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by hollerith 462 days ago
>Regardless, if you’re building a long range missile, you need some ability for it to navigate. If you’re not using GPS, then what would you use instead?

US ICBMs and submarine-launched ballistic missiles use a combination of inertial and celestial navigation: in space of course there are no clouds to obscure the stars:

https://en.wikipedia.org/wiki/Celestial_navigation#:~:text=I...