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submitted 3 days ago by schnurrito@discuss.tchncs.de to c/xkcd@lemmy.world

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The real key was inventing the windmill-powered winch.

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[–] HappycamperNZ@lemmy.world 2 points 8 hours ago

Similar thing - aparent wind shifts the wind direction forward. As such, how close a boat can sail to the wind decreases as the boat speeds up.