Hi Udo

Is a backup needed? My GPS Nav has worked flawlessly for the last 10
years {:))

I need help interpreting the 2006 rules regarding the above subject.
The rules do not discuss a back up flight recorder.
What options exist for a backup flight recorder that would be excepted
across the board in US contests for none team use.
Udo
PS. If you have a used GPS Nav 20 or 25 let me know.

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