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 |
|---|---|---|---|---|---|
| 501 |
GREEN SPINEL
IMO 9583653
|
51,034 | 2012 |
7.4
|
B |
| 502 |
GREAT EASTERN
IMO 9298739
|
37,515 | 2005 |
7.5
|
B |
| 504 |
STOLT EBONY
IMO 9744908
|
32,786 | 2017 |
7.5
|
B |
| 503 |
BRAVE
IMO 9335068
|
45,953 | 2008 |
7.5
|
B |
| 507 |
STOLT VIRTUE
IMO 9274317
|
25,230 | 2004 |
7.5
|
B |
| 506 |
TARANGER
IMO 9524762
|
45,372 | 2011 |
7.5
|
B |
| 505 |
CHEMROAD QUEST
IMO 9451288
|
34,832 | 2010 |
7.5
|
B |
| 511 |
INTERMEZZO
IMO 9804825
|
37,328 | 2019 |
7.5
|
B |
| 510 |
GELIBOLU
IMO 9314832
|
37,311 | 2006 |
7.5
|
B |
| 509 |
GLOBAL GLORY
IMO 9821859
|
39,787 | 2019 |
7.5
|
B |
| 508 |
NCC MAHA
IMO 9387683
|
46,265 | 2009 |
7.5
|
B |
| 513 |
STOLT SAGALAND
IMO 9352200
|
44,044 | 2008 |
7.5
|
B |
| 512 |
BOW HARMONY
IMO 9379909
|
33,619 | 2008 |
7.5
|
B |
| 515 |
MTM DUBLIN
IMO 9335824
|
33,682 | 2007 |
7.5
|
B |
| 514 |
WECO MADELEINE
IMO 9693824
|
49,708 | 2016 |
7.5
|
B |
| 516 |
ALDEBARAN
IMO 9723007
|
37,887 | 2014 |
7.5
|
B |
| 517 |
HAFNIA ADAMITE
IMO 9727546
|
38,506 | 2013 |
7.5
|
B |
| 518 |
SEA STRATUS
IMO 9724556
|
39,999 | 2017 |
7.5
|
B |
| 521 |
BOW COMPASS
IMO 9412737
|
33,609 | 2009 |
7.5
|
B |
| 520 |
RED GARNET
IMO 9694359
|
49,999 | 2015 |
7.5
|
B |
| 519 |
ARS ET LABOUR
IMO 9396385
|
40,416 | 2008 |
7.5
|
B |
| 522 |
KRITI SAILOR
IMO 9335135
|
37,448 | 2007 |
7.6
|
B |
| 523 |
MALBEC LEGACY
IMO 9732826
|
37,596 | 2016 |
7.6
|
B |
| 524 |
RED DIAMOND
IMO 9583665
|
51,034 | 2012 |
7.6
|
B |
| 525 |
STOLT ARGON
IMO 9739288
|
27,579 | 2016 |
7.6
|
B |
| 528 |
UACC SHAMIYA
IMO 9458858
|
45,479 | 2011 |
7.6
|
B |
| 527 |
BOW FORTUNE
IMO 9168635
|
37,395 | 1999 |
7.6
|
B |
| 526 |
BOW HERCULES
IMO 9752046
|
40,847 | 2017 |
7.6
|
B |
| 529 |
VELOS TOPAZ
IMO 9360441
|
39,808 | 2007 |
7.6
|
B |
| 530 |
CHIP
IMO 9353101
|
37,293 | 2008 |
7.6
|
B |
| 531 |
BOW ENGINEER
IMO 9317860
|
30,086 | 2006 |
7.6
|
B |
| 532 |
STOLT NORLAND
IMO 9414060
|
43,593 | 2009 |
7.6
|
B |
| 533 |
KRITI CORAL
IMO 9417220
|
49,499 | 2006 |
7.6
|
B |
| 536 |
ARGOLIS
IMO 9326524
|
40,083 | 2007 |
7.7
|
B |
| 535 |
GALLOP
IMO 9799678
|
37,250 | 2019 |
7.7
|
B |
| 534 |
HUANG SHAN 16
IMO 9967940
|
19,885 | 2023 |
7.7
|
B |
| 537 |
HORIZON THETIS
IMO 9407380
|
50,266 | 2006 |
7.7
|
B |
| 538 |
SAKHARA LOTUS
IMO 9400382
|
32,107 | 2009 |
7.7
|
B |
| 539 |
CHEM HELEN
IMO 9340116
|
38,396 | 2007 |
7.7
|
B |
| 540 |
BOW FAITH
IMO 9114232
|
37,479 | 1997 |
7.7
|
B |
| 541 |
STOLT ISLAND
IMO 9414058
|
43,593 | 2009 |
7.7
|
B |
| 543 |
BRITISH ENGINEER
IMO 9724702
|
45,999 | 2017 |
7.7
|
C |
| 542 |
CHEMTRANS MOBILE
IMO 9732802
|
37,596 | 2016 |
7.7
|
C |
| 545 |
HAFNIA MALACCA
IMO 9725627
|
39,067 | 2015 |
7.7
|
C |
| 544 |
AMIF
IMO 9396373
|
40,429 | 2008 |
7.7
|
C |
| 549 |
BOCHEM ROTTERDAM
IMO 9955478
|
26,599 | 2021 |
7.8
|
C |
| 548 |
CHEM STELLAR
IMO 9731755
|
27,128 | 2014 |
7.8
|
C |
| 547 |
STI WEMBLEY
IMO 9691735
|
38,734 | 2014 |
7.8
|
C |
| 546 |
BOW FLORA
IMO 9143207
|
37,369 | 1998 |
7.8
|
C |
| 550 |
CHEMSTAR RIVER
IMO 9758026
|
22,407 | 2017 |
7.8
|
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.