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  • MarkFromNJ commented on Xuthal's instructable Survive an EMP Apocolypse 2 years ago
    Survive an EMP Apocolypse

    gps receiver is a waste of space. If the power grid and other electrical / electronic devices are down, evejn if the satellites survive there will be no one there to continually adjust for physical satellite drift and clock drift. Without that constant management the gps system will be uselessly inaccurate within a few days.

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