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 |
|---|---|---|---|---|---|
| 951 |
HAFNIA NILE
IMO 9766217
|
74,189 | 2017 |
4.2
|
C |
| 952 |
ALPES
IMO 9817470
|
112,504 | 2018 |
4.2
|
C |
| 953 |
LYRIC CAMELLIA
IMO 9730933
|
109,999 | 2016 |
4.3
|
C |
| 954 |
BUALA
IMO 9433585
|
115,592 | 2010 |
4.3
|
C |
| 955 |
CL YINGDU
IMO 9718064
|
50,000 | 2013 |
4.3
|
C |
| 956 |
GHIBLI
IMO 9417799
|
112,961 | 2006 |
4.3
|
C |
| 957 |
CALYPSO
IMO 9899296
|
111,930 | 2021 |
4.3
|
C |
| 958 |
SEAJEWEL
IMO 9388807
|
108,889 | 2009 |
4.3
|
C |
| 959 |
ST. CLEMENS
IMO 9790361
|
49,998 | 2017 |
4.3
|
C |
| 960 |
STI GRATITUDE
IMO 9722182
|
109,999 | 2017 |
4.3
|
C |
| 961 |
MAERSK CAYMAN
IMO 9786164
|
49,919 | 2018 |
4.3
|
C |
| 962 |
MINERVA KYTHNOS
IMO 9592252
|
115,674 | 2010 |
4.3
|
C |
| 963 |
MONTEREY
IMO 9377779
|
105,009 | 2007 |
4.3
|
C |
| 964 |
AMFITRITI
IMO 9419369
|
115,404 | 2006 |
4.3
|
C |
| 965 |
ABHA
IMO 9400980
|
105,380 | 2008 |
4.3
|
C |
| 966 |
NORDLOTUS
IMO 9624067
|
105,543 | 2013 |
4.3
|
C |
| 967 |
GREEN AZURE
IMO 9934644
|
114,516 | 2023 |
4.3
|
C |
| 968 |
VST ELECTRA
IMO 9784611
|
109,986 | 2017 |
4.3
|
C |
| 969 |
NISSOS SERIFOS
IMO 9592264
|
115,688 | 2010 |
4.3
|
C |
| 970 |
SUNRISE
IMO 9761956
|
74,042 | 2014 |
4.3
|
C |
| 971 |
ALTERA THULE
IMO 9895264
|
147,098 | 2022 |
4.3
|
C |
| 972 |
CE-BERMUDA
IMO 9411226
|
158,143 | 2009 |
4.3
|
C |
| 973 |
SEA SENOR
IMO 9308950
|
104,999 | 2006 |
4.3
|
C |
| 974 |
RAYSUT
IMO 9402225
|
99,995 | 2009 |
4.3
|
C |
| 975 |
EAGLE HATTERAS
IMO 9453975
|
114,028 | 2010 |
4.3
|
C |
| 976 |
AQUALEGACY
IMO 9601833
|
115,763 | 2010 |
4.3
|
C |
| 977 |
ATHENS VOYAGER
IMO 9337391
|
105,614 | 2007 |
4.3
|
C |
| 978 |
HENRIQUE DIAS
IMO 9453834
|
157,055 | 2007 |
4.3
|
C |
| 979 |
T.KURUCESME
IMO 9692478
|
105,171 | 2013 |
4.3
|
C |
| 980 |
PACIFIC SAPPHIRE
IMO 9893058
|
113,306 | 2021 |
4.3
|
C |
| 981 |
SEA FALCON
IMO 9346859
|
110,295 | 2007 |
4.3
|
C |
| 982 |
HAFNIA ANDREA
IMO 9688415
|
50,040 | 2013 |
4.3
|
C |
| 983 |
ORANGE STARS
IMO 9433597
|
115,756 | 2011 |
4.3
|
C |
| 984 |
SAFEEN ELONA
IMO 9488011
|
105,258 | 2010 |
4.4
|
C |
| 985 |
GEM NO. 3
IMO 9774343
|
79,920 | 2014 |
4.4
|
C |
| 986 |
KMARIN RESPECT
IMO 9683001
|
109,584 | 2016 |
4.4
|
C |
| 987 |
SUNRAY
IMO 9761944
|
74,039 | 2014 |
4.4
|
C |
| 988 |
YASA GOLDEN BOSPHORUS
IMO 9334038
|
115,867 | 2007 |
4.4
|
C |
| 989 |
SEAWAYS LONSDALE
IMO 9697612
|
49,990 | 2014 |
4.4
|
C |
| 990 |
PHOENIX ADMIRAL
IMO 9482603
|
114,024 | 2007 |
4.4
|
C |
| 991 |
PENELOP
IMO 9325908
|
115,091 | 2006 |
4.4
|
C |
| 992 |
SEAPRINCESS
IMO 9373668
|
115,948 | 2005 |
4.4
|
C |
| 993 |
CLEAROCEAN APOLLON
IMO 9850707
|
113,252 | 2019 |
4.4
|
C |
| 994 |
KAMOME VICTORIA
IMO 9584102
|
74,908 | 2011 |
4.4
|
C |
| 995 |
AQUALEGEND
IMO 9592240
|
115,571 | 2010 |
4.4
|
C |
| 996 |
ADVANTAGE SUGAR
IMO 9410973
|
156,516 | 2011 |
4.4
|
C |
| 997 |
YASA AQUALINA
IMO 9469687
|
105,304 | 2011 |
4.4
|
C |
| 998 |
GRIMSTAD
IMO 9336402
|
105,850 | 2007 |
4.4
|
C |
| 999 |
SOUSTA
IMO 9384992
|
106,045 | 2007 |
4.4
|
C |
| 1000 |
ASP TREASURES
IMO 9732242
|
115,063 | 2016 |
4.4
|
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.