LNG Carrier 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.
CII band distribution
72 at D/E448 rated vessels · 38 of the D/E set dock within 12 months
Docking pipeline — D/E vessels per quarter
Windows estimated from the class-expiry docking model, not bookings.
Top eligible retrofit measures for this segment
| Measure | Eligible | CO₂ reduction | Capex band | Payback | Confidence |
|---|---|---|---|---|---|
| Propeller redesign / replacement | 374 | 5–10% | €400k–1,200k | — | vendor claim |
| Shaft generator / PTO | 156 | 3–6% | €500–1,500/kW | — | vendor claim |
| Turbocharger cut-out | 75 | 1–3% | €80k–250k | — | vendor claim |
| Exhaust waste heat recovery | 73 | 3–8% | €800–2,000/kW | — | vendor claim |
Capex bands are indicative vendor/literature priors. Payback appears once price parameters are configured.
Retrofit opportunity in this segment
Retrofit prospects — worst band first
| Vessel | Band | Age | Drop year |
|---|---|---|---|
| EXCELSIOR · 60-100k | E | 21y | 2026 |
| GAS AGILITY · <25k | E | 6y | 2026 |
| GREEN ZEEBRUGGE · <25k | E | 9y | 2026 |
| GAS POLARIS · 60-100k | E | 24y | 2026 |
| ENERGOS POWER · 60-100k | E | 5y | 2026 |
| # | Vessel | Size (DWT) | Built | Carbon intensity — AER (g CO₂/dwt·nm) | Grade |
|---|---|---|---|---|---|
| 101 |
TRAIANO KNUTSEN
IMO 9854765
|
96,354 | 2020 |
5.5
|
B |
| 103 |
BW PAVILION ARANTHERA
IMO 9850678
|
90,400 | 2020 |
5.5
|
B |
| 102 |
HELLAS ATHINA
IMO 9872999
|
92,955 | 2021 |
5.5
|
B |
| 104 |
SERI DAYA
IMO 9896452
|
87,781 | 2023 |
5.5
|
B |
| 106 |
GAIL URJA
IMO 9949027
|
93,758 | 2023 |
5.5
|
B |
| 105 |
HELLAS DIANA
IMO 9872987
|
93,098 | 2018 |
5.5
|
B |
| 107 |
GASLOG GIBRALTAR
IMO 9707510
|
94,000 | 2013 |
5.5
|
B |
| 109 |
SEAPEAK BAHRAIN
IMO 9771080
|
95,289 | 2018 |
5.6
|
B |
| 108 |
IGNACY LUKASIEWICZ
IMO 9946398
|
95,440 | 2023 |
5.6
|
B |
| 110 |
AMBERJACK LNG
IMO 9845776
|
93,534 | 2020 |
5.7
|
B |
| 111 |
GAIL BHUWAN
IMO 9877145
|
98,882 | 2021 |
5.7
|
B |
| 112 |
LNG ABALAMABIE
IMO 9690171
|
86,925 | 2016 |
5.7
|
B |
| 113 |
PAN ASIA
IMO 9750220
|
88,613 | 2017 |
5.8
|
B |
| 114 |
LNG PHECDA
IMO 9834313
|
91,712 | 2020 |
5.8
|
B |
| 115 |
MARVEL FALCON
IMO 9760768
|
85,000 | 2018 |
5.8
|
B |
| 116 |
NORTH WAY
IMO 9953535
|
82,000 | 2024 |
5.8
|
B |
| 117 |
BW MAGNOLIA
IMO 9850666
|
90,625 | 2020 |
5.8
|
B |
| 118 |
ENERGY ENDEAVOUR
IMO 9854624
|
94,648 | 2021 |
5.8
|
B |
| 119 |
FLEX AURORA
IMO 9857365
|
93,775 | 2020 |
5.8
|
B |
| 120 |
GRAZYNA GESICKA
IMO 9922988
|
95,428 | 2023 |
5.8
|
B |
| 121 |
SEAPEAK OAK
IMO 9681699
|
95,412 | 2016 |
5.9
|
B |
| 122 |
WUDANG
IMO 9915909
|
91,466 | 2022 |
5.9
|
B |
| 123 |
BW PAVILION ARANDA
IMO 9792606
|
90,381 | 2019 |
5.9
|
B |
| 124 |
PAN AFRICA
IMO 9750256
|
88,613 | 2019 |
5.9
|
B |
| 125 |
LNG ABUJA II
IMO 9690169
|
87,147 | 2016 |
5.9
|
B |
| 126 |
CELSIUS COPENHAGEN
IMO 9864784
|
92,473 | 2020 |
5.9
|
B |
| 127 |
KOOL ORCA
IMO 9870525
|
92,969 | 2021 |
5.9
|
B |
| 128 |
BW LESMES
IMO 9873840
|
88,907 | 2021 |
5.9
|
B |
| 130 |
CELSIUS GENEVA
IMO 9945435
|
92,385 | 2023 |
6.0
|
C |
| 129 |
RIAS BAIXAS KNUTSEN
IMO 9825568
|
96,354 | 2019 |
6.0
|
C |
| 131 |
WEN CHENG
IMO 9892121
|
91,218 | 2023 |
6.0
|
C |
| 132 |
MARVEL EAGLE
IMO 9759240
|
83,571 | 2018 |
6.0
|
C |
| 133 |
EMEI
IMO 9958640
|
91,557 | 2023 |
6.0
|
C |
| 134 |
GASLOG GEORGETOWN
IMO 9864916
|
88,183 | 2020 |
6.0
|
C |
| 135 |
NEW NATURE
IMO 9926910
|
95,806 | 2024 |
6.0
|
C |
| 136 |
NORTH SKY
IMO 9953523
|
88,809 | 2024 |
6.0
|
C |
| 137 |
PAN AMERICAS
IMO 9750232
|
88,425 | 2018 |
6.0
|
C |
| 138 |
BRITISH LISTENER
IMO 9766566
|
94,494 | 2019 |
6.0
|
C |
| 139 |
NEW APEX
IMO 9929106
|
88,875 | 2023 |
6.1
|
C |
| 140 |
MARIA ENERGY
IMO 9659725
|
93,301 | 2016 |
6.1
|
C |
| 141 |
LNG DUBHE
IMO 9834296
|
91,587 | 2019 |
6.1
|
C |
| 142 |
PACIFIC SUCCESS
IMO 9903425
|
88,624 | 2027 |
6.1
|
C |
| 143 |
MUREX
IMO 9705641
|
95,235 | 2017 |
6.1
|
C |
| 144 |
CASTILLO DE SANTISTEBAN
IMO 9433717
|
93,796 | 2010 |
6.2
|
C |
| 145 |
LNG PORT HARCOURT II
IMO 9690157
|
87,139 | 2015 |
6.2
|
C |
| 147 |
CELSIUS GRANADA
IMO 9948736
|
92,385 | 2024 |
6.2
|
C |
| 146 |
SHINSHU MARU
IMO 9791200
|
82,287 | 2019 |
6.2
|
C |
| 148 |
LNG MERAK
IMO 9834301
|
91,451 | 2020 |
6.2
|
C |
| 149 |
AKTORAS
IMO 9958286
|
93,533 | 2024 |
6.3
|
C |
| 150 |
LNG GENEVA
IMO 9892133
|
91,305 | 2023 |
6.3
|
C |
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.
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.