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 · 35 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 | 109 | 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 |
|---|---|---|---|---|---|
| 51 |
GASLOG WALES
IMO 9853137
|
93,076 | 2018 |
4.9
|
A |
| 52 |
LNGSHIPS EMPRESS
IMO 9875800
|
94,000 | 2018 |
4.9
|
A |
| 53 |
DIAMOND GAS CRYSTAL
IMO 9874454
|
89,846 | 2018 |
5.0
|
A |
| 54 |
DIAMOND GAS METROPOLIS
IMO 9862487
|
89,846 | 2018 |
5.0
|
A |
| 55 |
HLS CARTAGENA
IMO 9947691
|
94,926 | 2021 |
5.0
|
A |
| 56 |
GASLOG WESTMINSTER
IMO 9855812
|
92,799 | 2018 |
5.0
|
A |
| 57 |
NORTH MOUNTAIN
IMO 9953511
|
88,798 | 2023 |
5.0
|
A |
| 58 |
SK RESOLUTE
IMO 9693173
|
94,665 | 2018 |
5.0
|
A |
| 60 |
GLOBAL SEA SPIRIT
IMO 9880465
|
93,080 | 2021 |
5.0
|
A |
| 59 |
EXTREMADURA KNUTSEN
IMO 9918157
|
95,548 | 2023 |
5.0
|
A |
| 61 |
FLEX VOLUNTEER
IMO 9862463
|
93,608 | 2021 |
5.1
|
A |
| 63 |
CELSIUS GLARUS
IMO 9945459
|
92,385 | 2024 |
5.1
|
A |
| 62 |
LNG ADVENTURE
IMO 9870159
|
88,817 | 2021 |
5.1
|
A |
| 64 |
MINERVA AMORGOS
IMO 9885855
|
88,236 | 2019 |
5.1
|
A |
| 65 |
MINERVA PSARA
IMO 9854363
|
96,000 | 2018 |
5.1
|
B |
| 68 |
MINERVA LIMNOS
IMO 9854375
|
94,834 | 2021 |
5.1
|
B |
| 67 |
TENERGY
IMO 9892456
|
93,649 | 2022 |
5.1
|
B |
| 66 |
BW LILAC
IMO 9758076
|
90,714 | 2018 |
5.1
|
B |
| 69 |
ENERGY INTELLIGENCE
IMO 9881201
|
94,649 | 2021 |
5.1
|
B |
| 70 |
LNG ENTERPRISE
IMO 9874480
|
88,744 | 2021 |
5.1
|
B |
| 71 |
MEGARA
IMO 9770945
|
95,212 | 2018 |
5.1
|
B |
| 72 |
LNG ENDURANCE
IMO 9874492
|
88,721 | 2021 |
5.2
|
B |
| 73 |
PEARL LNG
IMO 9862346
|
94,000 | 2018 |
5.2
|
B |
| 74 |
ID'ASAH
IMO 9977220
|
88,053 | 2022 |
5.2
|
B |
| 75 |
BW CASSIA
IMO 9896933
|
94,000 | 2022 |
5.2
|
B |
| 76 |
ELISA AQUILA
IMO 9884473
|
95,132 | 2022 |
5.2
|
B |
| 77 |
GASLOG WINDSOR
IMO 9819650
|
92,764 | 2018 |
5.2
|
B |
| 78 |
LNG ROSENROT
IMO 9877133
|
98,936 | 2021 |
5.2
|
B |
| 79 |
LNG MEGREZ
IMO 9834325
|
91,430 | 2020 |
5.3
|
B |
| 80 |
ORION SUN
IMO 9889916
|
88,592 | 2019 |
5.3
|
B |
| 81 |
LNG SCHNEEWEISSCHEN
IMO 9771913
|
98,747 | 2018 |
5.3
|
B |
| 83 |
NUAIJAH
IMO 9976903
|
94,326 | 2024 |
5.3
|
B |
| 82 |
MARVEL SWALLOW
IMO 9963449
|
93,510 | 2024 |
5.3
|
B |
| 84 |
SEAPEAK YAMAL
IMO 9781920
|
91,610 | 2019 |
5.3
|
B |
| 85 |
ENERGY PACIFIC
IMO 9854612
|
94,649 | 2020 |
5.3
|
B |
| 87 |
FLEX ARTEMIS
IMO 9851634
|
95,450 | 2020 |
5.3
|
B |
| 86 |
ALICANTE KNUTSEN
IMO 9904194
|
95,548 | 2022 |
5.3
|
B |
| 88 |
CELSIUS GIZA
IMO 9945447
|
92,385 | 2023 |
5.3
|
B |
| 89 |
NORTH WAY
IMO 9953535
|
88,709 | 2024 |
5.4
|
B |
| 90 |
ORION SEA
IMO 9889904
|
88,592 | 2019 |
5.4
|
B |
| 91 |
ENERGY INTEGRITY
IMO 9859739
|
94,649 | 2018 |
5.4
|
B |
| 92 |
SK AUDACE
IMO 9693161
|
94,665 | 2017 |
5.4
|
B |
| 93 |
LNG ENDEAVOUR
IMO 9893606
|
88,798 | 2021 |
5.4
|
B |
| 94 |
VENTURE BAYOU
IMO 9958846
|
88,001 | 2021 |
5.4
|
B |
| 95 |
QOGIR
IMO 9851787
|
94,000 | 2018 |
5.5
|
B |
| 96 |
MOL HESTIA
IMO 9885996
|
93,799 | 2021 |
5.5
|
B |
| 99 |
GASLOG HOUSTON
IMO 9748899
|
92,345 | 2018 |
5.5
|
B |
| 98 |
MYRINA
IMO 9770933
|
95,378 | 2018 |
5.5
|
B |
| 97 |
SM BLUEBIRD
IMO 9902914
|
95,641 | 2022 |
5.5
|
B |
| 100 |
GASLOG HONG KONG
IMO 9748904
|
92,266 | 2018 |
5.5
|
B |
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.