Interesting discussion.
When I researched the game, I found that the devs measured E/W, then N/S in yards from 0d north and 0d west. They also used 2000 yds as a Nautical Mile. Thus the 120000 figure for a degree of latitude or longitude at the equator. Since an actual nautical mile is 6076 feet this might explain some of the errors vs real life in long distance navigation.
By moving first along the equator then N/S, you can translate your position to a flat map, it would create problems measuring E/W at places other than the equator, though.
Mike 6sj7gt
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