Single-handing overnight from Collingwood to Meaford, 0200 hours. Battery voltage dropping slowly. I had my hands on the helm and could not leave to check the engine compartment.
I used d3kOS voice: “Battery voltage is dropping slowly at 1800 RPM, alternator light is off, no alarms. What are the most likely causes?”
The AI gave three possibilities: belt slipping, corroded alternator terminal, failing diode. I increased RPM slightly — heard a faint squeal. Belt was glazed with 1mm of slop. Replaced at the dock.
I got actionable guidance without leaving the helm at night.
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