yes so to fix that you have hexes for land and spaces for sea, but the problem with that is the issue of national borders because pieces of both sides would technically be able to co-exist in the same hex.
That is the only reason why GMT makes ‘point to point’ movement maps… because they hate ‘area movement maps’
They hate them because its not a solution THEY came up with, but Larry Harris would take the credit because any area movement map that has been offered since 1980 owes its existence to larry.
Additionally, GMT are lazy sods because they have tons of photoshopped maps they didn’t even make and simply draw boxes on these maps and finish in a days work. Its totally disengenious of them among other things.
The other poster is correct about the ocean because the world is round and it should be harder to travel along the center, then at the ends. Hexes standardizes movement but does not offer a realistic solution to the earths round surface.