Most Emission-Efficient Chemical Tankers

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)

#512 of 1,422 chemical tankers

CO₂ intensity

7.0 g CO₂/dwt·nm

vs segment average (9.4)

-26% 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

1,451

vessels ranked

3.48

greenest (g CO₂/t·nm)

8.28

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
502	LADYBUG IMO 9391385	37,527	2008	184 m	MAN - 6S46MC-C	6.9	B
501	DDELPHINUS 12 IMO 9359375	46,011	2010	183 m	MAN - 5S60MC-C	6.9	B
503	MONARCH IMO 9461661	49,999	2011	183 m	MAN - 6S50MC-C	6.9	B
504	MARQUETTE IMO 9732785	37,596	2016	184 m	MAN - 6S50ME-B9	6.9	B
506	NCC SHAMS IMO 9459010	45,468	2012	183 m	Doosan - 6S50MC-C	6.9	B
505	STORE BAY IMO 9733698	30,711	2015	175 m	MAN - 6S50ME-C8	6.9	B
509	BOW ELM IMO 9388302	46,098	2011	183 m	MAN - 5S60MC-C	6.9	B
508	INTERMEZZO IMO 9804825	37,328	2019	180 m	MAKITA - 6S46ME-B8	6.9	B
507	MEDALTA ADVENTURER IMO 9761451	30,727	2015	175 m	Mitsui - 6S50ME-C8	6.9	B
510	HAFNIA TURQUOISE IMO 9753674	49,516	2016	183 m	MAN - 6S50MC-C	7.0	B
511	BOW LIND IMO 9388314	46,047	2011	183 m	MAN - 5S60MC-C	7.0	B
512	FAUSKANGER IMO 9387700	46,180	2009	183 m	Hyundai - 6S50MC-C	7.0	B
513	ARDMORE ENDURANCE IMO 9654567	49,466	2013	183 m	MAN - 6S50ME-B9	7.0	B
515	MRC NAZENDE IMO 9419735	51,291	2009	183 m	STX - 6 S 50 MC-C	7.0	B
514	HAFNIA VIOLETTE IMO 9690626	49,126	2015	183 m	Hyundai - 6G50ME-B9	7.0	B
516	MARLIN AMMOLITE IMO 9697246	49,999	2016	183 m	MAN - 6S50ME-B9	7.0	B
517	STOLT COURAGE IMO 9296731	32,858	2004	174 m	Mitsui - 6S50MC	7.0	B
518	RED GARNET IMO 9694359	49,999	2015	183 m	MAN - 6G50ME-B9	7.0	B
519	VALLE SOLE IMO 9635781	49,999	2013	183 m	MAN - 6S50MC-C8	7.0	B
520	MANDAL IMO 9732773	37,596	2016	184 m	MAN - 6S50ME-B9	7.0	B
521	BOW FLORA IMO 9143207	37,369	1998	183 m	6L60MC	7.0	B
522	PTI NILE IMO 9747338	49,999	2014	183 m	MAN - 6S50MC-C8	7.0	B
523	STENA IMPECCABLE IMO 9693020	49,737	2017	183 m	DALIAN MARINE - 6S50ME-B9.3	7.0	B
524	GRANDE RIVIERE IMO 9733686	30,732	2015	175 m	Mitsui - Mitsui 2 SA 6 CY	7.0	B
526	MERAPI IMO 9430167	46,872	2006	185 m	Yichang - 6S50MC-C	7.0	B
525	SC SCORPIO IMO 9801079	40,964	2017	183 m	STX - 6S50ME-B9	7.0	B
527	JIPRO NEFTIS IMO 9459292	34,858	2011	174 m	Mitsubishi - 6UEC50LSII	7.0	B
528	IONIAN SEA IMO 9322384	48,315	2005	186 m	Mitsui - 6S50MC	7.1	B
529	STENA IMPRESSION IMO 9667461	49,776	2015	183 m	MAN - 6S50ME-B9.3	7.1	B
530	VINJERAC IMO 9489194	49,999	2011	195 m	3. MAJ - 7RTA48T-B	7.1	B
531	NCC QASSIM IMO 9306811	46,038	2006	180 m	Hyundai - 6S50MC-C	7.1	B
533	ASPROUDA IMO 9478729	74,011	2013	229 m	Doosan - 6S60MC-C MK7.1	7.1	B
532	CIELO DI SALERNO IMO 9717292	39,309	2016	184 m	Hyundai - 6S50ME-B9	7.1	B
534	DIVA IMO 9760548	37,296	2017	180 m	MAKITA - 6S46ME-B8	7.1	B
535	NCC NAJEM IMO 9459022	45,499	2012	183 m	MAN - 6S50MC-C	7.1	B
537	AQUADISIAC IMO 9396713	50,695	2008	183 m	MAN - 6S50MC-C	7.1	B
536	NAVIG8 EXCEL IMO 9973901	49,127	2024	183 m	6G50ME-C9-HPSCR	7.1	B
539	SOLAR SHERIDAN IMO 9877652	25,039	2021	169 m	MAN - 6S46ME-B8	7.1	B
538	STOLT APAL IMO 9719240	32,798	2016	185 m	Jiangsu Antai Power Co. Ltd. 5G50ME-B9	7.1	B
540	LINUS P IMO 9749350	32,247	2014	169 m	Hyundai - 6S46ME-B8	7.1	B
541	AMIF IMO 9396373	40,429	2008	180 m	MAN - 6S50MC-C	7.1	B
542	VELEBIT IMO 9455741	49,999	2011	195 m	3. MAJ - 7RTA48T	7.1	B
543	BOW TRAJECTORY IMO 9669873	49,622	2014	183 m	MAN - 6S50ME-B9	7.1	B
544	BRISTOL TRADER IMO 9737101	35,863	2016	180 m	Mitsui - 6S50ME-B9.3	7.2	B
546	TG CRAB IMO 9400394	33,624	2009	170 m	Akasaka - 6UEC52LS	7.2	B
545	INITIATOR IMO 9995466	44,997	2025	183 m	MAN-B&W 6G50ME-C9	7.2	B
550	HENG HUI YONG WANG IMO 9294288	34,614	2004	170 m	Akasaka - 6UEC52LS	7.2	B
549	STOLT PONDO IMO 9374521	33,232	2007	170 m	Akasaka - 6UEC52LS	7.2	B
548	SKYLIGHT IMO 9396737	50,926	2008	183 m	MAN - 6S50MC-C	7.2	B
547	BOW HERCULES IMO 9752046	40,847	2017	183 m	STX - 6S50ME-B9	7.2	B

Page 11 of 29 — 1,422 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.