"Bruce E. Haddad" wrote in message
...

The following is from
http://www.airweb.faa.gov/Regulatory...B?OpenDocument
(sorry for the long link).


All I get is "The page cannot be displayed".



It's the GPS that's certified for IFR
operations. As such - the regulations controlling pilots simply states
that the equipment must be IFR certified.


What FAR states that?



Remember - the GPS will never show where you are.


Really? Where am I when the GPS says I'm motionless on the ramp?



It will only show where
you WERE. How far behind you the GPS is can be problematic. Each GPS
receiver has it's own formula for choosing satellites from the visible
part of the constellation. Each of the satellites have errors (not the
induced errors - just such errors as drift in the constellation, signal
degradation due to atmospheric interference, etc.). A lot of things need
to be engineered into the GPS to make it reliable enough for me to trust
it for approaches.


Do you trust ADF or NDB enough for approaches?