SYB_DC
Winger
See, the problem is that's just not factually true. There are latitudes in the southern hemisphere at which there is no land no matter how far east or west you sail or fly.It's already in the trough.
That's what I'm trying to tell you.
Why would people know this would be the potential Earth when they think they're navigating on a globe that's spinning?
Think about it.
You'll hit any land that's in the way of your navigation.
If you go east or west you're going around a circle.
If you go north you hit land from any point you start from going north.
South is the opposite. You will hit land and ice barriers well before you get to any real land gradient either way, north and south as people see it on a compass.
There's only one way you can be able to "go around a circle" of the same distance in the northern hemisphere and the southern hemisphere by going east or west at a constant latitude. I'll leave you to contemplate what that is.