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We already knew that GPS could be tricked into location drift. I didn’t realize US munitions were depending solely on it for navigation still.
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Glancing through the munitions in the article, HIMARS were originally developed and deployed in the 90s, not sure if they have a backup to GPS.
Thr Excalibur system mentioned does have an inertial guidance system to fall back on but I would assume it would lose some precision that GPS would afford.
