"Ray Andraka" wrote in message ...
I think he was asking what would kill your comm and transponder but not your nav.
likelihood is that it would be a whole electrical system failure, in which case you'd
have to depend on your handheld electronics. You do have spare batteries for them
when you fly, don't you?

Yep, I carry a whole brick of AA's. Use them for everything from the ANR headsets
to the flashlights.