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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)
#607 of 1,422 chemical tankers
CO₂ intensity
7.6 g CO₂/dwt·nm
vs segment average (9.4)
-19% greener
C
1,451
vessels ranked
3.48
greenest (g CO₂/t·nm)
8.28
segment median
# Vessel Size (DWT) Built Carbon intensity — AER (g CO₂/dwt·nm) Grade
600 COURAGE
IMO 9335056
45,965 2008
7.6
C
602 AQUARIUS
IMO 9354272
34,999 2007
7.6
C
603 TORM LEADER
IMO 9343194
46,070 2009
7.6
C
604 SILVER MANOORA
IMO 9718844
49,897 2016
7.6
C
605 DORIC BREEZE
IMO 9637129
51,565 2013
7.6
C
606 KRITI RUBY
IMO 9391282
50,349 2008
7.6
C
608 GULF FANATIR
IMO 9359868
45,920 2008
7.6
C
607 BURAN
IMO 1031783
18,550 2025
7.6
C
610 SC VIRGO
IMO 9801093
40,870 2018
7.6
C
609 GOLDEN THETIS
IMO 1037701
25,918 2025
7.6
C
611 STOLT ENDURANCE
IMO 9284697
32,858 2004
7.6
C
612 FAITHFUL STAR
IMO 9228320
34,465 2000
7.6
C
613 OPERA
IMO 9804887
37,245 2020
7.6
C
614 BOCHEM SHANGHAI
IMO 9956422
25,000 2024
7.6
C
615 THE JUDGE
IMO 9755725
37,770 2016
7.6
C
616 CHEMROAD WING
IMO 9309502
32,051 2005
7.6
C
618 STOLT PRIDE
IMO 9680073
38,961 2016
7.7
C
617 HATAY
IMO 9354258
51,218 2005
7.7
C
619 ORLANDO
IMO 9420851
38,334 2009
7.7
C
620 AL REEM
IMO 9430296
46,046 2010
7.7
C
621 HACI KEMAL KA
IMO 9315757
37,627 2003
7.7
C
624 STOLT BRELAND
IMO 9414084
43,475 2010
7.7
C
623 SEAPRIDE
IMO 9629562
50,660 2013
7.7
C
622 THEANOULA
IMO 9935557
39,855 2022
7.7
C
625 YANKUL SILVER
IMO 9718791
45,923 2016
7.7
C
626 STOLT CALLUNA
IMO 9744893
32,771 2017
7.7
C
628 STI WEMBLEY
IMO 9691735
38,734 2014
7.7
C
627 ROOIBOS GALAXY
IMO 9920306
19,993 2022
7.7
C
629 CIELO DI NEW YORK
IMO 9669665
39,990 2014
7.7
C
631 BOCHEM CASABLANCA
IMO 9956410
26,644 2021
7.7
C
630 BOW GEMINI
IMO 9752034
40,895 2017
7.7
C
633 BOCHEM OSLO
IMO 9420710
33,654 2006
7.8
C
632 MTM TORTOLA
IMO 9742065
22,396 2016
7.8
C
634 DALE
IMO 9353084
37,280 2008
7.8
C
635 AKTI A
IMO 9935569
39,847 2022
7.8
C
636 SAKURA BELLE
IMO 9568500
26,960 2011
7.8
C
638 NCC HUDA
IMO 9399272
45,459 2011
7.8
C
637 SHENGHUI GLORY
IMO 9724037
19,883 2015
7.8
C
639 BOW FIRDA
IMO 9250751
37,427 2003
7.8
C
640 STOLT SAGALAND
IMO 9352200
44,044 2008
7.8
C
642 GINGA BLUE SHARK
IMO 9804837
25,202 2019
7.8
C
641 CHEMROAD HOPE
IMO 9565754
33,552 2011
7.8
C
643 CAROLE M
IMO 9732797
37,596 2016
7.8
C
644 STOLT BISMUTH
IMO 9739290
27,570 2016
7.9
C
649 BERNICE
IMO 9220926
42,721 2001
7.9
C
648 CHEM RAMBLAS
IMO 9937995
33,374 2024
7.9
C
647 BAGHEERA
IMO 9670949
39,999 2014
7.9
C
646 SEA CUMULUS
IMO 9724532
39,999 2016
7.9
C
645 CHEM NICHOLAS
IMO 9374416
38,396 2007
7.9
C
650 SERENGETI PARK
IMO 9992579
19,970 2025
7.9
C
Page 13 of 29 — 1,422 vessels
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.