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I think the implication was "without someone else driving / piloting".

I think the counter point is that with gps, radar & autopilot... Yachting is there today, to a degree.

You may not need to physically hold the wheel but someone does have to be awake on watch at all times, even with radar & AIS.

I don't care how many fancy screens you have, one person on watch with a pair of binoculars should have spotted a bloody oil tanker.

The folks who do round the world solo races might beg to differ