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)

#139 of 1,350 chemical tankers

CO₂ intensity

5.3 g CO₂/dwt·nm

vs segment average (9.91)

-46% 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
104	HAFNIA MIKALA IMO 9732709	49,999	2017	183 m	Hudong Heavy Machinery - 6S50ME-B9.2 (Tier II)	5.1	A
102	SILVER ELLIE IMO 9692387	49,950	2015	183 m	MAN - 6G50ME-B9	5.1	A
101	NAVIG8 ESTELLE IMO 9973925	49,155	2024	183 m	6G50ME-C9-HPSCR	5.1	A
103	YASA VEGA IMO 9888352	50,215	2021	183 m	MAN - 6G50ME-C9	5.1	A
108	SEADRIVE IMO 9934137	50,394	2021	183 m	MAN - 6G50ME-C9	5.2	A
107	SOLAR RUBA IMO 9907768	49,367	2021	183 m	MAN - 6G50ME-C9	5.2	A
106	TAKAROA SUN IMO 9850202	49,849	2019	183 m	Hyundai - 6G50ME-C9-LGIM	5.2	A
105	CHIOS STAR IMO 9827566	50,506	2018	183 m	MAN - 6G50ME-C9	5.2	A
109	CASTARA IMO 9834155	50,620	2019	186 m	Hyundai - B&W 6G50ME-C9.5(TIER II)	5.2	A
111	PS ROMA IMO 9510462	51,063	2011	183 m	MAN - 6S60MC-C	5.2	A
110	MATRAH IMO 9405849	51,021	2008	183 m	MAN - 6S50MC-C	5.2	A
112	CLEAROCEAN MAGIC IMO 9849382	49,995	2019	183 m	STX - 6G50ME-C9	5.2	A
113	MADHA SILVER IMO 9718818	45,923	2016	183 m	Hyundai - 6G50ME-B9	5.2	A
115	HIGH CHALLENGE IMO 9740586	49,990	2017	183 m	Hyundai - 6G50ME-B9	5.2	A
114	LARGO DESERT IMO 9828912	49,703	2018	183 m	Hyundai - 6G50ME-B9	5.2	A
116	NORD SWIFT IMO 9692155	49,573	2015	183 m	MAN - 6S50MC-C	5.2	A
117	ELKA ATHINA IMO 9249116	101,970	2004	244 m	BRODOSPLIT - 6S60MC	5.2	A
118	AMIRANTE IMO 9629706	49,994	2013	183 m	STX - 6 S 50 MC-C	5.2	A
119	STI MAVERICK IMO 9833589	49,999	2019	183 m	Hyundai - 6G50ME-C9	5.2	A
120	JUPITER STAR IMO 9919632	50,434	2021	183 m	Hyundai Heavy Industries Co. Ltd. 6G50ME-C9.6-HPSCR	5.2	A
122	STI MAXIMUS IMO 9854741	49,999	2020	183 m	Hyundai - 6G50ME-C9	5.2	A
121	SKYLIGHT IMO 9396737	50,926	2008	183 m	MAN - 6S50MC-C	5.2	A
125	NORD VANTAGE IMO 9830252	50,550	2018	183 m	Hyundai - 6G50ME-B9	5.2	A
124	DORIC BREEZE IMO 9637129	51,565	2013	183 m	Hyundai - 6S50MC-C8	5.2	A
123	AMFITRION IMO 9724623	50,102	2017	183 m	Doosan - 6RT-flex50	5.2	A
126	STI BRONX IMO 9706839	49,990	2015	183 m	MAN - 6S50MC-C8	5.2	A
127	SEAWAYS OLIVE IMO 9354909	49,999	2008	183 m	Hyundai - 7S50MC-C	5.3	A
128	MP MR TANKER 1 IMO 9472763	51,755	2011	183 m	HHI - 6S50MC-C7	5.3	A
130	TABLE BAY IMO 9974979	50,000	2024	175 m	6G50ME-C9-HPSCR	5.3	A
129	PAG IMO 9440514	49,990	2015	183 m	MAN - 6S50ME-B9	5.3	A
133	MURMURE IMO 9939618	49,999	2025	183 m	MAN - 6G50ME-C9	5.3	A
132	CAPE ANDIAMO IMO 9995428	50,502	2024	183 m	MAN-B&W 6G50ME-C9	5.3	A
131	HAFNIA LEO IMO 9476824	49,999	2013	183 m	MAN - 6S50MC-C	5.3	A
134	ZOILO IMO 9704441	49,990	2015	183 m	HHI - 6G50ME-B9.3	5.3	A
136	ARDMORE SEAFOX IMO 9708215	49,999	2015	183 m	STX - 6S50ME-B9	5.3	A
135	HAFNIA LIBRA IMO 9617959	52,385	2013	183 m	DALIAN MARINE - 6S50MC-C	5.3	A
137	ACACIA IMO 9747352	49,999	2017	183 m	Hyundai - 6S50MC-B9	5.3	A
138	LEIKANGER IMO 9725304	49,999	2016	186 m	Hyundai - 6G50ME-B9.3-LGI (Tier-II)	5.3	A
139	CLEAROCEAN MESQUITE IMO 9919163	49,999	2021	183 m	Hyundai Heavy Industries Co. Ltd. 6G50ME-C9-HPSCR	5.3	A
140	CS ZHE JIANG IMO 9899478	47,497	2022	183 m	DALIAN MARINE - 6G50ME-C9	5.3	A
141	MERSEY IMO 9865752	49,999	2019	183 m	Hyundai - 6G50ME-C9	5.4	A
142	DEE4 MAHOGANY IMO 9942500	44,999	2022	183 m	6G50ME-C9-HPSCR	5.4	A
143	LARGO ENERGY IMO 9683984	49,973	2014	183 m	MAN - 6G50ME-B9	5.4	A
144	ION M IMO 9864344	49,999	2019	183 m	Hyundai - 6G50ME-C9	5.4	A
145	PACIFIC BLUE IMO 9867798	49,995	2020	183 m	STX - 6G50ME-C9 Tier II	5.4	A
148	SEAWAYS WAVE IMO 9387918	51,549	2009	183 m	STX - 6 S 50 MC-C	5.4	A
147	NAVIG8 EXECUTIVE IMO 9973937	49,143	2024	183 m	6G50ME-C9-HPSCR	5.4	A
146	POLARIS IMO 9682459	49,126	2014	183 m	Hyundai - 6G50ME-B9	5.4	A
149	NORD VENTURA IMO 9910337	49,999	2021	183 m	Hyundai - 6G50ME-C9	5.4	A
150	YASA ALBATROSS IMO 9857212	50,215	2019	183 m	Hyundai - 6G50ME-C9	5.4	A

Page 3 of 27 — 1,350 vessels

← Prev Next →

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.