,

My dad has a GPS already, he'd like to know if there is PC map
software which is aviation oriented, and/or supports Jeppesen data
rather then buy a new aviation specific GPS?


The one-step answer is: Look into PocketFMS, www.pocketfms.com

Some thoughts, though: Is it really practical for him to have a PC in
the cockpit? Consider space, display visibility in bright sunlight and
battery running time.

--
Thomas Borchert (EDDH)