Yes I have been on lots of planes ✈️ The windows are curved Which is why it gives you the fish eye lense And yes Ive been deep sea fishing tons of times and on cruise ships…. 🛳️ When a boat disappears over the horizon it’s not because of the curvature If you get a camera and zoom in it will reappear Your eyes can only see so far The sea is level That’s why it’s called sea level Water does not curve I don’t think the earth is flat I know it is…