Yeah, the US (and others) also shutdown Loran because GPS supposedly made it 'unnecessary'. Oops: * https://www.space.com/gps-signal-jamming-explainer-russia-

Yeah, the US (and others) also shutdown Loran because GPS supposedly made it 'unnecessary'. Oops: * https://www.space.com/gps-signal-jamming-explainer-russia-ukraine-invasion https://www.space.com/gps-signal-jamming-explainer-russia-uk... * https://www.gps.gov/spectrum/jamming/ https://www.gps.gov/spectrum/jamming/ * https://gpsjam.org https://gpsjam.org * https://www.zdnet.com/article/criminals-are-using-gps-jammers-to-hijack-trucks-and-down-drones/ https://www.zdnet.com/article/criminals-are-using-gps-jammer... Perhaps folks should worry less about efficiency and more about Positioning, Navigation, and Timing (PNT) resiliency: * https://www.dhs.gov/science-and-technology/publication/resilient-pnt-reference-architecture https://www.dhs.gov/science-and-technology/publication/resil... * https://www.gps.gov/resilience/ https://www.gps.gov/resilience/