Turbocharger cut-out retrofit
vendor claim — not yet independently measuredDeactivating one turbocharger at slow-steaming loads so the remaining unit(s) run at better efficiency. Suits two-stroke engines that spend most time well below design load.
1–3%
CO₂ emissions reduction
€80k–250k
indicative capex band (vendor/literature prior)
2–5 days
no drydock needed
6,767
eligible vessels in our database
Which ships it suits
- Segments: Bulk carrier, Chemical tanker, Combination carrier, Container ship, Gas carrier, General cargo ship, LNG carrier, Oil tanker, Refrigerated cargo carrier, Ro-ro ship, Vehicle carrier
- Remaining service life: at least 5 years (payback must fit inside it)
- Engine: two-stroke main engines only
- Service speed: up to ~14 kn — the device underdelivers on faster, finer hulls
Addressable opportunity (CII band D/E fleet)
1,453
D/E vessels eligible for this measure
€116–363M
installed-base capex range
0.18–0.53 Mt
annual CO₂ reduction (claimed range × reported emissions)
Eligible vessels — worst CII band first
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Measured real-world outcomes
The reduction range above is a vendor claim. We continuously detect completed retrofits in shipyard-visit, equipment and EU MRV emissions data and measure the actual AER change. Measured results are published per measure once at least 30 controlled observations exist — until then, treat vendor ranges as ceilings: real-world delivery is consistently at or below the low end.