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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 2025. Lower is greener. Pick a segment and size class to see the greenest vessels first.

Segment rank (2025)
#547 of 1,651 oil tankers
CO₂ intensity
3.3 g CO₂/dwt·nm
vs segment average (5.18)
-36% 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
1,685
vessels ranked
1.32
greenest (g CO₂/dwt·nm)
4.01
segment median
# Vessel Size (DWT) Built Carbon intensity — AER (g CO₂/dwt·nm) Grade
500 STAVANGER TS
IMO 9737395
 113,004 2017
3.3
B
504 ALMI EXPLORER
IMO 9579547
 157,787 2013
3.3
B
503 TORTUGA
IMO 9998547
 115,302 2025
3.3
B
502 PEGASUS STAR
IMO 9891672
 116,120 2021
3.3
B
511 FRONT CAPELLA
IMO 9790995
 111,000 2017
3.3
B
510 TORM HELENE
IMO 9904871
 115,575 2021
3.3
B
509 VST OCEANIA
IMO 9740469
 109,985 2017
3.3
B
508 EBN HAWKEL
IMO 9874507
 112,003 2021
3.3
B
507 BEIJING SPIRIT
IMO 9418597
 156,493 2010
3.3
B
506 SOLA TS
IMO 9724350
 112,939 2017
3.3
B
513 ATLANTIC EMERALD
IMO 9892975
 109,201 2022
3.3
B
512 ANDROMEDA
IMO 9943061
 114,811 2023
3.3
B
505 ADEBOLA ADELINE
IMO 9427627
 156,813 2006
3.3
B
515 SEA TURTLE
IMO 9886718
 114,085 2021
3.3
B
517 HUMBLE WARRIOR
IMO 9856361
 149,990 2020
3.3
B
514 GHAT
IMO 9930105
 115,519 2022
3.3
B
520 NOUNOU
IMO 9960980
 115,322 2023
3.3
B
519 SFL TUCANA
IMO 9978327
 109,895 2024
3.3
B
518 BERKELEY SQUARE
IMO 1027914
 113,903 2025
3.3
B
516 ADVANTAGE SPICE
IMO 9419888
 156,657 2006
3.3
B
521 CRYSTAL
IMO 9956020
 113,385 2021
3.3
B
523 ACHILLEAS
IMO 9458494
 157,883 2010
3.3
B
522 ABLIANI
IMO 9693068
 109,999 2013
3.3
B
526 LYRIC MAGNOLIA
IMO 9734408
 109,999 2016
3.3
B
525 IONIC ANAX
IMO 9802152
 114,720 2017
3.3
B
527 CAPTAIN PARIS
IMO 9692844
 113,876 2014
3.3
B
524 SEA STAR
IMO 9945289
 109,999 2023
3.3
B
528 BELGRAVE SQUARE
IMO 1027926
 113,804 2025
3.3
B
529 DELTA POSEIDON
IMO 9468671
 157,380 2011
3.3
B
531 HANOVER SQUARE
IMO 9783992
 114,366 2019
3.3
B
534 EAGLE BRASILIA
IMO 9795062
 114,000 2019
3.3
B
533 HENRIQUE DIAS
IMO 9453834
 157,055 2014
3.3
B
532 RESILIENT WARRIOR
IMO 9856359
 149,990 2020
3.3
B
535 SIGRUN
IMO 9612052
 156,092 2013
3.3
B
530 BOSSA NOVA SPIRIT
IMO 9637703
 154,199 2013
3.3
B
536 AIFANOURIOS
IMO 9891696
 116,015 2021
3.3
B
537 LIPARI
IMO 9529487
 158,237 2012
3.3
B
538 SEMAKAU SPIRIT
IMO 9833723
 115,643 2019
3.3
B
542 RYMAN
IMO 9777931
 113,000 2017
3.3
B
541 TORM HANNAH
IMO 9712864
 109,999 2016
3.3
B
540 SEA PANTHER
IMO 9802164
 114,723 2018
3.3
B
539 ROBOLA
IMO 1021790
 113,613 2023
3.3
B
546 MARLIN LAGOS
IMO 9823584
 114,853 2022
3.3
B
545 SEA GARNET
IMO 9772943
 158,454 2015
3.3
B
544 FRONT CHEETAH
IMO 9686637
 109,900 2016
3.3
B
543 DELTA MED
IMO 9412309
 161,653 2010
3.3
B
550 SABRINA GLORY
IMO 9959929
 115,397 2024
3.3
B
549 SFL TAURUS
IMO 9978339
 109,895 2024
3.3
B
548 JARNAIN
IMO 9823546
 114,831 2021
3.3
B
547 ORCHID SPIRIT
IMO 9901867
 112,750 2021
3.3
B
Page 11 of 34 — 1,651 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 2025 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.