You can make the ship reappear when it disappears behind the water. It's simply going out of your perspective.  Once the ship is gone from your sight "perspective" if you use binoculars you can see the ship again.

I have seen no proof of what I'm being called out for,  Just jabs and ridicule.  If it's so ridiculous please help me out and give me definitive proof of a globular earth.  Along with an experiment I can do myself to prove it.