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.
| # | Vessel | Size (DWT) | Built | Carbon intensity — AER (g CO₂/dwt·nm) | Grade |
|---|---|---|---|---|---|
| 801 |
CHEM COBALT
IMO 9740770
|
19,990 | 2016 |
9.9
|
C |
| 802 |
CHEMICAL HUNTER
IMO 9758789
|
16,081 | 2015 |
9.9
|
C |
| 803 |
STRINDA
IMO 9330771
|
19,959 | 2006 |
9.9
|
C |
| 804 |
CYPRESS GALAXY
IMO 9379973
|
20,758 | 2007 |
9.9
|
C |
| 805 |
BOMAR OSPREY
IMO 9396024
|
25,431 | 2009 |
9.9
|
C |
| 806 |
GINGA CHEETAH
IMO 9414216
|
26,100 | 2007 |
9.9
|
C |
| 807 |
LAVENDER RAY
IMO 9740794
|
19,994 | 2017 |
9.9
|
C |
| 808 |
CHEM AMSTERDAM
IMO 9640138
|
19,801 | 2013 |
9.9
|
C |
| 809 |
SW CAP FERRAT I
IMO 9231614
|
38,269 | 2002 |
9.9
|
C |
| 810 |
NAEBA GALAXY
IMO 9791169
|
26,196 | 2018 |
9.9
|
C |
| 811 |
SOLAR NESRIN
IMO 9877626
|
25,039 | 2020 |
9.9
|
D |
| 812 |
FAIRCHEM SWORD
IMO 9673678
|
19,993 | 2013 |
9.9
|
D |
| 813 |
TEAL RAY
IMO 9838668
|
19,999 | 2019 |
10.0
|
D |
| 814 |
MED PACIFIC
IMO 9461934
|
26,234 | 2012 |
10.0
|
D |
| 815 |
WILLARD J
IMO 9749362
|
25,161 | 2016 |
10.0
|
D |
| 816 |
BOMAR HAWK
IMO 9396000
|
25,385 | 2008 |
10.0
|
D |
| 817 |
ORCHID KEFALONIA
IMO 9363821
|
19,971 | 2008 |
10.0
|
D |
| 818 |
CB CARIBIC
IMO 9851713
|
37,822 | 2020 |
10.0
|
D |
| 819 |
ORIENTAL JASMINE
IMO 9743760
|
16,064 | 2015 |
10.0
|
D |
| 820 |
EASTERLY SYMPHONY
IMO 9464560
|
36,677 | 2009 |
10.0
|
D |
| 821 |
CHEMICAL FIGHTER
IMO 9900459
|
15,950 | 2020 |
10.0
|
D |
| 822 |
GINGA HAWK
IMO 9222651
|
19,998 | 2000 |
10.0
|
D |
| 823 |
AQUARIUS
IMO 9354272
|
34,999 | 2007 |
10.1
|
D |
| 824 |
STOLT KIRI
IMO 9266231
|
19,508 | 2003 |
10.1
|
D |
| 825 |
NORDIC MARI
IMO 9422677
|
19,355 | 2010 |
10.1
|
D |
| 826 |
G SILVER
IMO 9324215
|
19,887 | 2004 |
10.1
|
D |
| 827 |
FAIRCHEM ROOIBOS
IMO 9920306
|
19,993 | 2022 |
10.1
|
D |
| 828 |
CHEM LITHIUM
IMO 9815252
|
19,981 | 2017 |
10.1
|
D |
| 829 |
ORIENTAL COSMOS
IMO 9800049
|
16,296 | 2015 |
10.1
|
D |
| 830 |
TERN OCEAN
IMO 9747986
|
14,827 | 2017 |
10.1
|
D |
| 831 |
PVT CLARA
IMO 9442548
|
20,831 | 2009 |
10.1
|
D |
| 832 |
CHEM SINGAPORE
IMO 9705768
|
19,996 | 2015 |
10.1
|
D |
| 833 |
SCARLET RAY
IMO 9799654
|
19,974 | 2020 |
10.1
|
D |
| 834 |
VARI TRADER
IMO 9800025
|
19,803 | 2018 |
10.1
|
D |
| 835 |
SWAN PACIFIC
IMO 9749805
|
19,997 | 2016 |
10.2
|
D |
| 836 |
STOLT SPAN
IMO 9149524
|
22,273 | 1999 |
10.2
|
D |
| 837 |
WAN HE
IMO 9248461
|
24,404 | 2002 |
10.2
|
D |
| 838 |
CHEMICAL CHALLENGER
IMO 9743758
|
16,111 | 2015 |
10.2
|
D |
| 839 |
REBECCA SCHULTE
IMO 9576753
|
25,620 | 2011 |
10.2
|
D |
| 840 |
EASTERLY AS OMARIA
IMO 9363819
|
19,973 | 2007 |
10.2
|
D |
| 841 |
RED OPAL
IMO 9381512
|
40,099 | 2010 |
10.2
|
D |
| 842 |
PRABHU NAND
IMO 9425980
|
19,997 | 2008 |
10.3
|
D |
| 843 |
MAGNIFICA
IMO 9374234
|
39,999 | 2009 |
10.3
|
D |
| 844 |
MELATI 7
IMO 9172272
|
31,960 | 2000 |
10.3
|
D |
| 845 |
CHEM MERCURY
IMO 9815276
|
19,971 | 2018 |
10.3
|
D |
| 846 |
BOW CHAIN
IMO 9214317
|
37,518 | 2002 |
10.3
|
D |
| 847 |
DAMSGAARD
IMO 9724453
|
19,996 | 2016 |
10.3
|
D |
| 848 |
REINHOLD SCHULTE
IMO 9576789
|
25,583 | 2012 |
10.3
|
D |
| 849 |
RICHMOND PARK
IMO 9624782
|
21,313 | 2012 |
10.3
|
D |
| 850 |
NORDIC AMI
IMO 9800051
|
16,240 | 2019 |
10.3
|
D |
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.
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.