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 |
|---|---|---|---|---|---|
| 1051 |
STOLT SUN
IMO 9149512
|
22,198 | 2000 |
11.3
|
D |
| 1052 |
HYDE PARK
IMO 9725861
|
19,994 | 2017 |
11.3
|
D |
| 1053 |
MT BANDIRMA
IMO 9120243
|
9,584 | 1996 |
11.3
|
D |
| 1054 |
CLYDE
IMO 9298416
|
12,984 | 2005 |
11.3
|
D |
| 1055 |
ORIENTAL DAPHNE
IMO 9882736
|
16,267 | 2020 |
11.4
|
D |
| 1056 |
PRABHU LAL
IMO 9416044
|
19,859 | 2008 |
11.4
|
D |
| 1057 |
TG ARIES
IMO 9485849
|
19,956 | 2012 |
11.4
|
D |
| 1058 |
STOLT EFFORT
IMO 9178202
|
37,155 | 1999 |
11.4
|
D |
| 1059 |
FG ROTTERDAM
IMO 9485863
|
19,995 | 2012 |
11.4
|
D |
| 1060 |
CHEM NEW YORK
IMO 9705732
|
19,994 | 2014 |
11.4
|
D |
| 1061 |
DAMSGAARD
IMO 9724453
|
19,998 | 2016 |
11.5
|
D |
| 1062 |
TG VIRGO
IMO 9416109
|
19,954 | 2009 |
11.5
|
D |
| 1063 |
THERESA GALAXY
IMO 9317195
|
19,988 | 2005 |
11.5
|
D |
| 1064 |
GINGA SUNBIRD
IMO 9926568
|
25,160 | 2022 |
11.5
|
D |
| 1065 |
UNDA
IMO 9511234
|
9,087 | 2009 |
11.5
|
D |
| 1066 |
CHEM HOUSTON
IMO 9705720
|
19,997 | 2014 |
11.5
|
D |
| 1067 |
CYGNI
IMO 9427990
|
14,374 | 2010 |
11.6
|
D |
| 1068 |
SOLAR SKYLER
IMO 9877640
|
25,039 | 2018 |
11.6
|
D |
| 1069 |
RICHMOND PARK
IMO 9624782
|
21,313 | 2012 |
11.6
|
D |
| 1070 |
HURON
IMO 9457878
|
21,224 | 2010 |
11.6
|
D |
| 1071 |
LOEVSTAKKEN
IMO 9724441
|
19,995 | 2015 |
11.6
|
D |
| 1072 |
TRISTAR NATASHA
IMO 9721748
|
19,801 | 2016 |
11.6
|
D |
| 1073 |
SIGAIA THERESA
IMO 9748710
|
12,661 | 2015 |
11.6
|
D |
| 1074 |
GOLDEN MAPLE
IMO 1055868
|
18,406 | 2025 |
11.6
|
D |
| 1075 |
GULLFJELLET
IMO 9724439
|
19,975 | 2015 |
11.6
|
D |
| 1076 |
FAIRCHEM ALDEBARAN
IMO 9552666
|
19,697 | 2017 |
11.7
|
D |
| 1077 |
CUMBRIAN
IMO 9298404
|
12,921 | 2004 |
11.7
|
D |
| 1078 |
MOYRA
IMO 9271999
|
19,806 | 2005 |
11.7
|
D |
| 1079 |
THUN LUNDY
IMO 9837872
|
18,684 | 2020 |
11.7
|
D |
| 1080 |
MED ATLANTIC
IMO 9410533
|
26,234 | 2011 |
11.8
|
D |
| 1081 |
TRANS SEA
IMO 9956927
|
12,598 | 2023 |
11.8
|
D |
| 1082 |
WINDSOR
IMO 9542130
|
19,997 | 2010 |
11.8
|
D |
| 1083 |
SONGA POLARIS
IMO 9457749
|
25,145 | 2011 |
11.8
|
D |
| 1084 |
CHEMICAL MASTER
IMO 9558957
|
14,298 | 2009 |
11.8
|
D |
| 1085 |
XANTHIA
IMO 9246152
|
17,031 | 2003 |
11.8
|
D |
| 1086 |
EVA FUKUOKA
IMO 9989182
|
25,298 | 2024 |
11.8
|
D |
| 1087 |
SOLERO
IMO 9428085
|
19,992 | 2009 |
11.8
|
D |
| 1088 |
TERNSUND
IMO 9722390
|
14,847 | 2016 |
11.8
|
D |
| 1089 |
ARKOS
IMO 9286827
|
13,700 | 2004 |
11.9
|
D |
| 1090 |
STOLT STREAM
IMO 9169940
|
22,199 | 2000 |
11.9
|
D |
| 1091 |
LATANA
IMO 9186352
|
15,990 | 2000 |
11.9
|
D |
| 1092 |
THUN LONDON
IMO 9828986
|
18,684 | 2019 |
11.9
|
D |
| 1093 |
OLYMPIC SPIRIT
IMO 9327097
|
24,035 | 2005 |
11.9
|
D |
| 1094 |
YC AZALEA
IMO 9272682
|
19,997 | 2004 |
11.9
|
D |
| 1095 |
CHEM MERCURY
IMO 9815276
|
19,971 | 2018 |
11.9
|
D |
| 1096 |
CETI
IMO 9427988
|
14,353 | 2009 |
11.9
|
D |
| 1097 |
MAGENTA RAY
IMO 9829722
|
19,998 | 2019 |
11.9
|
D |
| 1098 |
AMAGI GALAXY
IMO 9490313
|
26,198 | 2010 |
12.0
|
D |
| 1099 |
CARPE DIEM
IMO 9428815
|
25,175 | 2006 |
12.0
|
D |
| 1100 |
MISTRAL EXPLORER
IMO 9624770
|
21,323 | 2012 |
12.0
|
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 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.