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 · 443 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 |
|---|---|---|---|---|---|
| 851 |
MAERSK MONTE ALTO
IMO 9283227
|
4,000 TEU | 2005 |
7.0
|
B |
| 850 |
MSC BRITTANY
IMO 9724049
|
9,162 TEU | 2016 |
7.0
|
B |
| 853 |
OOCL LUXEMBOURG
IMO 9417270
|
8,063 TEU | 2006 |
7.0
|
B |
| 856 |
AL SAFAT
IMO 9349497
|
6,435 TEU | 2008 |
7.0
|
B |
| 855 |
EVER LENIENT
IMO 9604146
|
8,452 TEU | 2014 |
7.0
|
B |
| 854 |
KOTA KAMIL
IMO 9307413
|
3,081 TEU | 2006 |
7.0
|
B |
| 857 |
CHENNAI EXPRESS
IMO 9306158
|
6,539 TEU | 2006 |
7.0
|
B |
| 858 |
MSC MAEVA
IMO 9289128
|
8,089 TEU | 2005 |
7.0
|
B |
| 860 |
MAERSK MAKUTU
IMO 9318319
|
4,154 TEU | 2007 |
7.0
|
B |
| 859 |
MSC VEGA
IMO 9465265
|
13,102 TEU | 2012 |
7.0
|
B |
| 861 |
MAERSK NAKURU
IMO 9356103
|
2,478 TEU | 2008 |
7.1
|
B |
| 862 |
PANDA 006
IMO 9677026
|
6,900 TEU | 2012 |
7.1
|
B |
| 864 |
ONE TRITON
IMO 9356713
|
6,661 TEU | 2008 |
7.1
|
B |
| 863 |
AL MANAMAH
IMO 9349538
|
6,435 TEU | 2008 |
7.1
|
B |
| 865 |
NHAVA SHEVA EXPRESS
IMO 9406738
|
9,954 TEU | 2011 |
7.1
|
B |
| 866 |
NYK VESTA
IMO 9312808
|
9,012 TEU | 2007 |
7.1
|
B |
| 867 |
MAERSK STADELHORN
IMO 9726671
|
10,000 TEU | 2013 |
7.1
|
C |
| 868 |
MSC SANDRA
IMO 9203954
|
4,315 TEU | 2000 |
7.1
|
C |
| 869 |
MSC PALAK
IMO 9735206
|
9,408 TEU | 2016 |
7.1
|
C |
| 870 |
MSC AJACCIO
IMO 9605267
|
9,403 TEU | 2014 |
7.1
|
C |
| 874 |
HAIPHONG EXPRESS
IMO 9778129
|
10,100 TEU | 2018 |
7.1
|
C |
| 873 |
MSC MUNDRA VIII
IMO 9294989
|
8,814 TEU | 2005 |
7.1
|
C |
| 872 |
MUNDRA EXPRESS
IMO 9408865
|
9,954 TEU | 2011 |
7.1
|
C |
| 871 |
MSC TIANPING
IMO 9305489
|
8,533 TEU | 2006 |
7.1
|
C |
| 875 |
MEDITERRANEAN EXPRESS
IMO 9622019
|
4,800 TEU | 2014 |
7.1
|
C |
| 876 |
JOLLY BIANCO
IMO 9320427
|
6,336 TEU | 2006 |
7.1
|
C |
| 878 |
OOCL EUROPE
IMO 9300805
|
8,063 TEU | 2004 |
7.1
|
C |
| 877 |
JOLLY VERDE
IMO 9320441
|
6,336 TEU | 2007 |
7.1
|
C |
| 880 |
MSC AMALFI
IMO 9605279
|
9,403 TEU | 2014 |
7.1
|
C |
| 879 |
MED BEYKOZ
IMO 9064748
|
2,480 TEU | 1994 |
7.1
|
C |
| 881 |
MSC SHANNON III
IMO 8913423
|
3,005 TEU | 1991 |
7.2
|
C |
| 882 |
MAERSK PANGANI
IMO 9786097
|
5,300 TEU | 2021 |
7.2
|
C |
| 884 |
MSC BUSAN
IMO 9289087
|
8,089 TEU | 2005 |
7.2
|
C |
| 883 |
CMA CGM JEAN GABRIEL
IMO 9729128
|
10,926 TEU | 2018 |
7.2
|
C |
| 885 |
MSC RANIA VIII
IMO 9309447
|
8,401 TEU | 2005 |
7.2
|
C |
| 886 |
ONE HENRY HUDSON
IMO 9302176
|
8,212 TEU | 2008 |
7.2
|
C |
| 889 |
MSC DARIEN
IMO 9243394
|
8,384 TEU | 2003 |
7.2
|
C |
| 888 |
NYK VIRGO
IMO 9312810
|
9,012 TEU | 2007 |
7.2
|
C |
| 887 |
BRIGHTON
IMO 9332846
|
6,350 TEU | 2008 |
7.2
|
C |
| 890 |
CATHERINE C
IMO 9969998
|
7,200 TEU | 2024 |
7.2
|
C |
| 892 |
COSCO ANTWERP
IMO 9246396
|
5,618 TEU | 2001 |
7.2
|
C |
| 891 |
MSC ANZU
IMO 9710426
|
8,800 TEU | 2015 |
7.2
|
C |
| 894 |
AGIOS DIMITRIOS
IMO 9349605
|
6,572 TEU | 2011 |
7.2
|
C |
| 893 |
ARGUS
IMO 9262716
|
6,492 TEU | 2004 |
7.2
|
C |
| 895 |
MERKUR OCEAN
IMO 9620619
|
3,868 TEU | 2013 |
7.2
|
C |
| 898 |
MSC ANCHORAGE
IMO 9619440
|
8,762 TEU | 2013 |
7.2
|
C |
| 897 |
MSC ROMANE
IMO 9745653
|
9,408 TEU | 2017 |
7.2
|
C |
| 896 |
ONE HANNOVER
IMO 9302138
|
8,212 TEU | 2006 |
7.2
|
C |
| 900 |
ONE OLYMPUS
IMO 9312987
|
8,628 TEU | 2008 |
7.2
|
C |
| 899 |
MSC PAMELA
IMO 9290531
|
9,178 TEU | 2005 |
7.2
|
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 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.