Originally Posted by JonEisberg
Uhhh, when the electrons cease flowing to/within whatever device is displaying your electronic charts, perhaps?
It HAS been known to happen, after all... :-)
When paper charts get wet they tend not to work well either.
That's been known to happen as well. Maybe we just plan for these very rare occurrences in case they do happen. Spare battery or a charging source in your example would seem to cover it.
I guess I was thinking you meant paper charts had some benefit other than just being paper. IDK.