I don't believe ICBM's are using GPS. They're programmed like they always have been and follow a very predictable path and don't change course (unlike hypersoni

I don't believe ICBM's are using GPS. They're programmed like they always have been and follow a very predictable path and don't change course (unlike hypersonic missiles). It's the "smart weapons" that are usually plane/ship dropped/launched that are gps guided as they are smaller munitions that have a much smaller blast radius and need to be more precise to be effective (as opposed to just carpet bombing the whole area). Those are "close" range weapons. You don't need to be very precise with an ICBM to obliterate the target, as it's usually city-sized. A mile off here or there will still destroy the target. Planes can and do still fly without GPS. There also haven't been too many wars involving the poles as basically no one lives there except science teams and no one wants the "land" as you can't do anything economically practical with it. Most of our ICBM's are still ancient Minuteman III's which were manufactured in the 1960's (my dad launched one in 68 out of Minot AFB, ND) and recently updated in 2015 to extend their useful life.