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 2024. Lower is greener. Pick a segment and size class to see the greenest vessels first.

Segment rank (2024)

#481 of 1,350 chemical tankers

CO₂ intensity

7.3 g CO₂/dwt·nm

vs segment average (9.91)

-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

1,378

vessels ranked

3.64

greenest (g CO₂/t·nm)

8.79

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
451	HAFNIA ARONALDO IMO 9711561	38,506	2015	184 m	MAN - 6S50ME-B9	7.1	B
452	BOW FAGUS IMO 9047764	37,375	1995	183 m	6L60MC	7.1	B
453	OPERA IMO 9804887	37,245	2020	180 m	Mitsubishi - 5UEC50LSH	7.1	B
454	ECO REVOLUTION IMO 9725598	39,208	2016	184 m	Hyundai - 6S50ME-B9	7.2	B
456	DEE4 JUNIPER IMO 9930923	49,999	2020	183 m	Hyundai Heavy Industries Co. Ltd. 6G50ME-C9.6	7.2	B
455	VERIGE IMO 9401128	52,725	2010	195 m	3. MAJ - 7RTA48T	7.2	B
457	ANDREA VICTORY IMO 9288849	47,210	2005	184 m	Hyundai - 7S50MC-C	7.2	B
458	APIASTOS IMO 9365374	49,997	2007	183 m	Sulzer - 7RTA48T	7.2	B
460	BOW STAR IMO 9197296	49,487	2004	183 m	Sulzer - 6RTA58T	7.2	B
459	NCC SAMA IMO 9480150	45,471	2012	183 m	MAN - 6S50MC-C	7.2	B
461	STOLT GLORY IMO 9311012	33,929	2005	174 m	Mitsui - 6S50MC	7.2	B
462	SUPERBA IMO 9538165	37,949	2014	183 m	MAN - 5S50ME-B9.2 Tier II	7.2	B
463	HAFNIA MAGELLAN IMO 9725615	39,067	2015	184 m	MAN - 6S50ME-B9	7.2	B
464	STORE BAY IMO 9733698	30,711	2015	175 m	MAN - 6S50ME-C8	7.2	B
466	BOCHEM GHENT IMO 9565649	33,628	2011	170 m	Mitsubishi - 6UEC52LS	7.2	B
465	CARTAGENA IMO 9389318	46,923	2009	183 m	Hyundai - 7S50MC-C	7.2	B
467	FAITHFUL STAR IMO 9228320	34,465	2000	174 m	Mitsubishi - 6UEC52LS	7.2	B
470	ANTARES IMO 9800817	40,356	2022	180 m	MAN - 6S50ME-C9	7.2	B
469	HAFNIA ALMANDINE IMO 9714068	38,506	2015	180 m	MAN - 6S50ME-B9	7.2	B
468	STOLT SYPRESS IMO 9150315	36,677	1998	182 m	6L60MC	7.2	B
473	HAFNIA VALENTINO IMO 9692246	49,126	2015	183 m	MAN - 6G50ME-B9	7.3	B
472	UOG DESPINA V IMO 9425318	49,999	2010	183 m	MAN - 6S50MC	7.3	B
471	STOLT BRELAND IMO 9414084	43,475	2010	183 m	Kawasaki - 7S50MC-C	7.3	B
474	THEANOULA IMO 9935557	39,855	2022	183 m	Hyundai Heavy Industries Co. Ltd. 6S50ME-C9-HPSCR	7.3	B
477	BOW AQUARIUS IMO 9753791	40,900	2016	183 m	Hyundai - 6S50ME-B9	7.3	B
476	BOCHEM HOUSTON IMO 9955428	26,611	2021	159 m	MAN - 5S50ME-C9	7.3	B
475	BOW SIRIUS IMO 9215294	49,539	2006	183 m	Sulzer - 6RTA58T	7.3	B
478	REGUETON IMO 9411989	37,872	2009	184 m	MAN - 6S46MC-C	7.3	B
479	HAFNIA AZOTIC IMO 9719757	38,506	2013	184 m	MAN - 6S50ME-B9	7.3	B
480	SEA CUMULUS IMO 9724532	39,999	2016	183 m	Hyundai - 6S50ME-B9	7.3	B
482	LUCKY SAILOR IMO 9464352	37,596	2009	184 m	Hyundai - 7S50MC-C	7.3	B
481	HW OTTO IMO 9394040	40,435	2007	180 m	MAN - 6S50MC-C	7.3	B
483	BOW CAPRICORN IMO 9752010	40,929	2014	183 m	STX - 6S50ME-B9	7.3	B
485	MEDALTA ADVENTURER IMO 9761451	30,727	2015	175 m	Mitsui - 6S50ME-C8	7.3	B
484	HAFNIA AMETRINE IMO 9714513	38,506	2015	184 m	MAN - 6S50ME-B9	7.3	B
486	BOW CECIL IMO 9143219	37,369	1998	183 m	6L60MC	7.3	B
488	WISDOM STAR IMO 9278674	34,528	2003	174 m	Mitsubishi - 6UEC52LS	7.3	B
487	MANDAL IMO 9732773	37,596	2016	184 m	MAN - 6S50ME-B9	7.3	B
489	MILANO IMO 9286059	37,305	2005	183 m	Hyundai - 6S50MC-C	7.3	B
491	STENA IMAGE IMO 9667473	49,719	2015	183 m	MAN - 6S50ME-B9.3	7.3	B
490	VELOS AQUARIUS IMO 9381756	49,999	2008	183 m	HHI - 6S50MC-C	7.3	B
492	THE JUDGE IMO 9755725	37,770	2016	183 m	Hyundai - 6S50ME-B9	7.4	B
494	STOLT BELUGA IMO 9613965	33,552	2013	170 m	Akasaka - 6UEC50LSII	7.4	B
493	BOW GEMINI IMO 9752034	40,895	2017	183 m	Hyundai - 6S60ME-B9	7.4	B
496	BOW FIRDA IMO 9250751	37,427	2003	183 m	MAN - 7S50ME-C	7.4	B
495	NCC HUDA IMO 9399272	45,459	2011	183 m	Doosan - 5S60MC-C	7.4	B
499	GULF HUWAYLAT IMO 9359870	45,967	2008	183 m	MAN - 6S50MC-C	7.4	B
498	BRISTOL TRADER IMO 9737101	35,863	2016	180 m	Mitsui - 6S50ME-B9.3	7.4	B
497	ZEZE START IMO 9392781	49,999	2009	183 m	HHI - 6S50MC-C	7.4	B
500	GREEN SPINEL IMO 9583653	51,034	2012	183 m	STX - 6 S 50 MC-C	7.4	B

Page 10 of 27 — 1,350 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.