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 · 286 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 | 1,283 | 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) | 1,064 | 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 |
|---|---|---|---|---|---|
| 802 |
ELANDRA BAY
IMO 9821691
|
115,674 | 2018 |
3.8
|
C |
| 801 |
OLIB
IMO 9334739
|
108,433 | 2009 |
3.8
|
C |
| 803 |
NOVO
IMO 9633446
|
162,029 | 2010 |
3.8
|
C |
| 804 |
ZOUZOU N.
IMO 9410222
|
162,204 | 2010 |
3.9
|
C |
| 805 |
STI SPIGA
IMO 9708148
|
109,999 | 2015 |
3.9
|
C |
| 806 |
GALWAY SPIRIT
IMO 9312858
|
105,559 | 2007 |
3.9
|
C |
| 808 |
SANMAR SONATINA
IMO 9409479
|
74,997 | 2008 |
3.9
|
C |
| 807 |
NEW ABILITY
IMO 9361512
|
105,381 | 2008 |
3.9
|
C |
| 812 |
PROTEUS TRACY
IMO 9923449
|
109,999 | 2023 |
3.9
|
C |
| 811 |
ARISTARCHOS
IMO 9788394
|
79,905 | 2015 |
3.9
|
C |
| 810 |
ALICANTE
IMO 9527855
|
115,707 | 2008 |
3.9
|
C |
| 809 |
FRONT OCELOT
IMO 9726580
|
109,900 | 2016 |
3.9
|
C |
| 813 |
AGIOS GERASIMOS
IMO 9693056
|
109,999 | 2013 |
3.9
|
C |
| 814 |
EPICURUS
IMO 9737096
|
79,945 | 2017 |
3.9
|
C |
| 816 |
MINERVA OLYMPIA
IMO 9787194
|
114,780 | 2015 |
3.9
|
C |
| 815 |
HAFNIA KALLANG
IMO 9766190
|
74,189 | 2017 |
3.9
|
C |
| 819 |
BAKER SPIRIT
IMO 9408073
|
156,928 | 2009 |
3.9
|
C |
| 818 |
SEBAROK SPIRIT
IMO 9572264
|
109,554 | 2008 |
3.9
|
C |
| 817 |
ALEXANDER
IMO 9826720
|
113,170 | 2017 |
3.9
|
C |
| 820 |
GUANYIN
IMO 9299707
|
109,857 | 2005 |
3.9
|
C |
| 821 |
ABU DHABI-III
IMO 9489027
|
105,131 | 2011 |
3.9
|
C |
| 822 |
MINERVA GLORIA
IMO 9382750
|
115,873 | 2009 |
3.9
|
C |
| 824 |
JAG LARA
IMO 9488023
|
105,258 | 2012 |
3.9
|
C |
| 823 |
MINERVA ARIES
IMO 9412177
|
105,483 | 2006 |
3.9
|
C |
| 826 |
ALMI VOYAGER
IMO 9579585
|
157,638 | 2014 |
3.9
|
C |
| 825 |
DUBAI CHARM
IMO 9402495
|
115,514 | 2006 |
3.9
|
C |
| 829 |
PRIMERO
IMO 9741815
|
106,329 | 2016 |
3.9
|
C |
| 833 |
NEMO
IMO 9313498
|
105,804 | 2008 |
3.9
|
C |
| 828 |
SINBAD
IMO 9413688
|
115,928 | 2009 |
3.9
|
C |
| 827 |
HAI SHANG
IMO 9792852
|
109,900 | 2018 |
3.9
|
C |
| 832 |
JOSE DO PATROCINIO
IMO 9453860
|
157,055 | 2007 |
3.9
|
C |
| 831 |
MARETA
IMO 9537927
|
115,795 | 2008 |
3.9
|
C |
| 830 |
LISBOA
IMO 9765158
|
155,723 | 2017 |
3.9
|
C |
| 834 |
SUEZ ENCHANTED
IMO 9318084
|
159,233 | 2007 |
3.9
|
C |
| 835 |
STI LOMBARD
IMO 9708150
|
109,999 | 2015 |
3.9
|
C |
| 838 |
SEALEO
IMO 9473066
|
107,505 | 2012 |
3.9
|
C |
| 837 |
NEAPOLIS
IMO 9792199
|
73,937 | 2018 |
3.9
|
C |
| 836 |
LANCING
IMO 9792046
|
104,074 | 2018 |
3.9
|
C |
| 848 |
DOLPHIN PEARL
IMO 9402237
|
114,824 | 2006 |
4.0
|
C |
| 843 |
NISSOS PAROS
IMO 9592290
|
115,722 | 2010 |
4.0
|
C |
| 842 |
SFL TIGER
IMO 9664809
|
121,225 | 2012 |
4.0
|
C |
| 847 |
ADAM
IMO 9826732
|
113,226 | 2018 |
4.0
|
C |
| 846 |
NAVIG8 PRESTIGE JKB
IMO 9831309
|
111,000 | 2015 |
4.0
|
C |
| 845 |
DUBAI ATTRACTION
IMO 9422536
|
115,459 | 2011 |
4.0
|
C |
| 844 |
ALFRED
IMO 9826897
|
113,159 | 2018 |
4.0
|
C |
| 841 |
CALIDA
IMO 9522128
|
115,812 | 2008 |
4.0
|
C |
| 840 |
PACIFIC RAWAN
IMO 9772022
|
109,999 | 2017 |
4.0
|
C |
| 839 |
NORTH SEA
IMO 9760495
|
106,340 | 2016 |
4.0
|
C |
| 850 |
IONIC ANASSA
IMO 9779795
|
114,718 | 2014 |
4.0
|
C |
| 849 |
NAMRATA
IMO 9401154
|
105,830 | 2008 |
4.0
|
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.