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A comment on The World Economy Runs on GPS. It Needs a Backup Plan. Parent comment

Re:The World Economy Runs on GPS. It Needs a Backup Plan by azernik on Thursday July 26, 2018 @01:47AM (#17615310)
Cruise missiles combine (using Tomahawk as an example) GPS, visual terrain-matching, radar terrain-matching, and INS. Because they know INS needs those constant corrections.
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