Have you ever read either TSO-c146a or TSO-c129? One of the requirements
specifies that the database in an IFR-certified box adhere to a higher
tolerance of corruptibility. Are you sure the VFR portable's database was
built to the same specifications? If not--higher risk.

I can go on and list each item-by-item but you seem to be literate so you
can read the TSOs at your leisure. Bottom line is as I stated in my previous
post that you don't personally believe the requirements outlined in these
documents reduce risk in any way, shape, or form.

If that's the case, I'm glad you don't help the FAA develop these standards.

Marco Leon



"Steven P. McNicoll" wrote in message
k.net...

"Ron Lee" wrote in message
...

Steven, when then are handheld GPS units not allowed to be used for
IFR navigation?


There is no specific prohibition on them.



You can do as you wish. Darwinism works well in aviation as in other
endeavors.


That sounds like you do believe there is a risk in the use of a handheld
GPS
for IFR enroute navigation in US controlled airspace. Please identify
that
risk.