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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.

Segment rank (2024)
#1,529 of 1,789 oil tankers
CO₂ intensity
7.6 g CO₂/dwt·nm
vs segment average (5.1)
+49% higher
E
1,826
vessels ranked
1.36
greenest (g CO₂/t·nm)
4.12
segment median
# Vessel Size (DWT) Built Carbon intensity — AER (g CO₂/dwt·nm) Grade
1501 ALPINE LINK
IMO 9478614
50,208 2010
7.2
E
1502 VISION
IMO 9295347
37,343 2006
7.2
E
1503 STI CAMDEN
IMO 9688386
38,734 2014
7.2
E
1504 CECH
IMO 9617442
42,150 2012
7.2
E
1505 M BRIGIT
IMO 9340582
29,017 2006
7.3
E
1506 KRITI STATE
IMO 9324289
76,565 2006
7.3
E
1507 HISTRIA TIGER
IMO 9396335
40,420 2008
7.3
E
1508 HAFNIA SUNDA
IMO 9725639
39,067 2015
7.3
E
1509 HISTRIA AGATA
IMO 9357559
40,440 2007
7.3
E
1510 SEACLIPPER
IMO 9570101
48,554 2013
7.3
E
1511 ASPHALT SPLENDOR
IMO 9763332
36,962 2015
7.3
E
1512 ATLAS T
IMO 9441855
47,987 2010
7.3
E
1513 ROSE M
IMO 9311000
45,838 2005
7.3
E
1514 COSMOGRAPH
IMO 9324459
47,326 2005
7.3
E
1515 OCEAN VENTURE
IMO 9660657
49,995 2014
7.3
E
1516 ASPHALT SYNERGY
IMO 9794159
36,771 2018
7.4
E
1517 SEA ALTUS
IMO 9724570
39,999 2017
7.4
E
1518 KANALA
IMO 9425552
49,997 2010
7.4
E
1519 MAERSK ADRIATIC
IMO 9636632
37,538 2012
7.4
E
1520 VELOS FORZA
IMO 9561370
48,008 2010
7.4
E
1521 MAERSK BERING
IMO 9299422
29,057 2005
7.4
E
1522 TIGER EYE
IMO 9746255
49,990 2016
7.4
E
1523 RITA M
IMO 9414278
45,997 2009
7.5
E
1524 TWINKLE STAR
IMO 9363780
45,750 2006
7.5
E
1525 HISTRIA PERLA
IMO 9301287
40,471 2005
7.5
E
1526 CLEAN NIRVANA
IMO 9308168
50,319 2008
7.5
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 HISTRIA CORAL
IMO 9301299
40,426 2006
7.7
E
1534 MINERVA JOANNA
IMO 9380386
46,924 2008
7.8
E
1535 MARIANNA V.V.
IMO 9259707
84,999 2002
7.8
E
1536 STI FULHAM
IMO 9688374
38,734 2014
7.8
E
1537 MINERVA JOY
IMO 9363479
45,990 2008
7.8
E
1538 HISTRIA GIADA
IMO 9396323
40,448 2007
7.8
E
1539 KIRSTEN MAERSK
IMO 9431264
39,729 2010
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 2003
7.9
E
1543 STONE I
IMO 9380582
37,889 2008
7.9
E
1544 BOW HECTOR
IMO 9363493
33,694 2009
7.9
E
1545 ETHERA
IMO 9387279
46,606 2008
7.9
E
1546 OSCAR
IMO 9365386
49,995 2007
8.0
E
1547 PIONEER
IMO 9260079
40,055 2003
8.0
E
1548 VS SPIRIT
IMO 9339636
34,671 2007
8.0
E
1549 BITU EXPRESS
IMO 9265689
49,282 2003
8.0
E
1550 BRITISH CAPTAIN
IMO 9724685
45,999 2017
8.0
E
Page 31 of 36 — 1,789 vessels
Engine intelligence

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.

Emission-friendly engine ranking

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.