A once popular proof for the globe model was that when boats sail away, they appear to disappear bottom first. On a flat earth we would continue to see the boat across level water.
If they had ONLY taken perspective and atmospherics into account they would realize that the objects are STILL there but are too far away for our vision.
With the help of a modern zoom camera, binoculars or a telescope, we can bring the objects back into view.
When looking from point A to point B, you’ll have to equate for inferior/superior mirage, perspective, and atmospheric effects.
Boats Over The Curve 100% DEBUNKED Flat Earth Confirmed
The crazy Nikon P900 has been busting balls since 2015
Ships do NOT go over any curve!