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 |
|---|---|---|---|---|---|
| 451 |
HAFNIA ARONALDO
IMO 9711561
|
38,506 | 2015 |
7.1
|
B |
| 452 |
BOW FAGUS
IMO 9047764
|
37,375 | 1995 |
7.1
|
B |
| 453 |
OPERA
IMO 9804887
|
37,245 | 2020 |
7.1
|
B |
| 454 |
ECO REVOLUTION
IMO 9725598
|
39,208 | 2016 |
7.2
|
B |
| 456 |
VERIGE
IMO 9401128
|
52,725 | 2010 |
7.2
|
B |
| 455 |
DEE4 JUNIPER
IMO 9930923
|
49,999 | 2020 |
7.2
|
B |
| 457 |
ANDREA VICTORY
IMO 9288849
|
47,210 | 2005 |
7.2
|
B |
| 458 |
NCC SAMA
IMO 9480150
|
45,471 | 2012 |
7.2
|
B |
| 460 |
BOW STAR
IMO 9197296
|
49,487 | 2004 |
7.2
|
B |
| 459 |
APIASTOS
IMO 9365374
|
49,997 | 2007 |
7.2
|
B |
| 461 |
STOLT GLORY
IMO 9311012
|
33,929 | 2005 |
7.2
|
B |
| 462 |
HAFNIA MAGELLAN
IMO 9725615
|
39,067 | 2015 |
7.2
|
B |
| 463 |
SUPERBA
IMO 9538165
|
37,949 | 2014 |
7.2
|
B |
| 464 |
STORE BAY
IMO 9733698
|
30,711 | 2015 |
7.2
|
B |
| 466 |
CARTAGENA
IMO 9389318
|
46,923 | 2009 |
7.2
|
B |
| 465 |
BOCHEM GHENT
IMO 9565649
|
33,628 | 2006 |
7.2
|
B |
| 467 |
STOLT SYPRESS
IMO 9150315
|
36,677 | 1998 |
7.2
|
B |
| 470 |
FAITHFUL STAR
IMO 9228320
|
34,465 | 2000 |
7.2
|
B |
| 469 |
HAFNIA ALMANDINE
IMO 9714068
|
38,506 | 2015 |
7.2
|
B |
| 468 |
ANTARES
IMO 9800817
|
40,356 | 2022 |
7.2
|
B |
| 473 |
UOG DESPINA V
IMO 9425318
|
49,999 | 2010 |
7.3
|
B |
| 472 |
HAFNIA VALENTINO
IMO 9692246
|
49,126 | 2015 |
7.3
|
B |
| 471 |
STOLT BRELAND
IMO 9414084
|
43,475 | 2010 |
7.3
|
B |
| 474 |
BOW SIRIUS
IMO 9215294
|
49,539 | 2006 |
7.3
|
B |
| 477 |
BOCHEM HOUSTON
IMO 9955428
|
26,611 | 2021 |
7.3
|
B |
| 476 |
BOW AQUARIUS
IMO 9753791
|
40,900 | 2016 |
7.3
|
B |
| 475 |
THEANOULA
IMO 9935557
|
39,855 | 2022 |
7.3
|
B |
| 478 |
HAFNIA AZOTIC
IMO 9719757
|
38,506 | 2015 |
7.3
|
B |
| 479 |
REGUETON
IMO 9411989
|
37,872 | 2009 |
7.3
|
B |
| 480 |
SEA CUMULUS
IMO 9724532
|
39,999 | 2016 |
7.3
|
B |
| 482 |
HAFNIA AMETRINE
IMO 9714513
|
38,506 | 2015 |
7.3
|
B |
| 481 |
HW OTTO
IMO 9394040
|
40,435 | 2007 |
7.3
|
B |
| 483 |
LUCKY SAILOR
IMO 9464352
|
37,596 | 2009 |
7.3
|
B |
| 485 |
MEDALTA ADVENTURER
IMO 9761451
|
30,727 | 2015 |
7.3
|
B |
| 484 |
BOW CAPRICORN
IMO 9752010
|
40,929 | 2016 |
7.3
|
B |
| 486 |
BOW CECIL
IMO 9143219
|
37,369 | 1998 |
7.3
|
B |
| 488 |
MILANO
IMO 9286059
|
37,305 | 2005 |
7.3
|
B |
| 487 |
WISDOM STAR
IMO 9278674
|
34,528 | 2003 |
7.3
|
B |
| 489 |
MANDAL
IMO 9732773
|
37,596 | 2016 |
7.3
|
B |
| 491 |
STENA IMAGE
IMO 9667473
|
49,719 | 2015 |
7.3
|
B |
| 490 |
VELOS AQUARIUS
IMO 9381756
|
49,999 | 2008 |
7.3
|
B |
| 492 |
THE JUDGE
IMO 9755725
|
37,770 | 2016 |
7.4
|
B |
| 494 |
BOW GEMINI
IMO 9752034
|
40,895 | 2017 |
7.4
|
B |
| 493 |
STOLT BELUGA
IMO 9613965
|
33,552 | 2013 |
7.4
|
B |
| 497 |
NCC HUDA
IMO 9399272
|
45,459 | 2011 |
7.4
|
B |
| 496 |
HORIZON ATHENA
IMO 9407378
|
44,999 | 2008 |
7.4
|
B |
| 495 |
BOW FIRDA
IMO 9250751
|
37,427 | 2003 |
7.4
|
B |
| 500 |
BRISTOL TRADER
IMO 9737101
|
35,863 | 2016 |
7.4
|
B |
| 499 |
ZEZE START
IMO 9392781
|
49,999 | 2005 |
7.4
|
B |
| 498 |
GULF HUWAYLAT
IMO 9359870
|
45,967 | 2008 |
7.4
|
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 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.