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
414 at D/E1,698 rated vessels · 175 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 | 1,299 | 5–10% | €400k–1,200k | — | vendor claim |
| Turbocharger cut-out | 968 | 1–3% | €80k–250k | — | vendor claim |
| Bulbous bow reprofiling | 929 | 2–6% | €300k–900k | — | vendor claim |
| Rotor sails (per unit) | 882 | route-dependent | €1,500k–3,500k | — | vendor claim |
| Suction wing sails (per unit) | 882 | route-dependent | €1,000k–2,500k | — | vendor claim |
| Methanol dual-fuel conversion | 696 | 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 | 14y | 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 |
|---|---|---|---|---|---|
| 501 |
LADY MARIELLA
IMO 9644433
|
39,316 | 2013 |
6.9
|
B |
| 502 |
DDELPHINUS 12
IMO 9359375
|
46,011 | 2010 |
6.9
|
B |
| 503 |
LADYBUG
IMO 9391385
|
37,527 | 2008 |
6.9
|
B |
| 504 |
MONARCH
IMO 9461661
|
49,999 | 2011 |
6.9
|
B |
| 505 |
MARQUETTE
IMO 9732785
|
37,596 | 2016 |
6.9
|
B |
| 507 |
NCC SHAMS
IMO 9459010
|
45,468 | 2012 |
6.9
|
B |
| 506 |
STORE BAY
IMO 9733698
|
30,711 | 2015 |
6.9
|
B |
| 510 |
INTERMEZZO
IMO 9804825
|
37,328 | 2019 |
6.9
|
B |
| 509 |
MEDALTA ADVENTURER
IMO 9761451
|
30,727 | 2015 |
6.9
|
B |
| 508 |
BOW ELM
IMO 9388302
|
46,098 | 2011 |
6.9
|
B |
| 511 |
HAFNIA TURQUOISE
IMO 9753674
|
49,516 | 2016 |
7.0
|
B |
| 512 |
BOW LIND
IMO 9388314
|
46,047 | 2011 |
7.0
|
B |
| 514 |
MRC NAZENDE
IMO 9419735
|
51,291 | 2009 |
7.0
|
B |
| 513 |
ARDMORE ENDURANCE
IMO 9654567
|
49,466 | 2013 |
7.0
|
B |
| 515 |
HAFNIA VIOLETTE
IMO 9690626
|
49,126 | 2015 |
7.0
|
B |
| 516 |
FAUSKANGER
IMO 9387700
|
46,180 | 2009 |
7.0
|
B |
| 517 |
MARLIN AMMOLITE
IMO 9697246
|
49,999 | 2016 |
7.0
|
B |
| 518 |
RED GARNET
IMO 9694359
|
49,999 | 2015 |
7.0
|
B |
| 519 |
STOLT COURAGE
IMO 9296731
|
32,858 | 2004 |
7.0
|
B |
| 520 |
VALLE SOLE
IMO 9635781
|
49,999 | 2013 |
7.0
|
B |
| 521 |
MANDAL
IMO 9732773
|
37,596 | 2016 |
7.0
|
B |
| 522 |
BOW FLORA
IMO 9143207
|
37,369 | 1998 |
7.0
|
B |
| 524 |
PTI NILE
IMO 9747338
|
49,999 | 2014 |
7.0
|
B |
| 523 |
STENA IMPECCABLE
IMO 9693020
|
49,737 | 2017 |
7.0
|
B |
| 525 |
GRANDE RIVIERE
IMO 9733686
|
30,732 | 2015 |
7.0
|
B |
| 527 |
SC SCORPIO
IMO 9801079
|
40,964 | 2017 |
7.0
|
B |
| 526 |
JIPRO NEFTIS
IMO 9459292
|
34,858 | 2011 |
7.0
|
B |
| 528 |
MERAPI
IMO 9430167
|
46,872 | 2006 |
7.0
|
B |
| 529 |
IONIAN SEA
IMO 9322384
|
48,315 | 2005 |
7.1
|
B |
| 531 |
VINJERAC
IMO 9489194
|
49,999 | 2011 |
7.1
|
B |
| 530 |
STENA IMPRESSION
IMO 9667461
|
49,776 | 2015 |
7.1
|
B |
| 532 |
ASPROUDA
IMO 9478729
|
74,011 | 2013 |
7.1
|
B |
| 533 |
NCC QASSIM
IMO 9306811
|
46,038 | 2006 |
7.1
|
B |
| 534 |
CIELO DI SALERNO
IMO 9717292
|
39,309 | 2016 |
7.1
|
B |
| 535 |
DIVA
IMO 9760548
|
37,296 | 2017 |
7.1
|
B |
| 536 |
NCC NAJEM
IMO 9459022
|
45,499 | 2012 |
7.1
|
B |
| 538 |
NAVIG8 EXCEL
IMO 9973901
|
49,127 | 2024 |
7.1
|
B |
| 537 |
AQUADISIAC
IMO 9396713
|
50,695 | 2008 |
7.1
|
B |
| 539 |
STOLT APAL
IMO 9719240
|
32,798 | 2016 |
7.1
|
B |
| 540 |
SOLAR SHERIDAN
IMO 9877652
|
25,039 | 2021 |
7.1
|
B |
| 542 |
LINUS P
IMO 9749350
|
32,247 | 2014 |
7.1
|
B |
| 543 |
AMIF
IMO 9396373
|
40,429 | 2008 |
7.1
|
B |
| 541 |
VELEBIT
IMO 9455741
|
49,999 | 2011 |
7.1
|
B |
| 544 |
BOW TRAJECTORY
IMO 9669873
|
49,622 | 2014 |
7.1
|
B |
| 545 |
BRISTOL TRADER
IMO 9737101
|
35,863 | 2016 |
7.2
|
B |
| 546 |
TG CRAB
IMO 9400394
|
33,624 | 2009 |
7.2
|
B |
| 550 |
SKYLIGHT
IMO 9396737
|
50,926 | 2008 |
7.2
|
B |
| 549 |
BOW HERCULES
IMO 9752046
|
40,847 | 2017 |
7.2
|
B |
| 548 |
STOLT PONDO
IMO 9374521
|
33,232 | 2007 |
7.2
|
B |
| 547 |
HENG HUI YONG WANG
IMO 9294288
|
34,614 | 2004 |
7.2
|
B |
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.