Again, cf. the work of Herve Riboni about how people "navigate" the "globe" successfully with current maps. In the Southern "Hemisphere" in particular they're required to make course changes based on some alleged "magnetic declination", and he demonstrates how these declinations almost perfectly represent the deviation of the globe model from the FE. So, this man participated in sailing races around the world and is rather expert in the matter. He also goes out into the field to demonstrate deviations in the real world from what the current maps allege. He also points out how timezones are compressed or even eliminated in some Northern latitudes compared to their Southern equivalent when they should be identical, e.g. where 30 degrees North latitude should be identical to 30 degrees South on a ball ... but they're not.