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 |
|---|---|---|---|---|---|
| 1251 |
SONGA JADE
IMO 9473925
|
17,604 | 2009 |
15.3
|
E |
| 1252 |
SARAJEVO
IMO 9477490
|
11,320 | 2008 |
15.3
|
E |
| 1253 |
APATYTH
IMO 9970739
|
8,116 | 2024 |
15.3
|
E |
| 1254 |
ANNELIESE ESSBERGER
IMO 9295426
|
8,648 | 2005 |
15.3
|
E |
| 1255 |
HARBOUR FEATURE
IMO 9473092
|
16,909 | 2011 |
15.4
|
E |
| 1256 |
NORMAN
IMO 9125279
|
10,022 | 1996 |
15.4
|
E |
| 1257 |
SLOMAN HERAKLES
IMO 9466726
|
16,417 | 2012 |
15.4
|
E |
| 1258 |
TASING SWAN
IMO 9403891
|
11,336 | 2007 |
15.4
|
E |
| 1259 |
ILHAN BAYRAK
IMO 9956434
|
8,116 | 2023 |
15.4
|
E |
| 1260 |
BESIKTAS ZEALAND
IMO 9431044
|
18,289 | 2009 |
15.5
|
E |
| 1261 |
KAPIDAG
IMO 9034731
|
8,674 | 1992 |
15.5
|
E |
| 1262 |
SYDSTRAUM
IMO 9854478
|
10,191 | 2020 |
15.5
|
E |
| 1263 |
K ONSET
IMO 9359595
|
12,902 | 2006 |
15.6
|
E |
| 1264 |
LILY PG
IMO 9823390
|
7,330 | 2018 |
15.6
|
E |
| 1265 |
BRENTHOLMEN
IMO 9436393
|
16,850 | 2007 |
15.7
|
E |
| 1266 |
CHRISTINA
IMO 9118496
|
9,494 | 1996 |
15.8
|
E |
| 1267 |
FERICEK
IMO 9125267
|
10,106 | 1996 |
15.9
|
E |
| 1268 |
SEA DUCK
IMO 9443839
|
12,966 | 2007 |
15.9
|
E |
| 1269 |
NEW RANGER
IMO 9328326
|
12,951 | 2007 |
16.0
|
E |
| 1270 |
ALANGOVA
IMO 9411927
|
12,089 | 2008 |
16.0
|
E |
| 1271 |
TORC
IMO 9544683
|
13,214 | 2010 |
16.1
|
E |
| 1272 |
TRANS EXETER
IMO 9314753
|
9,437 | 2004 |
16.2
|
E |
| 1273 |
ARSLAND
IMO 9395989
|
16,791 | 2008 |
16.2
|
E |
| 1274 |
LASCAUX
IMO 9405746
|
11,674 | 2007 |
16.2
|
E |
| 1275 |
NAVE ATRIA
IMO 9459060
|
49,992 | 2012 |
16.3
|
E |
| 1276 |
GIULIA IEVOLI
IMO 9284439
|
13,776 | 2004 |
16.3
|
E |
| 1277 |
MAZU XIAO
IMO 9503940
|
7,739 | 2008 |
16.3
|
E |
| 1278 |
KIVALLIQ W.
IMO 9187409
|
13,671 | 2004 |
16.3
|
E |
| 1279 |
GOLFSTRAUM
IMO 9390991
|
9,595 | 2011 |
16.4
|
E |
| 1280 |
BERGSTRAUM
IMO 9108740
|
9,494 | 1996 |
16.5
|
E |
| 1281 |
STAV POWER
IMO 9267560
|
14,665 | 2005 |
16.5
|
E |
| 1282 |
ORIENTAL ACACIA
IMO 9553048
|
12,332 | 2011 |
16.5
|
E |
| 1283 |
MENTOR
IMO 9340374
|
13,013 | 2007 |
16.5
|
E |
| 1284 |
SONGA TAURUS
IMO 9373644
|
16,611 | 2009 |
16.5
|
E |
| 1285 |
ANCHOR 18
IMO 9406714
|
19,971 | 2009 |
16.5
|
E |
| 1286 |
EVA BERGEN
IMO 9800013
|
19,888 | 2018 |
16.5
|
E |
| 1287 |
TEQUILA
IMO 9345219
|
13,016 | 2004 |
16.6
|
E |
| 1288 |
SILENDI
IMO 9508720
|
19,964 | 2009 |
16.6
|
E |
| 1289 |
BALTIC
IMO 9451226
|
11,253 | 2020 |
16.6
|
E |
| 1290 |
ORIS GRACE
IMO 9658422
|
7,054 | 2012 |
16.6
|
E |
| 1291 |
SONGA CRYSTAL
IMO 9378321
|
12,927 | 2006 |
16.6
|
E |
| 1292 |
GOLDEN ORCHID
IMO 9486178
|
17,055 | 2009 |
16.6
|
E |
| 1293 |
IVER ABILITY
IMO 9327504
|
12,497 | 2006 |
16.6
|
E |
| 1294 |
ASKARA
IMO 9431886
|
10,744 | 2008 |
16.7
|
E |
| 1295 |
SUNLIT
IMO 9340386
|
13,065 | 2007 |
16.7
|
E |
| 1296 |
TINA THERESA
IMO 9478298
|
7,902 | 2009 |
16.7
|
E |
| 1297 |
RYSTRAUM
IMO 9391000
|
9,597 | 2012 |
16.7
|
E |
| 1298 |
AMALIE ESSBERGER
IMO 9314777
|
8,571 | 2005 |
16.8
|
E |
| 1299 |
NQ TULIPA
IMO 9312406
|
8,908 | 2004 |
16.8
|
E |
| 1300 |
ELISALEX SCHULTE
IMO 9439876
|
16,427 | 2006 |
16.8
|
E |
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.