I have MapTrax
http://www.maptrax.com/ on my iPaq loaded with WACs, VNCs and VTCs as the Map Coverage for my GRT and Avmap have only Aeronautical Chart Data and in the Aus. Outback there is next to no detail.
You cannot flight plan with MapTrax, so I still use the GRT for Nav. but the iPaq has its' own GPS and displays the WAC beneath the Aircraft and auotloads the most detailed of the charts for the area.
With a 256MB Flash Card I can store all the WACs for Australia and it relieves me of unfolding WACs in the cockpit.
I bought the iPaq and hardware from
http://www.craggyaero.com/
Pete.
