Grin,
I had to rethink that a bit, I can't yet work it out, yep now I can, i imagined two people looking at the sun as it moves, one person in the northern hemisphere and one in the southern hemisphere, both looking to the equator.
Both see the same sun, one sees it move from his left to his right, and the other sees it move from his right to his left, but in both cases it is east to west. Got it !.
Technically though, there must be a place where east meets west surely ?. there should be a line where if you go a bit each way, you are at the point where it is east and west together sort of, like a boundary line ?.
Sailing is cool, I want to make a electric powered ketch rigged catamaran, and instead of sails, two free standing masts with many small wind turbines, powering twin imiev like motors.
Like sailing, without the flapping or rushing to furl or reef, but still figureing out how to reduce windage on the turbines, thinking self feathering blades, or a mast track system where they come down and stow below.
Oh and the hulls on a suspension system, to stop the rolling, sigh. love sailing but I get seasick on slow waves.
Maybe a submarine, solar powered ?