Shaft generator / PTO retrofit
vendor claim — not yet independently measuredA generator on the main shaft (PTO) producing electricity from the efficient main engine instead of the auxiliary diesels. Saves auxiliary fuel and maintenance; negative running-cost delta reflects displaced aux-engine operation.
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
- Size: from 20,000 DWT
- Remaining service life: at least 8 years (payback must fit inside it)
Addressable opportunity (CII band D/E fleet)
Eligible vessels — worst CII band first
Yards with demonstrated capability
Derived from shipyard-visit evidence: yards whose visiting vessels subsequently showed the relevant equipment in class records. Source marked per row; yards can additionally claim capabilities via their profile.
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.