"Jim Carter" wrote in message
. com...

So by installing a yoke mounting clamp permanently in the a/c (and
making the appropriate paper work entries), the handheld GPS becomes
usable (if certified) for IFR enroute and maybe approach?


No, by doing the appropriate paperwork for the permanently installed yoke
mounting clamp that installation is legal. The handheld GPS was already
usable for IFR enroute use in US controlled airspace.