L34DF	14.3	C
1182	SOFIA IMO 9957414	7,896	2024	120 m	Wartsila 9L34DF	14.3	C
1183	ONEGO DUERO IMO 9580780	9,770	2012	132 m	Bergen - B32:40L8P	14.3	C
1184	MINKA C IMO 9373565	5,536	2008	100 m	MAK/Caterpillar - 6M25	14.3	C
1185	KLARA IMO 9507130	5,940	2010	107 m	MAK/Caterpillar - 6M25	14.3	C
1186	SOLITAS-H IMO 9858670	3,850	2021	89 m	A.B.C. 6DZC	14.3	C
1187	ALINDA IMO 9969431	3,637	2024	88 m	—	14.4	C
1188	BIOMAR IMO 9956276	5,350	2025	90 m	Yanmar 6EY26W	14.4	C
1189	DAMGRACHT IMO 9420784	18,143	2009	157 m	Wärtsilä - 8L46	14.4	C
1190	GERD IMO 9052707	4,000	1993	89 m	THE NETHERLANDS 6SW280	14.4	C
1191	NURDOGAN IMO 9001930	3,014	1990	88 m	MAK/Caterpillar - 3512B-DITA	14.4	C
1192	ONEGO NEVA IMO 9438585	11,087	2008	146 m	MAK/Caterpillar - 9M32C	14.4	C
1193	FRISIAN SPRING IMO 9367774	6,582	2007	118 m	Wärtsilä - 6L26	14.4	C
1194	MPP IKONS IMO 9504279	9,347	2010	116 m	MAK/Caterpillar - 9M252	14.4	C
1195	UML VERONICA IMO 9500089	12,906	2010	140 m	Hyundai - 6S46MC-C	14.4	C
1196	HENRIKE IMO 9218222	3,171	2000	90 m	MAK/Caterpillar - 8M20	14.4	C
1197	KIMBERLY C IMO 9558050	6,805	2011	106 m	MAK/Caterpillar - 6M25C	14.4	C
1198	BOCS PASSION IMO 9500065	12,906	2010	140 m	MAN - 6S46MC-C	14.4	C
1199	BALTIC STAR IMO 9969534	3,718	2025	88 m	—	14.4	C
1200	TORONEOS IMO 9237400	7,568	2000	100 m	Akasaka - 6UEC37LA	14.4	C

Page 24 of 48 — 2,380 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.