Rotor sails (per unit) retrofit
vendor claim — not yet independently measuredRotating cylinders (Flettner rotors) that generate thrust from wind via the Magnus effect. Savings depend entirely on the wind resource along the routes sailed — no flat percentage is honest.
route-dependent
CO₂ emissions reduction — needs a route wind-resource score, not modelled as a flat number
€1,500k–3,500k
indicative capex band (vendor/literature prior)
5–15 days
no drydock needed
4,734
eligible vessels in our database
Which ships it suits
- Segments: Bulk carrier, Oil tanker, Chemical tanker, Vehicle carrier, General cargo ship
- Size: from 10,000 DWT
- Remaining service life: at least 8 years (payback must fit inside it)
- Service speed: up to ~15 kn — the device underdelivers on faster, finer hulls
Addressable opportunity (CII band D/E fleet)
852
D/E vessels eligible for this measure
€1,278–2,982M
installed-base capex range
0.24–0.95 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.
← Emissions & Retrofit Radar
· Segment radars:
Bulk Carrier, Oil Tanker, Chemical Tanker, General Cargo, Vehicle Carrier