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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)
#150 of 1,789 oil tankers
CO₂ intensity
2.3 g CO₂/dwt·nm
vs segment average (5.1)
-55% greener
A
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 556C 557D 354E 197

2,075 rated vessels · 277 of the D/E set dock within 12 months

Docking pipeline — D/E vessels per quarter

53
Q4
60
'27 Q1
57
'27 Q2
37
'27 Q3
45
'27 Q4
71
'28 Q1
43
'28 Q2
34
'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 1,874 5–10% €400k–1,200k — vendor claim
Bulbous bow reprofiling 1,757 2–6% €300k–900k — vendor claim
Turbocharger cut-out 1,360 1–3% €80k–250k — vendor claim
Methanol dual-fuel conversion 1,195 5–15% €8,000k–20,000k — vendor claim
Rotor sails (per unit) 1,174 route-dependent €1,500k–3,500k — vendor claim
Suction wing sails (per unit) 1,174 route-dependent €1,000k–2,500k — vendor claim

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

Retrofit opportunity in this segment

411
D/E vessels with at least one eligible measure
€1,668–3,970M
capex range, top measure per vessel (411 of 411 with computable scaling)
0.26–0.49 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
101 CEDAR
IMO 9907433
 158,289 2022
2.0
A
103 SEAWAYS DIAMOND HEAD
IMO 9727039
 301,037 2016
2.0
A
102 NISSOS KEA
IMO 9920758
 300,323 2022
2.0
A
104 EAGLE VICTORIA
IMO 9739513
 299,392 2016
2.0
A
105 AMORE MIO
IMO 9926685
 299,847 2020
2.0
A
109 NEW CONSTANT
IMO 9708514
 318,862 2016
2.1
A
108 FOLEGANDROS
IMO 9793753
 159,221 2018
2.1
A
107 AGITOS
IMO 9830824
 320,784 2019
2.1
A
106 SEADUCHESS
IMO 9876440
 313,164 2022
2.1
A
110 NEW COURAGE
IMO 9686352
 318,989 2013
2.1
A
111 ALMI HERCULES
IMO 9583732
 319,359 2014
2.1
A
112 PERTAMINA PRIME
IMO 9888508
 302,094 2021
2.1
A
114 KALLIOPI
IMO 9508859
 296,659 2010
2.1
A
113 MAXIM
IMO 9604079
 296,887 2011
2.1
A
116 ILMA
IMO 9588392
 314,000 2012
2.1
A
115 SEAWAYS TRITON
IMO 9734654
 300,932 2016
2.1
A
117 CELESTE NOVA
IMO 9534054
 318,510 2013
2.1
A
120 TEXAS
IMO 9623685
 299,999 2012
2.1
A
119 FRONT PRINCE
IMO 9788899
 301,187 2017
2.1
A
118 CYPRES
IMO 9907445
 158,388 2022
2.1
A
121 BABYLON
IMO 9878826
 299,700 2020
2.1
A
123 PACIFIC
IMO 9912141
 158,405 2022
2.1
A
122 FRONT PRINCESS
IMO 9788904
 301,575 2018
2.1
A
127 FRONT TWEED
IMO 9920784
 299,986 2022
2.2
A
126 ARZANAH
IMO 9928023
 299,425 2023
2.2
A
125 ANDROMEDA
IMO 9352561
 321,300 2008
2.2
A
124 SUR
IMO 9870824
 299,997 2020
2.2
A
128 AEGEAN VISION
IMO 9645437
 158,888 2017
2.2
A
129 BRUGGE
IMO 9941855
 157,138 2023
2.2
A
131 OLYMPIC LIGHT
IMO 9424273
 317,106 2011
2.2
A
130 HORTEN
IMO 9740342
 297,638 2014
2.2
A
132 SEAWAYS HENDRICKS
IMO 9727015
 301,014 2016
2.2
A
134 SONANGOL NJINGA MBANDE
IMO 9938494
 157,663 2023
2.2
A
133 EAGLE SAN FRANCISCO
IMO 9795127
 157,512 2018
2.2
A
135 AS SUWAYQ
IMO 9500728
 319,439 2012
2.2
A
136 MARAN ATHENA
IMO 9770505
 319,398 2016
2.2
A
141 AZURE NOVA
IMO 9602631
 319,743 2012
2.2
A
140 ADVANTAGE VALUE
IMO 9376749
 297,556 2009
2.2
A
139 GREENWAY
IMO 9900796
 157,327 2022
2.2
A
138 SEADUKE
IMO 9890965
 313,051 2021
2.2
A
137 SEAWAYS CAPE HENRY
IMO 9727003
 300,932 2016
2.2
A
142 DHALKUT
IMO 9888601
 300,000 2019
2.2
A
144 AMPHION
IMO 9830795
 320,784 2019
2.2
A
145 DHT AMAZON
IMO 9528794
 318,130 2011
2.2
A
143 YASA SCORPION
IMO 9643271
 313,998 2013
2.2
A
147 VL BRILLIANT
IMO 9683673
 319,300 2014
2.3
A
146 XIN DAN YANG
IMO 9614048
 322,829 2013
2.3
A
149 NEW TREASURE
IMO 9799214
 307,105 2019
2.3
A
148 BREST
IMO 9941867
 157,071 2023
2.3
A
150 HAFEET
IMO 9928009
 299,425 2023
2.3
A
Page 3 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.