It was always in sight, that's not the question (whether you can see with your human eyes or not is irrelevant). The question is about the part obscured by the curvature of the Earth, and you won't bring it back by any means.
I repeat for the umpteenth time: instead of chasing highly compressed videos on the net that were never made for this purpose, use a decent camera with zoom and go to the shore to see a distant ship. You'll never see in reality what you expect to see based on the FE hypothesis. Never.
Good grief. Of course whether it can be seen with the eye or not is relevant, because there comes a point when you cannot. And the ship disappears hull first, until the whole ship
appears to be gone. Increase the resolution and, hey presto, it was never gone at all.
The "curvature of the Earth" is your assumption, it is not shown by any disappearing ship.
There comes a point when the hull cannot be restored by a telescope, but that is not the point being made in this thread. There are other good reasons for this, without needing to invoke the claimed "curvature of the Earth."