Oil 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
551 at D/E2,075 rated vessels · 250 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 | 1,790 | 5–10% | €400k–1,200k | — | vendor claim |
| Bulbous bow reprofiling | 1,674 | 2–6% | €300k–900k | — | vendor claim |
| Turbocharger cut-out | 1,267 | 1–3% | €80k–250k | — | vendor claim |
| Methanol dual-fuel conversion | 1,163 | 5–15% | €8,000k–20,000k | — | vendor claim |
| LNG dual-fuel conversion | 1,129 | 15–25% | €15,000k–35,000k | — | vendor claim |
| Rotor sails (per unit) | 1,052 | route-dependent | €1,500k–3,500k | — | 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 |
|---|---|---|---|
| PAULA GLORY · 25-60k | E | 3y | 2026 |
| OLYMPIC TROPHY · >200k | E | 16y | 2026 |
| SEALING · 25-60k | E | 23y | 2026 |
| EOS T · <25k | E | 20y | 2026 |
| HERCULES SUN · <25k | E | 4y | 2026 |
| # | Vessel | Size (DWT) | Built | Carbon intensity — AER (g CO₂/dwt·nm) | Grade |
|---|---|---|---|---|---|
| 1001 |
SOUSTA
IMO 9384992
|
106,045 | 2007 |
4.4
|
C |
| 1002 |
P. SOPHIA
IMO 9414034
|
105,071 | 2006 |
4.4
|
C |
| 1003 |
MINERVA SOPHIA
IMO 9382762
|
115,748 | 2009 |
4.4
|
C |
| 1004 |
BRIOLETTE
IMO 9524982
|
104,588 | 2011 |
4.4
|
C |
| 1005 |
HIGH MARINER
IMO 9812755
|
51,492 | 2017 |
4.4
|
C |
| 1006 |
OKEE JOHN T
IMO 9311036
|
53,712 | 2006 |
4.4
|
C |
| 1007 |
CLEAROCEAN GINKGO
IMO 9916604
|
50,000 | 2020 |
4.4
|
C |
| 1008 |
MYRTOS
IMO 9389100
|
106,969 | 2009 |
4.4
|
C |
| 1009 |
STI ROSE
IMO 9696682
|
109,999 | 2015 |
4.4
|
C |
| 1010 |
EAGLE KANGAR
IMO 9417024
|
107,481 | 2010 |
4.4
|
C |
| 1011 |
KMARIN REGARD
IMO 9683063
|
109,543 | 2016 |
4.4
|
C |
| 1012 |
CIELO DI HOUSTON
IMO 9791860
|
74,999 | 2019 |
4.4
|
C |
| 1013 |
ROWAN
IMO 9291262
|
114,834 | 2005 |
4.4
|
C |
| 1014 |
BANI YAS
IMO 9487249
|
74,913 | 2010 |
4.4
|
C |
| 1015 |
SEA STAR
IMO 9607710
|
112,147 | 2010 |
4.4
|
C |
| 1016 |
OCEAN PHOENIX
IMO 9388728
|
108,941 | 2007 |
4.5
|
C |
| 1017 |
NEW LIBERTY
IMO 9411082
|
164,028 | 2010 |
4.5
|
C |
| 1018 |
DUCHESS OF DORIA
IMO 9403346
|
53,603 | 2009 |
4.5
|
C |
| 1019 |
SEAOATH
IMO 9290361
|
105,472 | 2003 |
4.5
|
C |
| 1020 |
SOLOMON SEA
IMO 9760500
|
106,359 | 2016 |
4.5
|
C |
| 1021 |
ALTERA WAVE
IMO 9863558
|
103,158 | 2021 |
4.5
|
C |
| 1022 |
SAETTA
IMO 9384069
|
107,023 | 2009 |
4.5
|
C |
| 1023 |
KMARIN RESOURCE
IMO 9683037
|
109,483 | 2016 |
4.5
|
C |
| 1024 |
ADVANTAGE SPRING
IMO 9466582
|
156,596 | 2010 |
4.5
|
C |
| 1025 |
ARCHANGEL
IMO 9302592
|
163,216 | 2006 |
4.5
|
C |
| 1026 |
MINERVA KALLISTO
IMO 9853008
|
113,000 | 2016 |
4.5
|
C |
| 1027 |
MAERSK TOKYO
IMO 9718076
|
50,000 | 2013 |
4.5
|
C |
| 1028 |
AEGEAN NOBILITY
IMO 9345441
|
115,814 | 2007 |
4.5
|
C |
| 1029 |
TORM GWYNETH
IMO 9429003
|
119,456 | 2010 |
4.5
|
C |
| 1030 |
STI CONDOTTI
IMO 9690810
|
109,999 | 2013 |
4.5
|
C |
| 1031 |
MAERSK CORSICA
IMO 9786188
|
49,919 | 2019 |
4.5
|
C |
| 1032 |
HAFNIA LYNX
IMO 9635808
|
49,999 | 2013 |
4.5
|
C |
| 1033 |
MINERVA ALICE
IMO 9309435
|
114,850 | 2006 |
4.5
|
C |
| 1034 |
DAYTONA
IMO 9528043
|
115,896 | 2008 |
4.5
|
C |
| 1035 |
CONQUEST
IMO 9308089
|
73,917 | 2006 |
4.5
|
C |
| 1036 |
BUDDHA
IMO 9283306
|
109,637 | 2004 |
4.5
|
C |
| 1037 |
ANDEAN SUN
IMO 9911525
|
49,999 | 2022 |
4.5
|
C |
| 1038 |
CL XUNYANG
IMO 9718088
|
50,000 | 2013 |
4.5
|
C |
| 1039 |
COROSSOL
IMO 9395331
|
106,898 | 2006 |
4.6
|
C |
| 1040 |
HAFNIA EXPERIENCE
IMO 9735610
|
74,669 | 2016 |
4.6
|
C |
| 1041 |
ORIENT INNOVATION
IMO 9793387
|
49,997 | 2017 |
4.6
|
C |
| 1042 |
STI SLOANE
IMO 9690808
|
114,000 | 2013 |
4.6
|
C |
| 1043 |
HELLAS MARIANNA
IMO 9798076
|
49,850 | 2018 |
4.6
|
C |
| 1044 |
PGC COMPANION
IMO 9282625
|
72,825 | 2005 |
4.6
|
C |
| 1045 |
ALFA ALANDIA
IMO 9752797
|
106,324 | 2016 |
4.6
|
C |
| 1046 |
HELLAS AVATAR
IMO 9722613
|
49,997 | 2015 |
4.6
|
C |
| 1047 |
MAERSK CAPRI
IMO 9786140
|
49,919 | 2018 |
4.6
|
C |
| 1048 |
MINERVA NOUNOU
IMO 9309423
|
114,850 | 2006 |
4.6
|
C |
| 1049 |
BLUEBIRD
IMO 9737515
|
74,074 | 2016 |
4.6
|
C |
| 1050 |
DIYYINAH - I
IMO 9487251
|
74,954 | 2011 |
4.6
|
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.