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 |
|---|---|---|---|---|---|
| 50 |
TWIN CASTOR
IMO 9625956
|
321,039 | 2013 |
1.9
|
A |
| 52 |
NEW MELODY
IMO 9799185
|
307,431 | 2019 |
1.9
|
A |
| 54 |
NEW JOURNEY
IMO 9799197
|
307,569 | 2019 |
1.9
|
A |
| 53 |
EAGLE VALENCE
IMO 9910234
|
289,999 | 2022 |
1.9
|
A |
| 55 |
GRAND AMBITION
IMO 9909807
|
299,988 | 2021 |
1.9
|
A |
| 56 |
HALCYON
IMO 9885594
|
299,942 | 2020 |
1.9
|
A |
| 57 |
GRAND BONANZA
IMO 9915569
|
299,988 | 2021 |
1.9
|
A |
| 58 |
FRONT OSEN
IMO 9728708
|
298,991 | 2016 |
1.9
|
A |
| 59 |
XIN WEI YANG
IMO 9761475
|
308,313 | 2017 |
1.9
|
A |
| 61 |
SOPHIA
IMO 9776559
|
319,398 | 2017 |
1.9
|
A |
| 60 |
NEW RENOWN
IMO 9759604
|
318,926 | 2017 |
1.9
|
A |
| 63 |
UNIVERSAL PARTNER
IMO 9837614
|
299,981 | 2019 |
1.9
|
A |
| 62 |
FRONT TYNE
IMO 9933676
|
299,985 | 2023 |
1.9
|
A |
| 64 |
DHT OSPREY
IMO 9734111
|
299,999 | 2016 |
1.9
|
A |
| 66 |
NEW MERIT
IMO 9706396
|
318,348 | 2017 |
1.9
|
A |
| 65 |
MARAN MIRA
IMO 9870800
|
299,995 | 2020 |
1.9
|
A |
| 67 |
C. GENUINE
IMO 9929663
|
300,419 | 2022 |
1.9
|
A |
| 69 |
MARAN ARES
IMO 9796872
|
319,398 | 2017 |
1.9
|
A |
| 68 |
KHK EMPRESS
IMO 9830965
|
314,014 | 2017 |
1.9
|
A |
| 71 |
NAVIGARE TERRA MATER
IMO 9740330
|
297,638 | 2017 |
1.9
|
A |
| 70 |
EAGLE VALLERY
IMO 9910246
|
299,473 | 2022 |
1.9
|
A |
| 72 |
SEAWAYS LIBERTY
IMO 9727027
|
300,973 | 2016 |
1.9
|
A |
| 74 |
LITA
IMO 9819870
|
302,520 | 2015 |
1.9
|
A |
| 73 |
COSLUCKY LAKE
IMO 9791236
|
310,574 | 2017 |
1.9
|
A |
| 76 |
NEW COROLLA
IMO 9900679
|
307,552 | 2021 |
2.0
|
A |
| 75 |
HILLAH
IMO 9890977
|
313,166 | 2018 |
2.0
|
A |
| 80 |
MORNING HOPE
IMO 9789283
|
300,927 | 2015 |
2.0
|
A |
| 82 |
MARAN ANTIOPE
IMO 9901348
|
318,482 | 2021 |
2.0
|
A |
| 81 |
DIAS I
IMO 9858474
|
299,999 | 2020 |
2.0
|
A |
| 79 |
NEW VANGUARD
IMO 9445631
|
297,115 | 2011 |
2.0
|
A |
| 78 |
ATLANTAS
IMO 9389899
|
321,300 | 2010 |
2.0
|
A |
| 77 |
NISSOS DESPOTIKO
IMO 9845697
|
318,744 | 2019 |
2.0
|
A |
| 84 |
COSFLOURISH LAKE
IMO 9783356
|
308,152 | 2017 |
2.0
|
A |
| 83 |
KIRKUK
IMO 9829655
|
320,596 | 2019 |
2.0
|
A |
| 86 |
DHT SUNDARBANS
IMO 9590876
|
318,123 | 2012 |
2.0
|
A |
| 85 |
GEORGIOS
IMO 9389033
|
299,999 | 2009 |
2.0
|
A |
| 87 |
ALMI ATLAS
IMO 9816323
|
315,221 | 2018 |
2.0
|
A |
| 88 |
AMAD
IMO 9783693
|
298,705 | 2018 |
2.0
|
A |
| 90 |
NEW PROSPERITY
IMO 9689988
|
318,329 | 2015 |
2.0
|
A |
| 89 |
APHRODITE
IMO 9874210
|
302,109 | 2017 |
2.0
|
A |
| 92 |
NISSOS KEROS
IMO 9856074
|
318,953 | 2017 |
2.0
|
A |
| 91 |
KHK MAJESTY
IMO 9830977
|
314,014 | 2017 |
2.0
|
A |
| 93 |
BAGHDAD
IMO 9876414
|
313,433 | 2020 |
2.0
|
A |
| 95 |
XIN MAO YANG
IMO 9771755
|
307,573 | 2018 |
2.0
|
A |
| 94 |
NEW TRIUMPH
IMO 9689990
|
318,239 | 2015 |
2.0
|
A |
| 97 |
SEAPASSION
IMO 9783734
|
299,271 | 2017 |
2.0
|
A |
| 96 |
ALMI HYDRA
IMO 9583720
|
319,357 | 2013 |
2.0
|
A |
| 98 |
FRONT FORTH
IMO 9739501
|
299,392 | 2016 |
2.0
|
A |
| 100 |
NISSOS KEA
IMO 9920758
|
300,323 | 2022 |
2.0
|
A |
| 99 |
NISSOS NIKOURIA
IMO 9920760
|
300,323 | 2022 |
2.0
|
A |
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.