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> The demo on the show floor was also using eLoran to distribute time from a site in Nevada to the transmitter facility on Black Mountain outside Vegas, showing a way to be fully GPS-independent (though the current eLoran timing was sourced from GPS).

There's been a consistent call by many people that there needs to be a diversity of options for navigation and timing:

* https://rntfnd.org/2025/02/04/pnt-gps-critical-issue-for-new...

China has GNSS (BeiDou, plus plans for LEO), plus terrestrial navigation (eLoran), plus a fibre-based network for accurate timing:

* https://rntfnd.org/2024/10/03/china-completes-national-elora...

* https://rntfnd.org/2024/03/01/patton-read-their-book-chinas-...

* https://rntfnd.org/2024/11/29/china-announces-plan-to-furthe...

Russia has a Loran-equivalent:

* https://en.wikipedia.org/wiki/CHAYKA




Well... and there's the electricity grid which can be used for timing needs accurate enough to a single second, and in Europe there's DCF77 [1] which can not just be used as a 2*10^-12 seconds-accurate timing standard but also a frequency standard.

[1] https://de.wikipedia.org/wiki/DCF77




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