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 2025. 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 |
|---|---|---|---|---|---|
| 1101 |
MATILDA
IMO 9407457
|
112,935 | 2006 |
5.0
|
D |
| 1102 |
ALORA
IMO 9374856
|
73,604 | 2007 |
5.0
|
D |
| 1103 |
ECLIPSE I
IMO 9301536
|
158,933 | 2006 |
5.0
|
D |
| 1104 |
JESSIE GLORY
IMO 9952983
|
49,700 | 2024 |
5.0
|
D |
| 1105 |
ALATAU
IMO 9416551
|
115,896 | 2009 |
5.0
|
D |
| 1106 |
KALAHARI
IMO 9410882
|
112,827 | 2006 |
5.1
|
D |
| 1107 |
STI MYTHIC
IMO 9833553
|
47,499 | 2017 |
5.1
|
D |
| 1108 |
MERONAS
IMO 9934905
|
49,990 | 2022 |
5.1
|
D |
| 1109 |
IRINI
IMO 9934890
|
49,990 | 2022 |
5.1
|
D |
| 1110 |
STAVANGER PRIDE
IMO 9856062
|
49,999 | 2020 |
5.1
|
D |
| 1111 |
PS AMALFI
IMO 9439395
|
99,987 | 2010 |
5.1
|
D |
| 1112 |
NAVIG8 MESSI
IMO 9482859
|
75,618 | 2011 |
5.1
|
D |
| 1113 |
SEA EAGLE
IMO 9849045
|
49,916 | 2019 |
5.1
|
D |
| 1114 |
EMERALD EXPRESS
IMO 9425564
|
50,110 | 2006 |
5.1
|
D |
| 1115 |
HAFNIA JAGUAR
IMO 9635858
|
49,999 | 2014 |
5.1
|
D |
| 1116 |
PUFFIN PACIFIC
IMO 9876402
|
49,903 | 2018 |
5.1
|
D |
| 1117 |
NOSTOS
IMO 9258014
|
47,147 | 2003 |
5.1
|
D |
| 1118 |
CEDAR EXPRESS
IMO 9447770
|
51,495 | 2013 |
5.1
|
D |
| 1119 |
HAFNIA EXCEL
IMO 9735579
|
74,547 | 2015 |
5.1
|
D |
| 1120 |
VS PROGRESS
IMO 9351426
|
73,727 | 2003 |
5.1
|
D |
| 1121 |
HAFNIA PROVIDENCE
IMO 9737759
|
74,997 | 2016 |
5.1
|
D |
| 1122 |
S FONTVIEILLE
IMO 9645786
|
49,990 | 2013 |
5.1
|
D |
| 1123 |
EAGLE HAMILTON
IMO 9426207
|
114,022 | 2010 |
5.1
|
D |
| 1124 |
MARINA M
IMO 9952610
|
49,842 | 2021 |
5.1
|
D |
| 1125 |
GISELE
IMO 9321196
|
74,998 | 2007 |
5.2
|
D |
| 1126 |
P. ALIKI
IMO 9460136
|
105,304 | 2010 |
5.2
|
D |
| 1127 |
NAVIG8 HONOR
IMO 9556181
|
75,000 | 2006 |
5.2
|
D |
| 1128 |
HAFNIA PANTHER
IMO 9694464
|
49,999 | 2014 |
5.2
|
D |
| 1129 |
MAERSK TEESPORT
IMO 9726463
|
49,990 | 2016 |
5.2
|
D |
| 1130 |
LEO SUN
IMO 9457608
|
114,531 | 2011 |
5.2
|
D |
| 1131 |
CASTRO ALVES
IMO 9547673
|
115,728 | 2008 |
5.2
|
D |
| 1132 |
ADVANTAGE PADOVA
IMO 9794848
|
75,111 | 2019 |
5.2
|
D |
| 1133 |
SEA COUGAR
IMO 9834868
|
49,910 | 2019 |
5.2
|
D |
| 1134 |
SANDPIPER PACIFIC
IMO 9648192
|
51,833 | 2013 |
5.2
|
D |
| 1135 |
WONDER ALTAIR
IMO 9884825
|
50,302 | 2015 |
5.2
|
D |
| 1136 |
ST. MARY
IMO 9439797
|
50,215 | 2009 |
5.2
|
D |
| 1137 |
EAGLE BLANE
IMO 9833101
|
128,427 | 2020 |
5.2
|
D |
| 1138 |
CMC ANCUD
IMO 9681106
|
49,990 | 2014 |
5.2
|
D |
| 1139 |
MINERVA EMILY
IMO 9380063
|
47,408 | 2009 |
5.2
|
D |
| 1140 |
KRITI STATE
IMO 9324289
|
76,565 | 2006 |
5.2
|
D |
| 1141 |
MONTE ROSA
IMO 9301952
|
74,932 | 2003 |
5.2
|
D |
| 1142 |
STI DUCHESSA
IMO 9669938
|
49,990 | 2012 |
5.3
|
D |
| 1143 |
ULYSSES I
IMO 9426283
|
53,520 | 2010 |
5.3
|
D |
| 1144 |
STI DAMA
IMO 9686716
|
49,990 | 2014 |
5.3
|
D |
| 1145 |
VALPIAVE
IMO 9453030
|
115,909 | 2010 |
5.3
|
D |
| 1146 |
ADVANTAGE ATOM
IMO 9472622
|
116,014 | 2011 |
5.3
|
D |
| 1147 |
HAFNIA OSPREY
IMO 9682241
|
49,999 | 2015 |
5.3
|
D |
| 1148 |
SEAWAYS MYSTERY
IMO 9392808
|
49,999 | 2006 |
5.3
|
D |
| 1149 |
VS PROSPERA
IMO 9298313
|
73,869 | 2005 |
5.3
|
D |
| 1150 |
SEAWAYS LONSDALE
IMO 9697612
|
49,990 | 2014 |
5.3
|
D |
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 2025 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.