this post was submitted on 29 Aug 2026
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Navigation with a suitcase sized device that doesn't rely on hundreds of thousands of satellites? Honestly this sounds great.
Wait until you hear about compasses and maps!
In the middle of the ocean? Wouldn't that require a sextant, night time, and a lot of expertise?
And an extremely accurate clock (depending on how accurate you want your location to be).
https://en.wikipedia.org/wiki/Marine_chronometer
Wait until you hear about inertial navigation!
All you really need is to see the Jovian eclipses.