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 |
|---|---|---|---|---|---|
| 851 |
WHISTLER SPIRIT
IMO 9417323
|
109,011 | 2006 |
4.0
|
C |
| 852 |
EUROINTEGRITY
IMO 9410648
|
105,291 | 2009 |
4.0
|
C |
| 853 |
ADVANTAGE START
IMO 9466570
|
156,644 | 2011 |
4.0
|
C |
| 854 |
STI ELYSEES
IMO 9688829
|
109,999 | 2013 |
4.0
|
C |
| 855 |
JAG LOKESH
IMO 9390599
|
105,599 | 2009 |
4.0
|
C |
| 856 |
JATULI
IMO 9892444
|
112,459 | 2021 |
4.0
|
C |
| 857 |
TONY
IMO 9432036
|
162,342 | 2010 |
4.0
|
C |
| 858 |
STI MADISON
IMO 9688831
|
109,999 | 2013 |
4.0
|
C |
| 859 |
TORM GWENDOLYN
IMO 9428982
|
119,456 | 2010 |
4.0
|
C |
| 860 |
MARI BOYLE
IMO 9732979
|
49,999 | 2016 |
4.0
|
C |
| 861 |
CLIO
IMO 9396660
|
112,705 | 2008 |
4.0
|
C |
| 862 |
STI SOLIDARITY
IMO 9708576
|
109,999 | 2013 |
4.0
|
C |
| 863 |
YASA GOLDEN DARDANELLES
IMO 9339985
|
110,828 | 2008 |
4.0
|
C |
| 864 |
SEALOYALTY
IMO 9783928
|
108,610 | 2018 |
4.0
|
C |
| 865 |
STI BROADWAY
IMO 9690846
|
109,999 | 2014 |
4.0
|
C |
| 866 |
TORM GANGA
IMO 9461831
|
119,950 | 2010 |
4.0
|
C |
| 867 |
AMAZON VIRTUE
IMO 9660360
|
72,412 | 2012 |
4.0
|
C |
| 868 |
CAPRICORN SUN
IMO 9333785
|
115,577 | 2007 |
4.0
|
C |
| 869 |
TORM SOVEREIGN
IMO 9797723
|
49,999 | 2015 |
4.0
|
C |
| 870 |
LEONTIOS H
IMO 9724336
|
113,611 | 2016 |
4.0
|
C |
| 871 |
AGISTRI
IMO 9597018
|
158,464 | 2012 |
4.0
|
C |
| 872 |
SFL LION
IMO 9664770
|
115,162 | 2012 |
4.0
|
C |
| 873 |
BELMAR
IMO 9516959
|
115,903 | 2008 |
4.0
|
C |
| 874 |
CL FUGOU
IMO 9732931
|
50,000 | 2013 |
4.0
|
C |
| 875 |
BAHRA
IMO 9595008
|
110,761 | 2012 |
4.0
|
C |
| 876 |
DUBAI GREEN
IMO 9298674
|
74,999 | 2005 |
4.0
|
C |
| 877 |
ALMI EXPLORER
IMO 9579547
|
157,787 | 2013 |
4.0
|
C |
| 878 |
AL DASMA
IMO 9653446
|
109,719 | 2014 |
4.0
|
C |
| 879 |
ASPEN
IMO 9818058
|
112,459 | 2019 |
4.0
|
C |
| 880 |
STI VENETO
IMO 9690822
|
109,999 | 2013 |
4.0
|
C |
| 881 |
FPMC P HERO
IMO 9457610
|
114,380 | 2006 |
4.0
|
C |
| 882 |
JAG LEELA
IMO 9568184
|
105,525 | 2011 |
4.0
|
C |
| 883 |
STI WINNIE
IMO 9696709
|
109,999 | 2015 |
4.0
|
C |
| 884 |
STI GLADIATOR
IMO 9722170
|
109,999 | 2017 |
4.0
|
C |
| 885 |
ADVANTAGE PORTOFINO
IMO 9794836
|
75,343 | 2018 |
4.1
|
C |
| 886 |
HAIMA
IMO 9397896
|
104,991 | 2009 |
4.1
|
C |
| 887 |
SAMURAI
IMO 9378876
|
149,993 | 2009 |
4.1
|
C |
| 888 |
SFL PUMA
IMO 9664794
|
115,054 | 2012 |
4.1
|
C |
| 889 |
FPMC P IDEAL
IMO 9459709
|
109,994 | 2006 |
4.1
|
C |
| 890 |
SEAVELVET
IMO 9843211
|
111,964 | 2020 |
4.1
|
C |
| 891 |
ALFA BALTICA
IMO 9696773
|
106,373 | 2015 |
4.1
|
C |
| 892 |
ALQADISIA
IMO 9343352
|
115,577 | 2008 |
4.1
|
C |
| 893 |
JAG AABHA
IMO 9388948
|
74,841 | 2008 |
4.1
|
C |
| 894 |
STI STEADFAST
IMO 9719719
|
109,999 | 2013 |
4.1
|
C |
| 895 |
HAIGUI
IMO 9505821
|
114,900 | 2013 |
4.1
|
C |
| 896 |
OLYMPIC FLAG
IMO 9271341
|
155,009 | 2001 |
4.1
|
C |
| 897 |
ADVANTAGE SOLAR
IMO 9408683
|
156,644 | 2009 |
4.1
|
C |
| 898 |
SEAGUARDIAN
IMO 9891919
|
112,156 | 2021 |
4.1
|
C |
| 899 |
KYRAKATINGO
IMO 9779965
|
113,563 | 2017 |
4.1
|
C |
| 900 |
IONIC ASPIS
IMO 9523287
|
107,508 | 2011 |
4.1
|
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.