Container Ship 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.
CII band distribution
1,079 at D/E2,510 rated vessels · 552 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 |
|---|---|---|---|---|---|
| Turbocharger cut-out | 1,640 | 1–3% | €80k–250k | — | vendor claim |
| Propeller redesign / replacement | 1,427 | 5–10% | €400k–1,200k | — | vendor claim |
| Bulbous bow reprofiling | 1,330 | 2–6% | €300k–900k | — | vendor claim |
| Methanol dual-fuel conversion | 933 | 5–15% | €8,000k–20,000k | — | vendor claim |
| LNG dual-fuel conversion | 763 | 15–25% | €15,000k–35,000k | — | vendor claim |
| Shaft generator / PTO | 348 | 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
Retrofit prospects — worst band first
| Vessel | Band | Age | Drop year |
|---|---|---|---|
| HANSA AFRICA · 25-60k | E | 16y | 2026 |
| MSC ANNAMARIA · <25k | E | 1y | 2026 |
| SEPELU · <25k | E | 26y | 2026 |
| C LION · 100-200k | E | 21y | 2026 |
| HAMBURG TRADER · <25k | E | 21y | 2026 |
Note: Container/ro-ro cargo ship vessels are excluded from this ranking — their CII type is a per-vessel flag-state determination, so no valid comparison metric exists for them.
| # | Vessel | Size (TEU) | Built | Carbon intensity — AER (g CO₂/dwt·nm) | Grade |
|---|---|---|---|---|---|
| 2001 |
SALGUEIRO
IMO 9301562
|
1,118 TEU | 2005 |
20.6
|
E |
| 2002 |
TUNADAL
IMO 9429235
|
1,025 TEU | 2012 |
20.7
|
E |
| 2003 |
MSC VULCANO II
IMO 9313228
|
1,638 TEU | 2005 |
20.7
|
E |
| 2004 |
LOLA B
IMO 9353723
|
917 TEU | 2007 |
20.7
|
E |
| 2005 |
NIEVES B
IMO 9483683
|
1,036 TEU | 2011 |
20.7
|
E |
| 2006 |
PIRITA
IMO 9108063
|
660 TEU | 1995 |
20.8
|
E |
| 2007 |
DIONYSSIS A
IMO 9356660
|
1,000 TEU | 2006 |
20.8
|
E |
| 2008 |
ODYSSEY
IMO 9252773
|
862 TEU | 2002 |
20.8
|
E |
| 2009 |
ANDROMEDA J
IMO 9355422
|
962 TEU | 2006 |
20.9
|
E |
| 2010 |
MSC OLGA F
IMO 9336359
|
1,118 TEU | 2006 |
20.9
|
E |
| 2011 |
MED IZMIR
IMO 9143879
|
951 TEU | 1998 |
20.9
|
E |
| 2012 |
GFS LETO
IMO 9346562
|
1,114 TEU | 2006 |
20.9
|
E |
| 2013 |
JASPER WIND
IMO 9368041
|
907 TEU | 2010 |
20.9
|
E |
| 2014 |
TROUPER
IMO 9326952
|
868 TEU | 2005 |
21.0
|
E |
| 2015 |
CONESTE
IMO 9252802
|
862 TEU | 2003 |
21.1
|
E |
| 2016 |
DAGMAR
IMO 9354399
|
868 TEU | 2006 |
21.1
|
E |
| 2017 |
ADELINA
IMO 9306079
|
1,578 TEU | 2006 |
21.1
|
E |
| 2018 |
CONTAINERSHIPS VI
IMO 9188518
|
966 TEU | 1999 |
21.1
|
E |
| 2019 |
CONTSHIP VOW
IMO 9395599
|
1,080 TEU | 2007 |
21.1
|
E |
| 2020 |
MSC POTOMAC F
IMO 9236274
|
1,155 TEU | 2002 |
21.1
|
E |
| 2021 |
BG JADE
IMO 9803687
|
1,004 TEU | 2018 |
21.2
|
E |
| 2022 |
QUEEN NM
IMO 9234991
|
868 TEU | 2001 |
21.2
|
E |
| 2023 |
CONTSHIP SKY
IMO 9403449
|
1,118 TEU | 2008 |
21.2
|
E |
| 2024 |
LM HERMES
IMO 9374117
|
1,118 TEU | 2004 |
21.2
|
E |
| 2025 |
PERSEUS
IMO 9371414
|
925 TEU | 2008 |
21.2
|
E |
| 2026 |
X-PRESS TAGUS
IMO 9354375
|
868 TEU | 2007 |
21.2
|
E |
| 2027 |
CARLOTA B
IMO 9404065
|
803 TEU | 2007 |
21.2
|
E |
| 2028 |
SAMSKIP EXPRESS
IMO 9323479
|
803 TEU | 2006 |
21.3
|
E |
| 2029 |
TAMANRASSET
IMO 9760615
|
1,700 TEU | 2017 |
21.3
|
E |
| 2030 |
MSC OAK F
IMO 9373917
|
1,118 TEU | 2007 |
21.3
|
E |
| 2031 |
SARA BORCHARD
IMO 9354428
|
868 TEU | 2007 |
21.3
|
E |
| 2032 |
X-PRESS AGILITY
IMO 9483671
|
1,036 TEU | 2010 |
21.4
|
E |
| 2033 |
ELBWINTER
IMO 9398773
|
1,036 TEU | 2008 |
21.4
|
E |
| 2034 |
CHRISTINA
IMO 9429211
|
877 TEU | 2010 |
21.4
|
E |
| 2035 |
WEC CORNEILLE
IMO 9326940
|
862 TEU | 2005 |
21.4
|
E |
| 2036 |
MIRIAM BORCHARD
IMO 9246554
|
868 TEU | 2004 |
21.5
|
E |
| 2037 |
CONTSHIP NEW
IMO 9373905
|
1,118 TEU | 2007 |
21.5
|
E |
| 2038 |
BEATE
IMO 9333345
|
868 TEU | 2005 |
21.5
|
E |
| 2039 |
ELI A
IMO 9326976
|
868 TEU | 2005 |
21.5
|
E |
| 2040 |
CONTSHIP GIN
IMO 9517434
|
1,345 TEU | 2011 |
21.6
|
E |
| 2041 |
CHS ALPHA
IMO 9301081
|
917 TEU | 2005 |
21.6
|
E |
| 2042 |
JAGUAR
IMO 9127007
|
1,122 TEU | 1996 |
21.7
|
E |
| 2043 |
FAITH
IMO 9301108
|
900 TEU | 2006 |
21.7
|
E |
| 2044 |
KANTATA
IMO 9327580
|
1,118 TEU | 2006 |
21.8
|
E |
| 2045 |
MSC AMANDA F
IMO 9319600
|
916 TEU | 2006 |
21.8
|
E |
| 2046 |
PAVO J
IMO 9355458
|
962 TEU | 2007 |
21.8
|
E |
| 2047 |
DIANA B
IMO 9344239
|
974 TEU | 2006 |
21.8
|
E |
| 2048 |
LUCIA B
IMO 9404077
|
803 TEU | 2007 |
21.8
|
E |
| 2049 |
DINA TRADER
IMO 9354442
|
868 TEU | 2007 |
21.8
|
E |
| 2050 |
VOHBURG
IMO 9287807
|
812 TEU | 2005 |
21.9
|
E |
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.
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.