And this is where i fail bigly. I do not remember names, so i cannot provide search terms for these events.
It is that, when you take the globe model, and you are at a certain latitude, then the distance between longitudes should be X, but, south of the equator this doesn't hold true.
When you measure distance across land from one degree of longitude to another
When you try to sail around Antarcitica
When you try to sail around a known land mass (the bottom of Africa)
You find that it is not X distance, it is 2X or as you go further south it is 12X
How do you know this, though? I do sympathize with not having sources at your fingertips. I read a lot, online and off, so having info rattling around between my ears with no easy hyperlink for a source does happen. But extraordinary claims require extraordinary evidence. Sure, in the end, we're both working from hearsay when it comes to distances and travel, but the preponderance of evidence I have seen which people support with data (whether dubious or not) does not match your unsubstantiated claims.