Thomas Borchert wrote:
,


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.

I agree. It's free, but there are crippling (slow) map download issues.
For US$60 you cn become a donor and get the appropriate mappack of
upgraded maps and near real time update of the avdata - well worth it.

I was buying an iPAQ HX4700 anyway so the cost was minimal. A bluetooth
GPS at about $100 and you have a pretty good aviation, high resolution
moving map system with embedded flight planning, w&B and anything else
you might want to stuff on it. The PC version also works well (but not
something I'd want in the aircraft). Try www.plamflying.com for a host
of other useful and often free aviation related software utilities.

Cheers,
kevin