No, GLOBAL positioning system.
You not liking that wont magically change it.
You changing it will not alter my thoughts on ground positioning stations.
I'm not changing it. And it seems nothing will alter your thoughts to accept reality rather than continually living in a fantasy.
How much of such an object should be hidden at a 30 km distance, if you are standing 2 m above the RE?
Just work out the drop of 8 inches per mile squared.
Bear that in mind that the drop would have to be he tilt because your object is not just going to sink, plumb into the sea.
Don't tell me to work it out.
Are you scared to work it out?
No. Are you?
I already did remember.
With a height of 2 m, the horizon is ~ 5 km away, leaving 25 km of distance which obscures the object leaving ~ 50 m hidden.
I did this plenty of times, the most recent being in this post:
https://www.theflatearthsociety.org/forum/index.php?topic=87127.msg2317179#msg2317179Which you seemed completely incapable of dealing with in any rational manner.
If you don't like that calculation which shows you are spouting pure BS, then explain what is wrong with it and provide your own.
But you seem terrified, because all you have are your pathetic assertions backed up by nothing.
So again, YOU DO THE MATH, YOU show how much should be hidden on a RE, and what the tilt should be.
No bold qualitative claims pulled from thin air, but actual numbers, justified through math.
While you are at it, answer the rest of the questions you keep on avoiding.
Again, If you have a tube, 1 inch in a diameter and 10 inches long, with this tube level and you looking through the tube with your eye at the midpoint of the tube's height and directly against the end of the tube, how far below the tube can an object at 1 mile distance be, in order to still be visible through the tube?
Can you see the base of a tree at 1 mile distance, if the base of the tree is 6 ft below the level of the tube?
Again, what magic prevents us from seeing the RE through a level tube?
Again, what should the tilt be (provide a number) for an object 30 km away?
How much of such an object should be hidden at a 30 km distance, if you are standing 2 m above the RE?
Which flat map on paper or map app do you use to navigate around?
Any that do the job.
So the ones based upon a globe.
Those apps incorporate earth curvature into the maps, don't they?
Nope. Not unless you mean hills and mountains and bumpy roads, etc. Do you mean this?
As they are based upon GPS, and use latitude and longitude, they most certainly do account for the curvature of Earth. Otherwise they would have no idea where you are, and no idea what the distance between 2 points is.