No.
Meshtastic could be used, as the devices are cheap enough to be saved in EMP-proofing, but, that won't work globally.
Discussion
I'm thinking we need a hybrid of Meshtastic and Ham radio links (20, 40, 80 meter?) for unstoppable global coverage...
Could be.
Actually, for the base layer I'm pretty sure we need a fair amount of speed to maintain the timechain at an average 10 minute interval. I'm not deep enough into details yet to really specify what's necessary; just deep enough to be dangerous.😜😂
I wonder if there's any kind of data compression that could be applied to lower the bandwidth needed to maintain continuity.
Just use js8call
Never heard of it; will search, but would welcome links.🙏🏻😀
OK, found this, thanks;
Meshtastic was my first thought