Refrigerated Cargo 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
28 at D/E124 rated vessels · 17 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 | 29 | 5–10% | €400k–1,200k | — | vendor claim |
| Turbocharger cut-out | 21 | 1–3% | €80k–250k | — | vendor claim |
| Shaft generator / PTO | 5 | 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 |
|---|---|---|---|
| CHIKUMA · <25k | E | 13y | 2026 |
| KENTA MARU · <25k | E | 8y | 2026 |
| BALTIC SPIRIT · <25k | E | 8y | 2026 |
| ATLANTIC LADY · <25k | E | 40y | 2026 |
| COOL MAGNUS · <25k | E | 26y | 2026 |
| # | Vessel | Size (DWT) | Built | Carbon intensity — AER (g CO₂/dwt·nm) | Grade |
|---|---|---|---|---|---|
| 101 |
CROWN OPAL
IMO 9128063
|
10,316 | 1997 |
26.1
|
E |
| 102 |
LUZON STRAIT
IMO 9204960
|
15,867 | 2002 |
26.2
|
E |
| 103 |
DOLE ASIA
IMO 9046526
|
10,288 | 1994 |
26.4
|
E |
| 104 |
SIERRA QUEEN
IMO 9127928
|
7,948 | 1996 |
26.5
|
E |
| 105 |
DOLE AFRICA
IMO 9046538
|
10,288 | 1994 |
26.5
|
E |
| 106 |
CS SERVICE
IMO 9438482
|
13,073 | 2008 |
26.9
|
E |
| 107 |
CROWN JADE
IMO 9128051
|
10,342 | 1997 |
27.3
|
E |
| 108 |
GREENSEA BERMEO
IMO 9238703
|
7,614 | 2001 |
28.9
|
E |
| 109 |
FRIO CHIKUMA
IMO 9184536
|
8,097 | 1998 |
29.0
|
E |
| 110 |
SIERRA LARA
IMO 9120205
|
5,970 | 1996 |
29.2
|
E |
| 111 |
GREEN CHILE
IMO 8912156
|
8,647 | 1992 |
29.7
|
E |
| 112 |
SAVANNA WIND
IMO 9791286
|
5,102 | 2020 |
30.4
|
E |
| 113 |
NOVIY SVET
IMO 8509557
|
6,232 | 1990 |
40.7
|
E |
| 114 |
ARCTIC SPIRIT
IMO 8907204
|
6,807 | 1991 |
46.0
|
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.