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 |
|---|---|---|---|---|---|
| 1201 |
CELSIUS PHILADELPHIA
IMO 9884825
|
50,302 | 2015 |
5.2
|
D |
| 1202 |
ASAHI PRINCESS
IMO 9411197
|
105,372 | 2009 |
5.2
|
D |
| 1203 |
KRITI SAMARIA
IMO 9329409
|
105,865 | 2007 |
5.2
|
D |
| 1204 |
KRITI VIGOR
IMO 9290397
|
159,156 | 2004 |
5.2
|
D |
| 1205 |
HAFNIA CATERINA
IMO 9688427
|
49,999 | 2013 |
5.2
|
D |
| 1206 |
ENERGY AFRODITE
IMO 9942304
|
49,812 | 2022 |
5.2
|
D |
| 1207 |
CAPOEIRA
IMO 9327011
|
73,400 | 2004 |
5.3
|
D |
| 1208 |
ALDER EXPRESS
IMO 9934163
|
49,832 | 2020 |
5.3
|
D |
| 1209 |
PELICAN MARINER
IMO 9905423
|
50,177 | 2021 |
5.3
|
D |
| 1210 |
AL SOOR II
IMO 9329784
|
69,836 | 2007 |
5.3
|
D |
| 1211 |
GRACE FERRUM
IMO 9667928
|
49,995 | 2013 |
5.3
|
D |
| 1212 |
MINDORO
IMO 9389095
|
106,741 | 2009 |
5.3
|
D |
| 1213 |
JAG PRIYANKA
IMO 9658379
|
49,990 | 2013 |
5.3
|
D |
| 1214 |
CLEAROCEAN MUSTANG
IMO 9893761
|
49,999 | 2019 |
5.3
|
D |
| 1215 |
CHRYSTAL SKY
IMO 9334569
|
73,956 | 2004 |
5.3
|
D |
| 1216 |
HELLAS CALAFIA
IMO 9798088
|
49,810 | 2018 |
5.3
|
D |
| 1217 |
ISE PRINCESS
IMO 9411185
|
105,361 | 2009 |
5.3
|
D |
| 1218 |
TORM NEW ZEALAND
IMO 9443152
|
49,999 | 2011 |
5.3
|
D |
| 1219 |
GIANNIS
IMO 9432050
|
149,999 | 2011 |
5.3
|
D |
| 1220 |
AURORA SPIRIT
IMO 9837169
|
129,632 | 2020 |
5.3
|
D |
| 1221 |
TURQUOISE
IMO 9717761
|
49,990 | 2015 |
5.3
|
D |
| 1222 |
HELLAS MARGARITA
IMO 9794721
|
49,879 | 2017 |
5.3
|
D |
| 1223 |
SOLAR CLAIRE
IMO 9882425
|
49,990 | 2020 |
5.3
|
D |
| 1224 |
CHAMPION CONCEPT
IMO 9272204
|
47,171 | 2005 |
5.3
|
D |
| 1225 |
STI MAGNETIC
IMO 9829485
|
47,499 | 2017 |
5.3
|
D |
| 1226 |
SEAVOYAGER
IMO 9408762
|
109,085 | 2006 |
5.3
|
D |
| 1227 |
VICTORIA GLORY
IMO 9952969
|
49,700 | 2023 |
5.3
|
D |
| 1228 |
LIGURIAN SEA
IMO 9577032
|
116,715 | 2011 |
5.3
|
D |
| 1229 |
SEA TIGER I
IMO 9358955
|
49,999 | 2007 |
5.3
|
D |
| 1230 |
ALBERTA
IMO 9486922
|
104,760 | 2010 |
5.3
|
D |
| 1231 |
PRATINCOLE PACIFIC
IMO 9887621
|
49,941 | 2019 |
5.3
|
D |
| 1232 |
ESTEEM DISCOVERY
IMO 9882358
|
49,999 | 2018 |
5.3
|
D |
| 1233 |
NORD VALKYRIE
IMO 9893773
|
49,999 | 2019 |
5.3
|
D |
| 1234 |
TORM LOTTE
IMO 9392468
|
52,996 | 2009 |
5.3
|
D |
| 1235 |
SPRING STREET
IMO 9539585
|
50,007 | 2013 |
5.3
|
D |
| 1236 |
CL GEORGE ELIOT
IMO 9943360
|
49,355 | 2023 |
5.3
|
D |
| 1237 |
VALLESINA
IMO 9417311
|
109,089 | 2009 |
5.3
|
D |
| 1238 |
TORM SUBLIME
IMO 9854789
|
49,974 | 2019 |
5.3
|
D |
| 1239 |
ATHINA
IMO 9884253
|
49,999 | 2020 |
5.4
|
D |
| 1240 |
CABO SAN VICENTE
IMO 9346433
|
63,605 | 2008 |
5.4
|
D |
| 1241 |
SAMOS
IMO 9486934
|
104,649 | 2010 |
5.4
|
D |
| 1242 |
BW EGRET
IMO 9607174
|
49,999 | 2014 |
5.4
|
D |
| 1243 |
PLOUTOS
IMO 9327023
|
73,711 | 2006 |
5.4
|
D |
| 1244 |
TIDE SPIRIT
IMO 9843912
|
129,632 | 2020 |
5.4
|
D |
| 1245 |
FREE SPIRIT
IMO 9409259
|
113,091 | 2008 |
5.4
|
D |
| 1246 |
HAFNIA PACIFIC
IMO 9810226
|
49,686 | 2017 |
5.4
|
D |
| 1247 |
CHRYSALIS
IMO 9437684
|
115,867 | 2010 |
5.4
|
D |
| 1248 |
MERONAS
IMO 9934905
|
49,990 | 2022 |
5.4
|
D |
| 1249 |
STI BOSPHORUS
IMO 9785691
|
49,990 | 2017 |
5.4
|
D |
| 1250 |
SEAWAYS JEJU
IMO 9700471
|
50,072 | 2013 |
5.4
|
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 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.