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by carlosjobim 709 days ago
The minimum distance should be the planet's circumference.
2 comments

Good news, the Earth's circumference is around 40,000km, and the actual distances sailed by each of the competitors in the most recent Vendee Globe were all around 50-51,000km. So they all exceed your requirement.
The trail should also look pleasing to the eye. So I'll have to invent a new arbitrary rule.
Why is that? It seems as arbitrary as circumnavigating a rotational axis and returning home.