> because automatically restarting a transmitter in an unmanned tunnel is not an acceptable failure mode
Why?
Also, surely they don't mean unmanned, who is listening to the AM emergency broadcast then?
Why?
Also, surely they don't mean unmanned, who is listening to the AM emergency broadcast then?
I think a reasonable approach would be to have a redundant system, that gets activated if failure occurs in the first, and blasts a full alarm message to "abandon the tunnels, emergency system has failed!" type message.