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 2024. 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 |
|---|---|---|---|---|---|
| 751 |
ANTARES
IMO 9723019
|
37,867 | 2015 |
9.3
|
C |
| 752 |
SERENA M
IMO 9444508
|
34,999 | 2010 |
9.4
|
C |
| 753 |
ASTERION
IMO 9595125
|
37,583 | 2011 |
9.4
|
C |
| 754 |
STOLT SEQUOIA
IMO 9235062
|
37,620 | 2003 |
9.4
|
C |
| 755 |
LYDIA KA
IMO 9314844
|
37,258 | 2007 |
9.4
|
C |
| 756 |
NORDIC MASA
IMO 9451410
|
20,819 | 2009 |
9.4
|
C |
| 757 |
STROMBOLI M
IMO 9595137
|
37,583 | 2011 |
9.4
|
C |
| 758 |
OASIS
IMO 9512173
|
26,199 | 2011 |
9.4
|
C |
| 759 |
ARDMORE CHIPPEWA
IMO 9707871
|
25,211 | 2013 |
9.4
|
C |
| 760 |
BIXBITE
IMO 9316610
|
39,999 | 2009 |
9.4
|
C |
| 761 |
FUTURA
IMO 9293961
|
40,085 | 2006 |
9.4
|
C |
| 762 |
SHENGHUI GLORY
IMO 9724037
|
19,883 | 2015 |
9.5
|
C |
| 763 |
PVT JUPITER
IMO 9408803
|
20,832 | 2008 |
9.5
|
C |
| 764 |
FAIRCHEM HAWK
IMO 9804813
|
19,956 | 2019 |
9.5
|
C |
| 765 |
GINGA ENDURANCE
IMO 9800441
|
25,986 | 2020 |
9.5
|
C |
| 766 |
BOW EXCELLENCE
IMO 9828223
|
38,235 | 2020 |
9.5
|
C |
| 767 |
MAGIC STAR
IMO 9420253
|
38,423 | 2009 |
9.5
|
C |
| 768 |
MARVEA
IMO 9301897
|
39,999 | 2006 |
9.5
|
C |
| 769 |
BOW PANTHER
IMO 9952153
|
26,001 | 2022 |
9.5
|
C |
| 770 |
LILAC RAY
IMO 9883481
|
21,028 | 2020 |
9.5
|
C |
| 771 |
CUTLASS GALAXY
IMO 9746164
|
19,985 | 2015 |
9.5
|
C |
| 772 |
PURPLE RAY
IMO 9804899
|
19,987 | 2020 |
9.5
|
C |
| 773 |
CAPIBARA
IMO 9267027
|
38,877 | 2004 |
9.6
|
C |
| 774 |
STOLT SYCAMORE
IMO 9198563
|
37,622 | 2000 |
9.6
|
C |
| 775 |
EASTERLY JUPITER
IMO 9383962
|
36,677 | 2009 |
9.6
|
C |
| 776 |
THUN LONDON
IMO 9828986
|
18,684 | 2019 |
9.6
|
C |
| 777 |
RF MARINA
IMO 9580986
|
19,100 | 2011 |
9.6
|
C |
| 778 |
RADIANT RAY
IMO 9749697
|
19,974 | 2018 |
9.6
|
C |
| 779 |
DM BEA
IMO 9674763
|
25,932 | 2013 |
9.6
|
C |
| 780 |
INDIGO RAY
IMO 9716016
|
19,989 | 2016 |
9.6
|
C |
| 781 |
SEYCHELLES PIONEER
IMO 9255517
|
37,500 | 2005 |
9.6
|
C |
| 782 |
BIT WAVE
IMO 9904041
|
13,822 | 2022 |
9.6
|
C |
| 783 |
CHEM SILICON
IMO 9829681
|
19,977 | 2018 |
9.6
|
C |
| 784 |
STOLT BASUTO
IMO 9351543
|
25,197 | 2006 |
9.7
|
C |
| 785 |
MARQUETTE
IMO 9732785
|
37,596 | 2016 |
9.7
|
C |
| 786 |
GINGA BOBCAT
IMO 9472737
|
25,954 | 2010 |
9.7
|
C |
| 787 |
STOLT ZULU
IMO 9351531
|
25,197 | 2006 |
9.7
|
C |
| 788 |
STOLT LOTUS
IMO 9617648
|
30,345 | 2014 |
9.7
|
C |
| 789 |
HAZAR
IMO 9290830
|
37,270 | 2005 |
9.7
|
C |
| 790 |
EASTERLY EAGLE
IMO 9423750
|
25,390 | 2010 |
9.7
|
C |
| 791 |
MTM HOUSTON
IMO 9505924
|
19,741 | 2010 |
9.8
|
C |
| 792 |
CHEM BARCELONA
IMO 9725835
|
19,997 | 2016 |
9.8
|
C |
| 793 |
RUDOLF SCHULTE
IMO 9576765
|
25,581 | 2011 |
9.8
|
C |
| 794 |
EVA TOKYO
IMO 9865520
|
19,841 | 2019 |
9.8
|
C |
| 795 |
TERN SEA
IMO 9747974
|
14,878 | 2016 |
9.8
|
C |
| 796 |
FAIRCHEM SABRE
IMO 9657478
|
19,994 | 2013 |
9.8
|
C |
| 797 |
KOMODO PARK
IMO 9981465
|
19,981 | 2024 |
9.8
|
C |
| 798 |
CHEM NEW ORLEANS
IMO 9705756
|
19,996 | 2015 |
9.8
|
C |
| 799 |
CHEMICAL HUNTER
IMO 9758789
|
16,081 | 2015 |
9.9
|
C |
| 800 |
CHEM COBALT
IMO 9740770
|
19,990 | 2016 |
9.9
|
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 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.