Originally Posted by Fly-by-Desire
Why is a mobile phone not a timepiece?
Used to be that the requirement for legal timekeeping in-flight was for an hour and minute hand, with sweep-hand indicating seconds. Sorry, no ref available -it was a while ago
Additionally when I was studying all this (and I suspect when the rules/regs were written) it was all
pre-cellphones! That may have some bearing also
