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 2024. Lower is greener. Pick a segment and size class to see the greenest vessels first.
CII band distribution
1,081 at D/E2,510 rated vessels · 463 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 | 1,485 | 1–3% | €80k–250k | — | vendor claim |
| Propeller redesign / replacement | 1,440 | 5–10% | €400k–1,200k | — | vendor claim |
| Bulbous bow reprofiling | 1,344 | 2–6% | €300k–900k | — | vendor claim |
| Methanol dual-fuel conversion | 965 | 5–15% | €8,000k–20,000k | — | vendor claim |
| LNG dual-fuel conversion | 795 | 15–25% | €15,000k–35,000k | — | vendor claim |
| Shaft generator / PTO | 360 | 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 |
| SEPELU · <25k | E | 26y | 2026 |
| MSC SABRINA III · <25k | E | 37y | 2026 |
| NILEDUTCH LION · 100-200k | E | 18y | 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 |
PAFILIA
IMO 9322853
|
712 TEU | 2006 |
25.1
|
E |
| 2002 |
VERONICA B
IMO 9436305
|
803 TEU | 2011 |
25.1
|
E |
| 2003 |
MACARENA B
IMO 9277400
|
864 TEU | 2003 |
25.3
|
E |
| 2004 |
LOUISE BORCHARD
IMO 9336294
|
660 TEU | 2006 |
25.3
|
E |
| 2005 |
ILHA DA MADEIRA
IMO 9202077
|
712 TEU | 1999 |
25.3
|
E |
| 2006 |
X-PRESS ELBE
IMO 9483669
|
1,036 TEU | 2010 |
25.5
|
E |
| 2007 |
EMILIA
IMO 9197521
|
700 TEU | 2010 |
25.6
|
E |
| 2008 |
MSC LENA F
IMO 9347762
|
916 TEU | 2006 |
25.7
|
E |
| 2009 |
ENCOUNTER
IMO 9255775
|
750 TEU | 2004 |
25.7
|
E |
| 2010 |
SKY LIGHT
IMO 9118513
|
1,042 TEU | 1996 |
25.7
|
E |
| 2011 |
SVEN-D
IMO 9302243
|
809 TEU | 2005 |
25.7
|
E |
| 2012 |
ELBE
IMO 9244180
|
660 TEU | 2001 |
25.7
|
E |
| 2013 |
ENERGY
IMO 9255787
|
750 TEU | 2004 |
25.7
|
E |
| 2014 |
K-RIVER
IMO 9138355
|
700 TEU | 1997 |
25.7
|
E |
| 2015 |
STAR COMET
IMO 9242596
|
735 TEU | 2002 |
25.8
|
E |
| 2016 |
ENFORCER
IMO 9255737
|
750 TEU | 2003 |
25.9
|
E |
| 2017 |
WEGA
IMO 9141118
|
749 TEU | 1996 |
25.9
|
E |
| 2018 |
MAX
IMO 9351098
|
724 TEU | 2006 |
26.0
|
E |
| 2019 |
MEDKON LUNA
IMO 9341976
|
698 TEU | 2007 |
26.0
|
E |
| 2020 |
SALGUEIRO
IMO 9301562
|
1,100 TEU | 2005 |
26.0
|
E |
| 2021 |
CONTSHIP IVY
IMO 9371402
|
925 TEU | 2007 |
26.1
|
E |
| 2022 |
FENJA
IMO 9287716
|
864 TEU | 2003 |
26.1
|
E |
| 2023 |
X-PRESS MULHACEN
IMO 9365960
|
767 TEU | 2008 |
26.2
|
E |
| 2024 |
HANNI
IMO 9188506
|
658 TEU | 1998 |
26.3
|
E |
| 2025 |
ALOPO
IMO 9329564
|
698 TEU | 2004 |
26.3
|
E |
| 2026 |
NJORD
IMO 9349227
|
809 TEU | 2007 |
26.3
|
E |
| 2027 |
SCARLETTA
IMO 9449699
|
916 TEU | 2008 |
26.3
|
E |
| 2028 |
CONTSHIP SKY
IMO 9403449
|
1,118 TEU | 2008 |
26.4
|
E |
| 2029 |
PANTONIO
IMO 9440576
|
698 TEU | 2007 |
26.4
|
E |
| 2030 |
REBECCA S
IMO 9428205
|
698 TEU | 2007 |
26.4
|
E |
| 2031 |
PACIFIC DALIAN
IMO 9339090
|
698 TEU | 2008 |
26.4
|
E |
| 2032 |
CONTSHIP VIE
IMO 9434802
|
1,100 TEU | 2007 |
26.4
|
E |
| 2033 |
HELENE
IMO 9362956
|
916 TEU | 2007 |
26.6
|
E |
| 2034 |
SKOGAFOSS
IMO 9375252
|
698 TEU | 2007 |
26.6
|
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 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.