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 · 279 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 | 1,874 | 5–10% | €400k–1,200k | — | vendor claim |
| Bulbous bow reprofiling | 1,757 | 2–6% | €300k–900k | — | vendor claim |
| Turbocharger cut-out | 1,371 | 1–3% | €80k–250k | — | vendor claim |
| Methanol dual-fuel conversion | 1,195 | 5–15% | €8,000k–20,000k | — | vendor claim |
| Rotor sails (per unit) | 1,185 | route-dependent | €1,500k–3,500k | — | vendor claim |
| Suction wing sails (per unit) | 1,185 | route-dependent | €1,000k–2,500k | — | 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 |
|---|---|---|---|---|---|
| 400 |
FRONT SEOUL
IMO 9831854
|
157,270 | 2017 |
3.0
|
B |
| 404 |
DELTA MARINER
IMO 9579573
|
157,638 | 2013 |
3.0
|
B |
| 403 |
SEARUNNER
IMO 9765029
|
114,129 | 2017 |
3.0
|
B |
| 402 |
MARLIN SHIKOKU
IMO 9841627
|
156,573 | 2019 |
3.0
|
B |
| 407 |
ELANDRA SWIFT
IMO 9945306
|
109,999 | 2024 |
3.0
|
B |
| 406 |
MIAOULIS 21
IMO 9886641
|
158,081 | 2021 |
3.0
|
B |
| 408 |
FAIRWAY
IMO 9590319
|
160,250 | 2013 |
3.0
|
B |
| 405 |
ODESSA
IMO 9633458
|
162,090 | 2013 |
3.0
|
B |
| 409 |
PROTEUS INGRID
IMO 9923463
|
119,900 | 2020 |
3.0
|
B |
| 410 |
CAPTAIN LYRISTIS
IMO 9877183
|
158,081 | 2021 |
3.0
|
B |
| 411 |
SAQR
IMO 9956018
|
113,385 | 2024 |
3.0
|
B |
| 412 |
MONTESPERANZA
IMO 9585871
|
159,179 | 2012 |
3.0
|
B |
| 415 |
KAPODISTRIAS 21
IMO 9886639
|
158,081 | 2021 |
3.0
|
B |
| 414 |
EAGLE SAN JOSE
IMO 9795139
|
157,512 | 2018 |
3.0
|
B |
| 413 |
MONTE ULIA
IMO 9803285
|
156,424 | 2019 |
3.0
|
B |
| 416 |
SEAWAYS SAN SABA
IMO 9593426
|
159,018 | 2010 |
3.0
|
B |
| 417 |
ALMI SUN
IMO 9579535
|
157,787 | 2013 |
3.0
|
B |
| 420 |
CAPE BENAT
IMO 9406013
|
156,642 | 2010 |
3.0
|
B |
| 419 |
SEA SHELL
IMO 9773947
|
158,409 | 2016 |
3.0
|
B |
| 418 |
TRINITY
IMO 9730361
|
158,734 | 2016 |
3.0
|
B |
| 423 |
ESTEEM COWBOY
IMO 9952074
|
114,712 | 2021 |
3.0
|
B |
| 422 |
MATALA
IMO 9776743
|
158,714 | 2017 |
3.0
|
B |
| 421 |
AL FALAH
IMO 9828388
|
114,708 | 2021 |
3.0
|
B |
| 424 |
SEAENVOY
IMO 9740421
|
113,300 | 2013 |
3.0
|
B |
| 428 |
MINERVA CORALIA
IMO 9728239
|
113,850 | 2017 |
3.0
|
B |
| 427 |
IXORA
IMO 9940459
|
111,006 | 2022 |
3.0
|
B |
| 426 |
FRONT IDUN
IMO 9600944
|
157,000 | 2010 |
3.0
|
B |
| 425 |
MARE PICENUM
IMO 9449405
|
158,489 | 2011 |
3.0
|
B |
| 431 |
BARCELONA SPIRIT
IMO 9578634
|
158,482 | 2011 |
3.0
|
B |
| 433 |
TARIF
IMO 9828390
|
114,799 | 2021 |
3.0
|
B |
| 430 |
TENACITY VENTURE
IMO 9773052
|
114,439 | 2017 |
3.0
|
B |
| 434 |
GOLDWAY
IMO 9742900
|
154,781 | 2016 |
3.0
|
B |
| 429 |
EVRIDIKI
IMO 9318137
|
167,295 | 2007 |
3.0
|
B |
| 432 |
ALFA FINLANDIA
IMO 9823041
|
109,089 | 2019 |
3.0
|
B |
| 437 |
BURRI
IMO 9787948
|
115,018 | 2019 |
3.0
|
B |
| 436 |
PLATA EAST
IMO 9410997
|
297,007 | 2010 |
3.0
|
B |
| 435 |
DILONG SPIRIT
IMO 9390628
|
159,021 | 2009 |
3.0
|
B |
| 441 |
STAR ENERGY
IMO 9773935
|
158,409 | 2015 |
3.1
|
B |
| 440 |
PETALIDI
IMO 9529475
|
158,531 | 2012 |
3.1
|
B |
| 442 |
ORPHEAS
IMO 9318149
|
167,282 | 2007 |
3.1
|
B |
| 439 |
MINERVA DOXA
IMO 9304617
|
159,438 | 2003 |
3.1
|
B |
| 438 |
DILIGENT WARRIOR
IMO 9750050
|
149,995 | 2016 |
3.1
|
B |
| 444 |
NORDIC ZENITH
IMO 9588469
|
158,645 | 2011 |
3.1
|
B |
| 443 |
FAITHFUL WARRIOR
IMO 9750062
|
149,992 | 2016 |
3.1
|
B |
| 446 |
DECATHLON
IMO 9462926
|
158,475 | 2012 |
3.1
|
B |
| 445 |
AL AGAILA
IMO 9415404
|
164,787 | 2009 |
3.1
|
B |
| 447 |
SEAVIGOUR
IMO 9774185
|
158,566 | 2016 |
3.1
|
B |
| 450 |
AIGEORGIS
IMO 9891660
|
116,092 | 2021 |
3.1
|
B |
| 449 |
MINERVA ASTRA
IMO 9893008
|
115,484 | 2021 |
3.1
|
B |
| 448 |
ON PRECIOUS
IMO 9893216
|
114,623 | 2021 |
3.1
|
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.