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$\begingroup$ We have a very strict one question per post policy on this site. Please ask a single question ideally one where you're not asking us to brainstorm or build your world for you. $\endgroup$– sphenningsCommented yesterday
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2$\begingroup$ In the far field magnetic force scales with the cube of the distance rather than the square. (This is why when you pick up a fridge magnet the force drops abruptly when you pull it more than a millimeter or two from the fridge door.) $\endgroup$– AlexPCommented yesterday
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$\begingroup$ How do you get from island to island? $\endgroup$– JustAnotherUserCommented yesterday
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$\begingroup$ @JustAnotherUser By skyships, thus the navigation concern. $\endgroup$– vicky_molokhCommented yesterday
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3$\begingroup$ If they're floating in the sky, can't you just see them with your naked eyes? Navigation is tricky on the ocean because the curvature of the Earth blocks your view at more than about 10 miles. But if there were no water in the way, you could see a lot further than that. I can go outside and see a floating rock in the sky (the Moon), but I can't see China, even though it's a lot closer. $\endgroup$– Christopher WellsCommented yesterday
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