"Doug" wrote in news:1126227944.916583.168690
@z14g2000cwz.googlegroups.com:

If you rely on GPS in IMC you need TWO GPS's (or backup your location
with VOR/DME). And it is best if they are of different manufacturers. A
handheld to backup the panel mount is sufficient.

I don't agree. We regularly fly in IMC using one GPS, and it's approved
under Part 135. We do have 2 VORs installed, but they're worthless a
couple of hundred miles from the nearest transmitter. Before GPS, we flew
approaches using a single LORAN.

--
Regards,

Stan

"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety." B. Franklin