EC-1’s require the computer for protection, otherwise your safety is entrusted to the Train Dispatcher’s memory…
But the one to worry about is the ones mother nature can send from the sun. (CME)
And a roll of butcher’s paper for a makeshift trainsheet…
Tough to find a butcher, even harder to find one that uses paper and not plastic film.
Bingo! Many communication satellites could be put out of action.
If the outage was bad enough, I was thinking that a lot more of a different paper roll would be required.
We’re fortunate that SpaceX and others may be reasonably priced enough to make a ‘hot standby’ launcher and satellite constellation possible.
I know that some vacuum tubes are still made in Germany and Russia. Anyone know if nuvistors are still available?
[:D]