Anyone trying to navigate on a flat earth as if it was a globe will end up in the wrong place. Or the opposite - navigate on a globe pretending it was flat. Getting it wrong will get you lost!
This used to be my assumption as well.
It turns out this is not as clear cut a case for one or the other model as you'd think. For starters, both globe and flat earth models are essentially the same for the entire northern hemisphere and magnetic north pole. They also use the same system of East and West directionality. It is really only going South where things get very different between models. The models begin to gradually diverge as you go south of the equator (the globe shrinking inwards into a pole, and the flat-earth expanding outwards into the edges of a disk... and then they only become starkly different in the southern latitudes, which is mostly the southern ocean and antarctica.
The region of the earth south of 60 degrees lattitude (red line) is basically one big military restriction zone. There are guided tours to one small area, and a few other military/research bases. This is the region that would make or break each model, (either a pole on a globe earth, or an outer edge of a flat earth, but curiously it is the one region of the world where public access is so heavily restricted.
Plane flights do not cross over this region, they almost always stay north of it. Occasionally a flight will come alongside an edge of it and then immediately turn back north. Globe believers hinge their model on the fact that a small handful of flights in the south appear to take shorter flight lengths around the world than would be possible on a flat earth, but are putting a lot of faith in the exact routes and speeds those pilots are making.
Historically, there appears to have been a lot of trouble mapping the coordinates of this area, even by expert navigators. Even the original plotting of GPS systems had to use constant longitude corrections to conform the result to a globe model.
Globe believers will point to things like yacht races around this area, but they usually take inordinate lengths of time and irregular routes.
The whole thing is a fascinating subject to delve into, and you will likely realize you're really not quite as sure as you thought you were about things.
The evidence that the earth is a globe is overwhelming.
You would think so.... turns out not to be the case.
Did God create a real world? Or an illusion?
This is a great question.
Would God create a world in which everything we perceived was an illusion? Where the sun moon and stars seemed to be centered around us on an earth at rest, but really that was a big illusion and we're hurdling half a million miles through space. Was God unable to create a cosmos that existed as it appeared to men?
And God would not deceive us into believing we lived on a globe, right?
But in the Bible, God does in fact allow the nations to be deceived by someone else, specifically approaching the end of the age.
What has been a greater engine for rejection of Christianity than the myth of scientific enlightenment (i.e. Copernicanism, etc.) ? It is universally celebrated as the time in history where the wisdom of men gained superiority over the revelation of scripture, and we began to trust Science for the true nature of our universe and our origins, rather than dark age ancient superstition.
Just something to think about.