There used to be a prevailing attitude that if you were using a "glass panel",
you'd still need backup "steam" gauges for basic stuff like compass, airspeed,
and altimeter. I've done some research on this, and see no requirement
mandating the backups, so maybe it's just prudence. I have an MG
Mark; Because GPS is based on satellites, how would the signal in a local area
be shut down? Broadcast an interfering signal? FARs don't require backup
instruments, and experimentals can use any form of the basic VFR instruments
they want.(airspeed, altimeter, oil pressure, RPM, fuel quantity in
At 03:24 PM 4/14/2013, you wrote:
> There used to be a prevailing attitude that if you were using a
> "glass panel", you'd still need backup "steam" gauges for basic
> stuff like compass, airspeed, and altimeter.
>Mark Langford
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