"gps based upon a flat stationary plane"

Nonsense. I worked in GPS at Trimble Navigation. GPS uses a complex 3D geometry. Not a trace of flat earth in it. GPS is based on satellites rotating around a spherical planet and sending signals through a 3D space. Ground receivers compute their position based on data from a 3D space; it's all 3D geometry plus a little special relativity to adjust for time changes due to motion.

There are maybe three kinds of flat earthers, in descending order of true stupidity:

1. dumb fuck trolls
2. people lacking any education
3. dumb fuck ignorant trolltards.
4. Joe Biden