>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 IC

>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=Intercontinental%20ballistic%20missiles%20use%20celestial,behind%20this%20seemingly%20archaic%20technique. https://en.wikipedia.org/wiki/Celestial_navigation#:~:text=I...