Most Emission-Efficient Oil Tankers
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.
| # | Vessel | Size (DWT) | Built | Carbon intensity — AER (g CO₂/dwt·nm) | Grade |
|---|---|---|---|---|---|
| 1451 |
VENDOME STREET
IMO 9573672
|
47,879 | 2011 |
6.5
|
E |
| 1452 |
MINERVA EMILY
IMO 9380063
|
47,408 | 2009 |
6.5
|
E |
| 1453 |
EAGLE BERGEN
IMO 9676137
|
120,567 | 2015 |
6.5
|
E |
| 1454 |
ST. MARY
IMO 9439797
|
50,215 | 2009 |
6.5
|
E |
| 1455 |
CHAMPION TIMUR
IMO 9288837
|
47,210 | 2005 |
6.5
|
E |
| 1456 |
PVT VALENCIA
IMO 9367748
|
47,399 | 2008 |
6.6
|
E |
| 1457 |
NAVE EQUINOX
IMO 9351634
|
50,922 | 2007 |
6.6
|
E |
| 1458 |
ELEGANT VOYAGER
IMO 9547506
|
48,006 | 2009 |
6.6
|
E |
| 1459 |
TORM ALICE
IMO 9465966
|
49,999 | 2010 |
6.6
|
E |
| 1460 |
MINERVA IRIS
IMO 9285861
|
103,123 | 2004 |
6.6
|
E |
| 1461 |
MERSINI
IMO 9405899
|
51,753 | 2009 |
6.7
|
E |
| 1462 |
HISTRIA ATLAS
IMO 9800790
|
40,000 | 2019 |
6.7
|
E |
| 1463 |
HISTRIA PRINCE
IMO 9436666
|
40,410 | 2008 |
6.7
|
E |
| 1464 |
RADIANT SEA
IMO 9316244
|
73,933 | 2007 |
6.7
|
E |
| 1465 |
BITU ATLANTIC
IMO 9382085
|
50,805 | 2008 |
6.7
|
E |
| 1466 |
GRACE ROMAVICTOR
IMO 9629926
|
49,990 | 2012 |
6.7
|
E |
| 1467 |
KAIFAN
IMO 9656046
|
46,327 | 2014 |
6.7
|
E |
| 1468 |
NAVE BELLATRIX
IMO 9459084
|
49,999 | 2013 |
6.7
|
E |
| 1469 |
ETERNAL SUNSHINE
IMO 9273351
|
45,915 | 2004 |
6.7
|
E |
| 1470 |
CHAMPION POMER
IMO 9455739
|
52,579 | 2011 |
6.7
|
E |
| 1471 |
STAR C
IMO 9411135
|
37,836 | 2009 |
6.8
|
E |
| 1472 |
CHEMTRANS ADRIATIC
IMO 9298284
|
73,965 | 2005 |
6.8
|
E |
| 1473 |
CLEAN JUSTICE
IMO 9473717
|
45,998 | 2011 |
6.8
|
E |
| 1474 |
MINERVA XANTHE
IMO 9318010
|
50,921 | 2003 |
6.8
|
E |
| 1475 |
TORM GEMMA
IMO 9531636
|
119,456 | 2012 |
6.8
|
E |
| 1476 |
HAFNIA ATLANTIC
IMO 9810214
|
49,614 | 2017 |
6.8
|
E |
| 1477 |
TAURUS
IMO 9417206
|
49,997 | 2009 |
6.8
|
E |
| 1478 |
BALTIC NARVAL
IMO 9930222
|
24,323 | 2023 |
6.9
|
E |
| 1479 |
MAERSK CEBU
IMO 9786176
|
49,919 | 2019 |
6.9
|
E |
| 1480 |
OCEAN ELECTRA
IMO 9402782
|
47,377 | 2010 |
6.9
|
E |
| 1481 |
TORM AGNETE
IMO 9466013
|
49,999 | 2010 |
6.9
|
E |
| 1482 |
CHEM GUARD
IMO 9261762
|
34,551 | 2002 |
6.9
|
E |
| 1483 |
CHRYSANTHEMUM
IMO 9417452
|
105,187 | 2009 |
6.9
|
E |
| 1484 |
KALINKA
IMO 9367683
|
47,548 | 2008 |
6.9
|
E |
| 1485 |
CHARLINE
IMO 9476812
|
50,436 | 2009 |
6.9
|
E |
| 1486 |
WORLD HARMONY
IMO 9382970
|
74,200 | 2006 |
7.0
|
E |
| 1487 |
XANTHOS
IMO 9289178
|
61,369 | 2005 |
7.0
|
E |
| 1488 |
PIS PARAGON
IMO 9403310
|
45,920 | 2005 |
7.0
|
E |
| 1489 |
JASMINE S
IMO 9279721
|
45,937 | 2004 |
7.0
|
E |
| 1490 |
HAFNIA BOBCAT
IMO 9694476
|
49,999 | 2014 |
7.0
|
E |
| 1491 |
EM FORTUNE
IMO 9338802
|
47,371 | 2007 |
7.0
|
E |
| 1492 |
HISTRIA AMBRA
IMO 9607631
|
40,030 | 2013 |
7.0
|
E |
| 1493 |
ETC NEFERTARI
IMO 9399612
|
49,764 | 2011 |
7.1
|
E |
| 1494 |
STI PIMLICO
IMO 9686871
|
38,734 | 2014 |
7.1
|
E |
| 1495 |
HELLESPONT PROGRESS
IMO 9351426
|
73,727 | 2006 |
7.1
|
E |
| 1496 |
ST. ANDREW I
IMO 9308144
|
50,338 | 2007 |
7.1
|
E |
| 1497 |
YANGON
IMO 9250165
|
46,818 | 2003 |
7.1
|
E |
| 1498 |
ATLANTIC NARVAL
IMO 9930210
|
24,316 | 2023 |
7.1
|
E |
| 1499 |
FLORENCE
IMO 9333242
|
47,999 | 2006 |
7.1
|
E |
| 1500 |
SAPSAN
IMO 9311713
|
47,496 | 2005 |
7.2
|
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.