Chemical Tanker Emissions & Retrofit Radar
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.
CII band distribution
415 at D/E1,698 rated vessels · 169 of the D/E set dock within 12 months
Docking pipeline — D/E vessels per quarter
Windows estimated from the class-expiry docking model, not bookings.
Top eligible retrofit measures for this segment
| Measure | Eligible | CO₂ reduction | Capex band | Payback | Confidence |
|---|---|---|---|---|---|
| Propeller redesign / replacement | 1,272 | 5–10% | €400k–1,200k | — | vendor claim |
| Turbocharger cut-out | 1,234 | 1–3% | €80k–250k | — | vendor claim |
| Rotor sails (per unit) | 1,077 | route-dependent | €1,500k–3,500k | — | vendor claim |
| Suction wing sails (per unit) | 1,077 | route-dependent | €1,000k–2,500k | — | vendor claim |
| Bulbous bow reprofiling | 915 | 2–6% | €300k–900k | — | vendor claim |
| Methanol dual-fuel conversion | 686 | 5–15% | €8,000k–20,000k | — | vendor claim |
Capex bands are indicative vendor/literature priors. Payback appears once price parameters are configured.
Retrofit opportunity in this segment
Retrofit prospects — worst band first
| Vessel | Band | Age | Drop year |
|---|---|---|---|
| MEHTAP · 25-60k | E | 18y | 2026 |
| MARIA IMMACULATA · <25k | E | 18y | 2026 |
| HARBOUR PROGRESS · <25k | E | 16y | 2026 |
| HERCULES SKY · <25k | E | 5y | 2026 |
| NAVE ATRIA · 25-60k | E | 14y | 2026 |
| # | Vessel | Size (DWT) | Built | Carbon intensity — AER (g CO₂/dwt·nm) | Grade |
|---|---|---|---|---|---|
| 602 |
COURAGE
IMO 9335056
|
45,965 | 2008 |
7.6
|
C |
| 601 |
DORADO CHEM
IMO 9296119
|
40,952 | 2005 |
7.6
|
C |
| 603 |
AQUARIUS
IMO 9354272
|
34,999 | 2007 |
7.6
|
C |
| 605 |
SILVER MANOORA
IMO 9718844
|
49,897 | 2013 |
7.6
|
C |
| 604 |
KRITI RUBY
IMO 9391282
|
50,349 | 2006 |
7.6
|
C |
| 606 |
TORM LEADER
IMO 9343194
|
46,070 | 2009 |
7.6
|
C |
| 607 |
DORIC BREEZE
IMO 9637129
|
51,565 | 2013 |
7.6
|
C |
| 608 |
GULF FANATIR
IMO 9359868
|
45,920 | 2008 |
7.6
|
C |
| 610 |
GOLDEN THETIS
IMO 1037701
|
25,918 | 2025 |
7.6
|
C |
| 609 |
SC VIRGO
IMO 9801093
|
40,870 | 2018 |
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 |
THE JUDGE
IMO 9755725
|
37,770 | 2016 |
7.6
|
C |
| 615 |
CHEMROAD WING
IMO 9309502
|
32,051 | 2005 |
7.6
|
C |
| 617 |
STOLT PRIDE
IMO 9680073
|
38,961 | 2016 |
7.7
|
C |
| 616 |
HATAY
IMO 9354258
|
51,218 | 2006 |
7.7
|
C |
| 618 |
ORLANDO
IMO 9420851
|
38,334 | 2009 |
7.7
|
C |
| 619 |
AL REEM
IMO 9430296
|
46,046 | 2010 |
7.7
|
C |
| 620 |
HACI KEMAL KA
IMO 9315757
|
37,627 | 2003 |
7.7
|
C |
| 621 |
THEANOULA
IMO 9935557
|
39,855 | 2022 |
7.7
|
C |
| 623 |
STOLT BRELAND
IMO 9414084
|
43,475 | 2010 |
7.7
|
C |
| 622 |
SEAPRIDE
IMO 9629562
|
50,660 | 2011 |
7.7
|
C |
| 625 |
STOLT CALLUNA
IMO 9744893
|
32,771 | 2017 |
7.7
|
C |
| 624 |
YANKUL SILVER
IMO 9718791
|
45,923 | 2016 |
7.7
|
C |
| 626 |
STI WEMBLEY
IMO 9691735
|
38,734 | 2014 |
7.7
|
C |
| 627 |
ROOIBOS GALAXY
IMO 9920306
|
19,993 | 2022 |
7.7
|
C |
| 628 |
CIELO DI NEW YORK
IMO 9669665
|
39,990 | 2014 |
7.7
|
C |
| 629 |
BOCHEM CASABLANCA
IMO 9956410
|
26,644 | 2021 |
7.7
|
C |
| 630 |
BOW GEMINI
IMO 9752034
|
40,895 | 2017 |
7.7
|
C |
| 632 |
BOCHEM OSLO
IMO 9420710
|
33,654 | 2010 |
7.8
|
C |
| 631 |
MTM TORTOLA
IMO 9742065
|
22,396 | 2016 |
7.8
|
C |
| 633 |
DALE
IMO 9353084
|
37,280 | 2008 |
7.8
|
C |
| 634 |
AKTI A
IMO 9935569
|
39,847 | 2022 |
7.8
|
C |
| 635 |
SAKURA BELLE
IMO 9568500
|
26,960 | 2011 |
7.8
|
C |
| 636 |
SHENGHUI GLORY
IMO 9724037
|
19,883 | 2015 |
7.8
|
C |
| 638 |
BOW FIRDA
IMO 9250751
|
37,427 | 2003 |
7.8
|
C |
| 637 |
NCC HUDA
IMO 9399272
|
45,459 | 2011 |
7.8
|
C |
| 641 |
STOLT SAGALAND
IMO 9352200
|
44,044 | 2008 |
7.8
|
C |
| 640 |
GINGA BLUE SHARK
IMO 9804837
|
25,202 | 2019 |
7.8
|
C |
| 639 |
CHEMROAD HOPE
IMO 9565754
|
33,552 | 2011 |
7.8
|
C |
| 642 |
CAROLE M
IMO 9732797
|
37,596 | 2016 |
7.8
|
C |
| 643 |
STOLT BISMUTH
IMO 9739290
|
27,570 | 2016 |
7.9
|
C |
| 648 |
CHEM NICHOLAS
IMO 9374416
|
38,396 | 2007 |
7.9
|
C |
| 647 |
SEA CUMULUS
IMO 9724532
|
39,999 | 2016 |
7.9
|
C |
| 646 |
BERNICE
IMO 9220926
|
42,721 | 2001 |
7.9
|
C |
| 645 |
BAGHEERA
IMO 9670949
|
39,999 | 2014 |
7.9
|
C |
| 644 |
CHEM RAMBLAS
IMO 9937995
|
33,374 | 2024 |
7.9
|
C |
| 649 |
SERENGETI PARK
IMO 9992579
|
19,970 | 2025 |
7.9
|
C |
| 650 |
NOCTURNE
IMO 9804863
|
37,245 | 2020 |
7.9
|
C |
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.
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.