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 · 551 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 |
|---|---|---|---|---|---|
| 2051 |
ILSE D
IMO 9514755
|
1,036 TEU | 2010 |
21.9
|
E |
| 2052 |
KRISTIN SCHEPERS
IMO 9404089
|
803 TEU | 2008 |
21.9
|
E |
| 2053 |
SONATA
IMO 9316103
|
1,118 TEU | 2006 |
21.9
|
E |
| 2054 |
X-PRESS ELBE
IMO 9483669
|
1,036 TEU | 2010 |
21.9
|
E |
| 2055 |
BG EMERALD
IMO 9803704
|
1,004 TEU | 2018 |
22.0
|
E |
| 2056 |
ELBSUN
IMO 9429261
|
877 TEU | 2012 |
22.0
|
E |
| 2057 |
MONTE BRASIL
IMO 9083055
|
636 TEU | 1994 |
22.0
|
E |
| 2058 |
ARNARFELL
IMO 9306005
|
909 TEU | 2005 |
22.0
|
E |
| 2059 |
WILHELM
IMO 9376050
|
868 TEU | 2008 |
22.0
|
E |
| 2060 |
BF PERCH
IMO 9437218
|
990 TEU | 2007 |
22.1
|
E |
| 2061 |
CT PACHUCA
IMO 9344253
|
750 TEU | 2005 |
22.1
|
E |
| 2062 |
WEC VERMEER
IMO 9237371
|
868 TEU | 2001 |
22.1
|
E |
| 2063 |
AVILA
IMO 9295529
|
887 TEU | 2007 |
22.1
|
E |
| 2064 |
MARTINE A
IMO 9020340
|
1,139 TEU | 1993 |
22.1
|
E |
| 2065 |
ELBFEEDER
IMO 9388522
|
974 TEU | 2008 |
22.1
|
E |
| 2066 |
KATHERINE BORCHARD
IMO 9246530
|
862 TEU | 2004 |
22.1
|
E |
| 2067 |
MASTERY D
IMO 9301201
|
917 TEU | 2006 |
22.2
|
E |
| 2068 |
PROS HOPE
IMO 9319557
|
1,100 TEU | 2005 |
22.2
|
E |
| 2069 |
LINDA
IMO 9354325
|
907 TEU | 2007 |
22.2
|
E |
| 2070 |
SPICA J
IMO 9355460
|
962 TEU | 2007 |
22.3
|
E |
| 2071 |
MONTE DA GUIA
IMO 9123788
|
636 TEU | 1995 |
22.4
|
E |
| 2072 |
EDITH
IMO 9328625
|
750 TEU | 2005 |
22.4
|
E |
| 2073 |
WEC VAN EYCK
IMO 9365984
|
809 TEU | 2009 |
22.5
|
E |
| 2074 |
ERASMUS HOPE
IMO 9396634
|
1,335 TEU | 2008 |
22.6
|
E |
| 2075 |
MEDKON LUNA
IMO 9341976
|
698 TEU | 2007 |
22.6
|
E |
| 2076 |
PEGASUS J
IMO 9355434
|
962 TEU | 2006 |
22.6
|
E |
| 2077 |
BJORG
IMO 9231834
|
868 TEU | 2001 |
22.6
|
E |
| 2078 |
ZIM NEW ZEALAND
IMO 9366471
|
1,155 TEU | 2007 |
22.7
|
E |
| 2079 |
PICTOR
IMO 9371426
|
925 TEU | 2009 |
22.7
|
E |
| 2080 |
BF CARP
IMO 9437256
|
990 TEU | 2009 |
22.9
|
E |
| 2081 |
AMELIE BORCHARD
IMO 9242560
|
868 TEU | 2002 |
22.9
|
E |
| 2082 |
AQUARIUS
IMO 9328651
|
707 TEU | 2005 |
22.9
|
E |
| 2083 |
HMO LEADER
IMO 9169811
|
650 TEU | 1997 |
22.9
|
E |
| 2084 |
SYNETOS
IMO 9347774
|
957 TEU | 2006 |
22.9
|
E |
| 2085 |
RUTH
IMO 9376036
|
868 TEU | 2008 |
23.0
|
E |
| 2086 |
CMA CGM DAKHLA
IMO 9461594
|
1,036 TEU | 2008 |
23.1
|
E |
| 2087 |
IPIOS
IMO 9359117
|
1,118 TEU | 2006 |
23.1
|
E |
| 2088 |
CONTSHIP ONO
IMO 9324978
|
1,080 TEU | 2007 |
23.1
|
E |
| 2089 |
FINE SCHEPERS
IMO 9323467
|
803 TEU | 2006 |
23.1
|
E |
| 2090 |
MSC LUNA F
IMO 9308625
|
916 TEU | 2006 |
23.1
|
E |
| 2091 |
MSC TALIA F
IMO 9308601
|
916 TEU | 2005 |
23.1
|
E |
| 2092 |
YERUPAJA
IMO 9412488
|
880 TEU | 2010 |
23.1
|
E |
| 2093 |
DEPE
IMO 9186405
|
658 TEU | 1998 |
23.2
|
E |
| 2094 |
PERSEUS
IMO 9129469
|
646 TEU | 1996 |
23.2
|
E |
| 2095 |
BF LETICIA
IMO 9266542
|
862 TEU | 2003 |
23.2
|
E |
| 2096 |
CARLA
IMO 9319868
|
750 TEU | 2004 |
23.4
|
E |
| 2097 |
CONTSHIP JOY
IMO 9349174
|
925 TEU | 2007 |
23.4
|
E |
| 2098 |
ZIM AUSTRALIA
IMO 9366445
|
1,155 TEU | 2007 |
23.4
|
E |
| 2099 |
EINSTEIN
IMO 9483346
|
1,000 TEU | 2012 |
23.4
|
E |
| 2100 |
MEANDI
IMO 9328039
|
803 TEU | 2006 |
23.4
|
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.