"whether the Navy should be abandoning low-tech backup solutions"
Might the Admiralty need to have a general session and watch Tomorrow Never Dies ?
Or should we just ask them what they will do in case of an EMP ? Supposing they know what that is, of course. And supposing that those signal lights are without electronics, so as to be impervious to . . . ah, but motorized signal lights operated by tablets.
Ok, forget it.