Verified Defense Pro
Actually it's quite easy and the Russians have already proven that they can disrupt and spoof GPS. All you have to do is interfere with the signals and corrupt the ephemerals data within them, or render the satellites inoperable. The Russians don't need GPS themselves because they have GLOSNASS and the PRC has it's own SATNAV system.How?
Its pretty much impossible, not to mention they will never do it in the first place.
I don't doubt any enemy of any western army will want to degrade navigation, at least to make it difficult for guidance systems on cruise missiles. So they will target GPS in one way or another. But it's very hard.
Cell phone navigation on the other hand no point to degrade, soldiers won't use it, bcs it's dangerous and may give to enemy unit location.