Another idea to consider:
The FE unipolar map only allows circumnavigation traveling due East or due West. FE people say navigation instruments are inaccurate enough that we can't travel in a straight line on the ocean. Why, then, is it the case that I can point exactly due East or due West to end up back where I was?
Also, what do FE people have to say if I circumnavigate the Earth near the South Pole traveling slightly above East?
Either way with a FE concept (monopole only) with the Center at the North Pole, and the circumfrance at the extreme south and the meridians centered on the North Pole like the spokes of a shell, it would work out the same on a globe as the flat earth.
If you sail 090 at 60 degrees south you end up following a parallel of latitude, and end up at 60 south after travelling 10,800 nautical miles, as the compass (if it is corrected for variation and deviation) will keep you heading east.
Apparently the same happens on a flat earth, as you constantly cross the meridians at right angles, therefore you you sail in a big circle around the circumfrance, the only difference is that you have to sail 56,548 miles to do it.
This is where I use a FE argument against them.......
In previous threads it was argued that an aircraft flying around a GE must make constant downwards adjustments to keep flying around the world which proves the earth is flat. Using the exact same argument then why does a ship not need to make constant heading adjustments away from the equator to keep sailing on a compass heading of 090? Therefore this proves the earth cannot be flat!
On the other question, of you sail on a heading of say 088 degrees, slightly north of east, on both models you will spiral towards the North Pole (or Center) until you bump into a land mass.