What will the yacht look like when it leaves the horizon?

The earth is round, and the horizon is far enough out in the sea for you to see it clearly. So, a yacht or a ship does not disappear instantly – namely, they go beyond the horizon, just as they would go over the mountain, descending from it. First, the hull of the ship is hidden behind the thickness of the “water mountain”, then the masts, and the last flag disappears.



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