"G. Sylvester" wrote in message
m...

negative.

AIM 1-1-21. Global Positioning System (GPS)
Part e. Section 1. GPS Navigation......Visual Flight Rules (VFR)
and hand-held GPS systems are not authorized for IFR navigation....
during IFR operations they may be considered only an aid to situational
awareness.


The AIM is not regulatory and there is no requirement that limits usage to
authorized units.



and in the case of lost comms, do you just dead reckon?


Why would I switch from GPS to dead reckoning if I lost comms?



Do you base your life off of something completely untested?


Are tested units failure-proof?



Note, all of this
I assume your talking about flying to a point 300 nm away where
all nav systems (other than IRU's, VOR-DME FMS, etc. that large
aircraft have) do not work at such long distance.


Where is this place where all nav systems (other than IRU's, VOR-DME FMS,
etc. that large aircraft have) do not work?