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)

#2,337 of 3,436 bulk carriers

CO₂ intensity

5.2 g CO₂/dwt·nm

vs segment average (4.71)

+10% 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
2301	CL PROSPERITY IMO 1041790	40,409	2024	180 m	MAN-B&W 5S50ME-C9	5.2	D
2302	SPAR CORONA IMO 9497830	58,018	2011	190 m	MAN - 6S60MC-C	5.2	D
2303	OCEAN CROWN IMO 9866653	37,870	2020	180 m	MAN - 6S50ME-C8	5.2	D
2304	FEDERAL LEXI ROSE IMO 9975442	34,763	2025	200 m	MAN-B&W 5S50ME-C	5.2	D
2305	FLORENTIA IMO 9714666	63,340	2016	200 m	Hudong Heavy Machinery - 5G60ME-C9	5.2	D
2306	SOFIA IMO 9472086	56,899	2011	190 m	MAN - 6S50MC-C	5.2	D
2307	WADI ALYARMOUK IMO 9460772	80,384	2010	229 m	MAN - 7S50MC-C	5.2	D
2308	FRIEDERIKE IMO 9436769	57,369	2011	190 m	STX - 6 S 50 MC-C	5.2	D
2309	NORSE IJMUIDEN IMO 9905253	42,469	2021	180 m	MAN - 5S50ME-C9	5.2	D
2310	SUMATRA IMO 9753260	38,943	2016	180 m	Wärtsilä - 5RT-flex50D	5.2	D
2311	WARIYA NAREE IMO 9353668	53,833	2011	190 m	Sulzer - 6RT-flex50	5.2	D
2312	TAMREY S IMO 9171541	31,025	1999	176 m	Hyundai - 6S42MC	5.2	D
2313	PABELA IMO 9468126	55,389	2011	190 m	Wärtsilä - 6RT-flex50	5.2	D
2314	OCEANBEAUTY IMO 9641338	56,715	2013	190 m	Dalian 6S60MC	5.2	D
2315	SERENE AMELIA IMO 9567958	57,238	2010	190 m	STX - 6 S 50 MC-C	5.2	D
2316	FEDERAL YUKINA IMO 9476977	35,868	2010	200 m	Kawasaki - 6S46MC-C	5.2	D
2317	STELLAR LADY IMO 9574004	51,201	2011	183 m	MAN - 6S50MC	5.2	D
2318	NIKOLAOS S IMO 9473315	75,020	2010	225 m	MAN - 5S60MC-C	5.2	D
2319	SARITA NAREE IMO 9726413	62,964	2015	200 m	MAN - 5G60ME-C9	5.2	D
2320	LILA CUMBERLAND IMO 9666649	56,531	2013	190 m	Doosan - 6S50MC-C	5.2	D
2321	GEORGE IMO 9650810	38,276	2013	180 m	MAN - 6S46MC-C	5.2	D
2322	TRUE FRIEND IMO 9550668	51,241	2009	183 m	Mitsui - 6S50MC-C	5.2	D
2323	YASA ROSE IMO 9955612	40,238	2022	180 m	MAN - 5S50ME-C9	5.2	D
2324	HALKI IMO 9543419	38,879	2011	186 m	Hyundai - 6S46MC-C	5.2	D
2325	FREE STATE IMO 9386392	58,679	2008	190 m	MAN - 6S50MC-C	5.2	D
2326	CARINA IMO 9151333	77,283	1998	230 m	KAWASAKI HEAVY INDUSTRIES, LTD. 6S60MC-MKVI	5.2	D
2327	COS ORCHID IMO 9308704	55,539	2006	190 m	Hudong Heavy Machinery - 6S50MC-C	5.2	D
2328	AMOY ACTION IMO 9583029	57,631	2016	190 m	Mitsui - 7S50ME-B9.3-TII(8470@99)	5.2	D
2329	AFRICAN TEAL IMO 9691046	40,652	2015	180 m	Doosan - 5S50ME-B9	5.2	D
2330	TANIA IMO 9689562	37,188	2014	180 m	Wärtsilä - 5RT-flex50	5.2	D
2331	MP ULTRAMAX 1 IMO 9703590	63,339	2013	200 m	Doosan - 5S60ME-C8	5.2	D
2332	YASA LOTUS IMO 9955624	40,282	2023	180 m	MAN - 5S50ME-C9	5.2	D
2333	ULTRA SILVA IMO 9873890	40,213	2021	180 m	MAN - 5S50ME-C9	5.2	D
2334	FEDERAL FREEDOM IMO 9866756	34,492	2021	200 m	Kawasaki Heavy Industries Ltd. 5S50ME-C9.7	5.2	D
2335	SOZON IMO 9401922	50,779	2010	190 m	MAN - 5S60MC-C	5.2	D
2336	SILVER IMO 9663324	37,399	2023	180 m	MAKITA - 6S46MC-C8.2	5.2	D
2337	AMBER S IMO 9200354	47,282	2000	186 m	Kawasaki - 6S46MC-C	5.2	D
2338	PAVLARA IMO 9741736	40,000	2016	180 m	Wärtsilä - 5RT-flex50D	5.2	D
2339	CAPTAINYANNIS L IMO 9343546	55,688	2008	190 m	Kawasaki - 6S50MC-C	5.2	D
2340	FEDERAL CARIBOU IMO 9671096	34,564	2016	200 m	MAN - 6S46MC-C	5.2	D
2341	FEDERAL INDIANA IMO 9975387	34,763	2024	200 m	—	5.2	D
2342	OCEANMASTER IMO 9641340	56,715	2013	190 m	Dalian 6S60MC	5.2	D
2343	FAST IMO 9513842	55,398	2012	188 m	Hyundai - 6S50MC-C8	5.2	D
2344	MAGIC STRIKER IMO 9493664	56,802	2010	190 m	Doosan - 6S50MC-C	5.2	D
2345	JASMUND IMO 9696840	38,868	2015	180 m	Wärtsilä - 6RT-flex48T-D	5.2	D
2346	NORSE HOUSTON IMO 9909675	40,020	2021	183 m	Mitsui - 5S50ME-B9	5.2	D
2347	CHILEAN BULKER IMO 9855434	39,522	2019	180 m	MAN - 5S50ME-B9.2	5.2	D
2348	ANGELINA THE GREAT N IMO 9593725	55,768	2012	190 m	Diesel United - 6RT-flex50	5.2	D
2349	FEDERAL DEE IMO 9805269	34,492	2018	200 m	Kawasaki - 5S50ME-C9	5.2	D
2350	SHENG XING HAI IMO 9416537	57,291	2009	200 m	MAN - 6S50MC-C	5.2	D

Page 47 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.