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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)
#673 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

552 at D/E
A 412B 557C 554D 355E 197

2,075 rated vessels · 266 of the D/E set dock within 12 months

Docking pipeline — D/E vessels per quarter

39
Q3
49
Q4
65
'27 Q1
52
'27 Q2
27
'27 Q3
40
'27 Q4
48
'28 Q1
42
'28 Q2

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 1,872 5–10% €400k–1,200k — vendor claim
Bulbous bow reprofiling 1,753 2–6% €300k–900k — vendor claim
Methanol dual-fuel conversion 1,191 5–15% €8,000k–20,000k — vendor claim
LNG dual-fuel conversion 1,157 15–25% €15,000k–35,000k — vendor claim
Turbocharger cut-out 858 1–3% €80k–250k — vendor claim
Shaft generator / PTO 776 3–6% €500–1,500/kW — vendor claim

Capex bands are indicative vendor/literature priors. Payback appears once price parameters are configured.

Retrofit opportunity in this segment

386
D/E vessels with at least one eligible measure
€1,607–3,828M
capex range, top measure per vessel (386 of 386 with computable scaling)
0.25–0.47 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 CAPTAIN JOHN
IMO 9692832
 113,876 2014
3.5
B
651 SFL THELON
IMO 9593000
 159,500 2010
3.5
B
654 TP SPIRIT
IMO 9645413
 114,139 2016
3.5
B
656 SFL TAURUS
IMO 9978339
 109,895 2024
3.5
B
653 DELTA BLUE
IMO 9601235
 158,322 2012
3.5
B
655 FRONT CASTOR
IMO 9780251
 111,088 2017
3.5
B
658 SEAODYSSEY
IMO 9740419
 113,176 2017
3.5
B
657 FRONT ALTAIR
IMO 9745902
 109,894 2016
3.5
B
659 NAVIG8 WOLF
IMO 9935301
 109,999 2023
3.5
B
662 BRIGHTWAY
IMO 9588146
 160,095 2012
3.5
B
661 SPETSES LADY
IMO 9831074
 109,992 2020
3.5
B
660 NORDDOLPHIN
IMO 9779977
 113,955 2017
3.5
B
663 MINERVA GEORGIA
IMO 9332157
 163,417 2008
3.5
B
666 MIKELA P.
IMO 9440382
 158,007 2009
3.5
B
665 EAGLE LYON
IMO 9795115
 113,808 2017
3.5
B
667 RONG LIN WAN
IMO 9783423
 109,783 2017
3.5
B
664 YANNIS P.
IMO 9411343
 158,149 2010
3.5
B
672 GREEN AURA
IMO 9808168
 112,684 2019
3.5
B
671 TORM HERDIS
IMO 9797981
 115,109 2018
3.5
B
670 LYRIC MAGNOLIA
IMO 9734408
 109,999 2016
3.5
B
669 LEO SUN
IMO 9457608
 114,531 2011
3.5
B
668 MARE SICULUM
IMO 9457892
 158,466 2011
3.5
B
673 LUNARIA
IMO 9901063
 111,075 2019
3.5
B
674 MINERVA BALTICA
IMO 9728241
 113,172 2018
3.5
B
677 AITOLOS
IMO 9867619
 115,521 2020
3.5
B
676 VIOLANDO
IMO 9429285
 164,764 2009
3.5
B
675 WHITE MOON
IMO 9588158
 160,152 2012
3.5
B
678 BARBAROSA
IMO 9415399
 164,746 2009
3.5
B
681 PROTEUS BOHEMIA
IMO 9923437
 109,999 2020
3.5
B
680 FRONT FUSION
IMO 9887803
 109,899 2021
3.5
B
679 FRONT FAVOUR
IMO 9903968
 109,893 2021
3.5
B
682 IONIC ARIADNE
IMO 9856555
 112,007 2020
3.5
B
683 SELIGER
IMO 9402263
 115,126 2009
3.5
B
685 GREEN ADMIRE
IMO 9927196
 114,377 2022
3.5
B
684 SPYROS K
IMO 9565948
 157,647 2009
3.5
B
686 FRONT BRAGE
IMO 9418614
 156,557 2011
3.5
B
689 YUAN TANG WAN
IMO 9846005
 113,683 2020
3.6
B
688 HAFNIA GALATEA
IMO 9796975
 109,990 2019
3.6
B
687 NAVIG8 PERSEVERANCE
IMO 9853266
 109,997 2019
3.6
B
691 AMAX AVENUE
IMO 9419450
 115,789 2010
3.6
B
694 NORDPENGUIN
IMO 9783007
 112,038 2018
3.6
B
693 NAVE COSMOS
IMO 9971707
 115,650 2022
3.6
B
692 SEAFAITH
IMO 9843209
 111,964 2020
3.6
B
690 ELIAS TSAKOS
IMO 9724075
 113,736 2016
3.6
B
698 PACIFIC CORAL
IMO 9893113
 113,306 2022
3.6
B
697 SOHO SQUARE
IMO 9505819
 114,900 2012
3.6
B
696 ARDAS I
IMO 9930624
 115,335 2023
3.6
B
695 MINERVA ELEFTHERIA
IMO 9787168
 114,696 2018
3.6
B
700 ROSS SEA
IMO 9457593
 114,542 2006
3.6
B
699 PROTEUS SINEAD
IMO 9923413
 109,999 2022
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.