"Sam Spade" wrote in message
news:Kt74g.174361$bm6.134909@fed1read04...

They are as primary nav for IFR.


Cite the applicable regulation.



Part 23 (for the type of aircraft we're talking about). A good avionics
shop can direct you to related ACs.


We're not talking about a type of aircraft, we're talking about use of
handheld GPS. Part 23 is not applicable.



So, it does not satisfy Part 23, which requires that the avionics
manufacturer provide equipment (in this case) that is appropriate for IFR
operations.


Part 23 prescribes airworthiness standards for the issue of type
certificates, and changes to those certificates, for airplanes in the
normal, utility, acrobatic, and commuter categories. It has nothing to do
with uninstalled devices such as handheld GPS.

You can examine Part 23 he http://makeashorterlink.com/?D2FD2580D



Handhelds are typically not installed. But, once they are connected to an
external antenna and/or ship's power supply they are usually considered to
be installed.


Only by the irrational.