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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.

Segment rank (2024)
#657 of 1,789 oil tankers
CO₂ intensity
3.5 g CO₂/dwt·nm
vs segment average (5.1)
-31% greener
B
Bulk Carrier Container Ship Oil Tanker Chemical Tanker Gas Carrier LNG Carrier General Cargo Vehicle Carrier Refrigerated Cargo Ro-Ro Cargo

CII band distribution

551 at D/E
A 411B 557C 556D 354E 197

2,075 rated vessels · 250 of the D/E set dock within 12 months

Docking pipeline — D/E vessels per quarter

51
Q4
64
'27 Q1
52
'27 Q2
27
'27 Q3
39
'27 Q4
54
'28 Q1
43
'28 Q2
30
'28 Q3

Windows estimated from the class-expiry docking model, not bookings.

Top eligible retrofit measures for this segment

MeasureEligible CO₂ reductionCapex band PaybackConfidence
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

392
D/E vessels with at least one eligible measure
€1,483–3,536M
capex range, top measure per vessel (392 of 392 with computable scaling)
0.25–0.46 Mt
annual CO₂ reduction available (vendor-claimed ranges × reported emissions)

Retrofit prospects — worst band first

VesselBand 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
See all 2,075 rated oil tankers with exposure and dock windows. Sign in →
Sort 🌱 Greenest first 🔧 Least efficient first — retrofit candidates
Size (DWT)
All sizes < 25,000 DWT 25k – 60k DWT 60k – 100k DWT 100k – 200k DWT > 200,000 DWT
Year
2025 2024
1,826
vessels ranked
1.36
greenest (g CO₂/dwt·nm)
4.12
segment median
# Vessel Size (DWT) Built Carbon intensity — AER (g CO₂/dwt·nm) Grade
652 SFL THELON
IMO 9593000
 159,500 2015
3.5
B
651 CAPTAIN JOHN
IMO 9692832
 113,876 2013
3.5
B
654 SFL TAURUS
IMO 9978339
 109,895 2024
3.5
B
656 DELTA BLUE
IMO 9601235
 158,322 2012
3.5
B
653 FRONT CASTOR
IMO 9780251
 111,088 2015
3.5
B
655 TP SPIRIT
IMO 9645413
 114,139 2016
3.5
B
659 NORDDOLPHIN
IMO 9779977
 113,955 2017
3.5
B
658 SEAODYSSEY
IMO 9740419
 113,176 2013
3.5
B
660 SPETSES LADY
IMO 9831074
 109,992 2020
3.5
B
657 MARLIN LE HAVRE
IMO 9829904
 109,997 2018
3.5
B
664 FRONT ALTAIR
IMO 9745902
 109,894 2014
3.5
B
662 BRIGHTWAY
IMO 9588146
 160,095 2012
3.5
B
661 NAVIG8 WOLF
IMO 9935301
 109,999 2023
3.5
B
663 MINERVA GEORGIA
IMO 9332157
 163,417 2008
3.5
B
667 YANNIS P.
IMO 9411343
 158,149 2010
3.5
B
672 LYRIC MAGNOLIA
IMO 9734408
 109,999 2016
3.5
B
666 LEO SUN
IMO 9457608
 114,531 2011
3.5
B
673 MIKELA P.
IMO 9440382
 158,007 2009
3.5
B
665 RONG LIN WAN
IMO 9783423
 109,783 2017
3.5
B
668 GREEN AURA
IMO 9808168
 112,684 2019
3.5
B
671 EAGLE LYON
IMO 9795115
 113,808 2017
3.5
B
670 TORM HERDIS
IMO 9797981
 115,109 2018
3.5
B
669 MARE SICULUM
IMO 9457892
 158,466 2011
3.5
B
674 WHITE MOON
IMO 9588158
 160,152 2012
3.5
B
676 LUNARIA
IMO 9901063
 111,076 2019
3.5
B
675 VIOLANDO
IMO 9429285
 164,764 2009
3.5
B
679 AITOLOS
IMO 9867619
 115,521 2020
3.5
B
678 BARBAROSA
IMO 9415399
 164,746 2009
3.5
B
677 MINERVA BALTICA
IMO 9728241
 113,172 2015
3.5
B
682 PROTEUS BOHEMIA
IMO 9923437
 109,999 2020
3.5
B
681 FRONT FUSION
IMO 9887803
 109,899 2021
3.5
B
680 FRONT FAVOUR
IMO 9903968
 109,893 2021
3.5
B
683 FRONT BRAGE
IMO 9418614
 156,557 2011
3.5
B
685 SELIGER
IMO 9402263
 115,126 2009
3.5
B
687 SPYROS K
IMO 9565948
 157,648 2009
3.5
B
686 GREEN ADMIRE
IMO 9927196
 114,377 2022
3.5
B
684 IONIC ARIADNE
IMO 9856555
 112,007 2020
3.5
B
688 YUAN TANG WAN
IMO 9846005
 113,684 2020
3.6
B
690 HAFNIA GALATEA
IMO 9796975
 109,990 2019
3.6
B
689 NAVIG8 PERSEVERANCE
IMO 9853266
 109,998 2015
3.6
B
693 SEAFAITH
IMO 9843209
 111,964 2020
3.6
B
695 NORDPENGUIN
IMO 9783007
 112,038 2018
3.6
B
694 NAVE COSMOS
IMO 9971707
 115,650 2022
3.6
B
692 AMAX AVENUE
IMO 9419450
 115,789 2010
3.6
B
691 ELIAS TSAKOS
IMO 9724075
 113,736 2016
3.6
B
699 PACIFIC CORAL
IMO 9893113
 113,306 2022
3.6
B
698 MINERVA ELEFTHERIA
IMO 9787168
 114,696 2015
3.6
B
697 ARDAS I
IMO 9930624
 115,335 2023
3.6
B
696 SOHO SQUARE
IMO 9505819
 114,900 2012
3.6
B
700 SEASPRITE
IMO 9711468
 113,998 2015
3.6
B
Page 14 of 36 — 1,789 vessels
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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.