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 |
|---|---|---|---|---|---|
| 151 |
MARVEL HERON
IMO 9770440
|
97,654 | 2015 |
6.3
|
C |
| 152 |
RIOJA KNUTSEN
IMO 9721736
|
92,782 | 2016 |
6.4
|
C |
| 153 |
MARVEL HAWK
IMO 9760770
|
85,000 | 2018 |
6.4
|
C |
| 154 |
MARAN GAS LETO
IMO 9682576
|
92,846 | 2016 |
6.4
|
C |
| 155 |
LNG BONNY II
IMO 9692002
|
87,674 | 2015 |
6.4
|
C |
| 156 |
MAGDALA
IMO 9770921
|
95,449 | 2018 |
6.4
|
C |
| 157 |
GASLOG GENEVA
IMO 9707508
|
94,400 | 2013 |
6.4
|
C |
| 158 |
HLS BILBAO
IMO 9941013
|
94,927 | 2024 |
6.4
|
C |
| 159 |
ADAM LNG
IMO 9501186
|
90,986 | 2014 |
6.4
|
C |
| 160 |
ORION MONET
IMO 9888766
|
88,779 | 2022 |
6.5
|
C |
| 161 |
BW HELIOS
IMO 9873852
|
88,726 | 2021 |
6.6
|
C |
| 162 |
CASTILLO DE CALDELAS
IMO 9742819
|
93,241 | 2018 |
6.6
|
C |
| 163 |
VALENCIA KNUTSEN
IMO 9434266
|
100,789 | 2010 |
6.6
|
C |
| 164 |
LNG FINIMA II
IMO 9690145
|
86,867 | 2015 |
6.6
|
C |
| 165 |
PALU LNG
IMO 9636735
|
89,874 | 2014 |
6.7
|
C |
| 166 |
WILPRIDE
IMO 9627966
|
87,677 | 2013 |
6.7
|
C |
| 167 |
CLEAN PLANET
IMO 9637507
|
89,848 | 2014 |
6.7
|
C |
| 168 |
BRITISH CONTRIBUTOR
IMO 9766554
|
94,558 | 2018 |
6.7
|
C |
| 169 |
ENERGY UNIVERSE
IMO 9758844
|
88,700 | 2019 |
6.7
|
C |
| 170 |
GASLOG WARSAW
IMO 9816763
|
85,000 | 2016 |
6.7
|
C |
| 171 |
BW TULIP
IMO 9758064
|
90,522 | 2018 |
6.8
|
C |
| 172 |
GASLOG SEATTLE
IMO 9634086
|
81,982 | 2013 |
6.8
|
C |
| 173 |
LA MANCHA KNUTSEN
IMO 9721724
|
92,802 | 2016 |
6.9
|
C |
| 174 |
KOOL FROST
IMO 9655042
|
82,005 | 2014 |
6.9
|
C |
| 175 |
LNG LAGOS II
IMO 9692014
|
87,745 | 2016 |
6.9
|
C |
| 176 |
KOOL ICE
IMO 9637325
|
81,534 | 2015 |
6.9
|
C |
| 177 |
WILFORCE
IMO 9627954
|
87,750 | 2013 |
6.9
|
C |
| 178 |
BRITISH MENTOR
IMO 9766578
|
94,528 | 2019 |
7.0
|
C |
| 179 |
CLEAN OCEAN
IMO 9637492
|
89,956 | 2014 |
7.0
|
C |
| 180 |
CLEAN HORIZON
IMO 9655444
|
89,831 | 2015 |
7.0
|
C |
| 181 |
KOOL GLACIER
IMO 9654696
|
90,248 | 2014 |
7.1
|
C |
| 182 |
SAINT BARBARA
IMO 9946386
|
95,440 | 2023 |
7.1
|
C |
| 183 |
SHAOLIN
IMO 9915894
|
91,752 | 2022 |
7.2
|
C |
| 184 |
YENISEI RIVER
IMO 9629586
|
84,565 | 2013 |
7.2
|
C |
| 185 |
UMM AL AMAD
IMO 9360829
|
121,730 | 2008 |
7.2
|
C |
| 186 |
AL KHATTIYA
IMO 9431111
|
121,946 | 2009 |
7.3
|
C |
| 187 |
SOYO
IMO 9475208
|
82,857 | 2011 |
7.3
|
C |
| 188 |
MURWAB
IMO 9360805
|
121,843 | 2008 |
7.3
|
C |
| 189 |
AL RUWAIS
IMO 9337951
|
121,823 | 2007 |
7.3
|
C |
| 190 |
KOOL BOREAS
IMO 9654880
|
93,286 | 2015 |
7.4
|
C |
| 191 |
AL AAMRIYA
IMO 9338266
|
121,935 | 2008 |
7.4
|
D |
| 192 |
KOOL BLIZZARD
IMO 9635315
|
81,100 | 2015 |
7.4
|
D |
| 193 |
VENTURE GATOR
IMO 9956599
|
87,950 | 2024 |
7.5
|
D |
| 194 |
BW BRUSSELS
IMO 9368314
|
84,483 | 2009 |
7.5
|
D |
| 195 |
DUHAIL
IMO 9337975
|
121,639 | 2008 |
7.6
|
D |
| 196 |
METHANE BECKI ANNE
IMO 9516129
|
86,268 | 2010 |
7.6
|
D |
| 197 |
GASLOG SKAGEN
IMO 9626285
|
81,846 | 2013 |
7.6
|
D |
| 198 |
BW ENN CRYSTAL SKY
IMO 9383900
|
100,524 | 2011 |
7.7
|
D |
| 199 |
AL SAFLIYA
IMO 9337963
|
121,963 | 2007 |
7.7
|
D |
| 200 |
AL NUAMAN
IMO 9431135
|
121,910 | 2009 |
7.7
|
D |
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.