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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.
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.
