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 |
|---|---|---|---|---|---|
| 1501 |
VISION
IMO 9295347
|
37,343 | 2006 |
7.2
|
E |
| 1502 |
STI CAMDEN
IMO 9688386
|
38,734 | 2014 |
7.2
|
E |
| 1503 |
CECH
IMO 9617442
|
42,150 | 2011 |
7.2
|
E |
| 1504 |
M BRIGIT
IMO 9340582
|
29,017 | 2006 |
7.3
|
E |
| 1505 |
KRITI STATE
IMO 9324289
|
76,565 | 2006 |
7.3
|
E |
| 1506 |
HISTRIA TIGER
IMO 9396335
|
40,420 | 2008 |
7.3
|
E |
| 1507 |
HAFNIA SUNDA
IMO 9725639
|
39,067 | 2015 |
7.3
|
E |
| 1508 |
ROSE M
IMO 9311000
|
45,838 | 2005 |
7.3
|
E |
| 1509 |
HISTRIA AGATA
IMO 9357559
|
40,440 | 2007 |
7.3
|
E |
| 1510 |
ASPHALT SPLENDOR
IMO 9763332
|
36,962 | 2015 |
7.3
|
E |
| 1511 |
ATLAS T
IMO 9441855
|
47,987 | 2010 |
7.3
|
E |
| 1512 |
SEACLIPPER
IMO 9570101
|
48,554 | 2013 |
7.3
|
E |
| 1513 |
COSMOGRAPH
IMO 9324459
|
47,326 | 2005 |
7.3
|
E |
| 1514 |
OCEAN VENTURE
IMO 9660657
|
49,995 | 2014 |
7.3
|
E |
| 1515 |
ASPHALT SYNERGY
IMO 9794159
|
36,771 | 2018 |
7.4
|
E |
| 1516 |
SEA ALTUS
IMO 9724570
|
39,999 | 2017 |
7.4
|
E |
| 1517 |
KANALA
IMO 9425552
|
49,997 | 2010 |
7.4
|
E |
| 1518 |
BITU ATLANTIC
IMO 9382085
|
45,986 | 2008 |
7.4
|
E |
| 1519 |
VELOS FORZA
IMO 9561370
|
48,008 | 2010 |
7.4
|
E |
| 1520 |
MAERSK ADRIATIC
IMO 9636632
|
37,538 | 2012 |
7.4
|
E |
| 1521 |
MAERSK BERING
IMO 9299422
|
29,057 | 2005 |
7.4
|
E |
| 1522 |
TIGER EYE
IMO 9746255
|
49,990 | 2013 |
7.4
|
E |
| 1523 |
TWINKLE STAR
IMO 9363780
|
45,750 | 2006 |
7.5
|
E |
| 1524 |
RITA M
IMO 9414278
|
45,997 | 2009 |
7.5
|
E |
| 1525 |
CLEAN NIRVANA
IMO 9308168
|
50,359 | 2008 |
7.5
|
E |
| 1526 |
HISTRIA PERLA
IMO 9301287
|
39,999 | 2005 |
7.6
|
E |
| 1527 |
STI HACKNEY
IMO 9686883
|
38,734 | 2014 |
7.6
|
E |
| 1528 |
MAERSK AEGEAN
IMO 9636644
|
37,538 | 2013 |
7.6
|
E |
| 1529 |
NAVE TITAN
IMO 9487469
|
49,996 | 2013 |
7.6
|
E |
| 1530 |
LANIKAI
IMO 9240897
|
46,342 | 2002 |
7.7
|
E |
| 1531 |
HISTRIA AZURE
IMO 9357561
|
40,394 | 2007 |
7.7
|
E |
| 1532 |
MYKLEBUST
IMO 9914632
|
29,649 | 2022 |
7.7
|
E |
| 1533 |
MINERVA JOANNA
IMO 9380386
|
46,924 | 2008 |
7.8
|
E |
| 1534 |
MARIANNA V.V.
IMO 9259707
|
84,999 | 2001 |
7.8
|
E |
| 1535 |
STI FULHAM
IMO 9688374
|
38,734 | 2014 |
7.8
|
E |
| 1536 |
MINERVA JOY
IMO 9363479
|
45,990 | 2008 |
7.8
|
E |
| 1537 |
HISTRIA CORAL
IMO 9301299
|
39,999 | 2006 |
7.8
|
E |
| 1538 |
KIRSTEN MAERSK
IMO 9431264
|
39,729 | 2010 |
7.8
|
E |
| 1539 |
HISTRIA GIADA
IMO 9396323
|
40,448 | 2007 |
7.8
|
E |
| 1540 |
PACCHA
IMO 9512185
|
50,091 | 2009 |
7.9
|
E |
| 1541 |
SIMOON
IMO 9274525
|
151,174 | 2004 |
7.9
|
E |
| 1542 |
MANILA I
IMO 9242326
|
46,839 | 2000 |
7.9
|
E |
| 1543 |
STONE I
IMO 9380582
|
37,889 | 2008 |
7.9
|
E |
| 1544 |
BOW HECTOR
IMO 9363493
|
33,694 | 2008 |
7.9
|
E |
| 1545 |
ETHERA
IMO 9387279
|
46,606 | 2008 |
7.9
|
E |
| 1546 |
OSCAR
IMO 9365386
|
49,995 | 2007 |
8.0
|
E |
| 1547 |
VS SPIRIT
IMO 9339636
|
34,671 | 2007 |
8.0
|
E |
| 1548 |
PIONEER
IMO 9260079
|
40,055 | 2001 |
8.0
|
E |
| 1549 |
BITU EXPRESS
IMO 9265689
|
49,282 | 2003 |
8.0
|
E |
| 1550 |
BRITISH CAPTAIN
IMO 9724685
|
45,999 | 2013 |
8.0
|
E |
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.