The ONLY world air chart I personally am ever likely to need is the piece abutting the northern edge of the state of Washington.
Unfortunately at some point I downloaded all the WACs into my 720... crowding the space (be nice to have some slack for music, text notes, etc).
I can easily enough go into the SD card on my PC and delete the WACs to free up a bit of space, but might like to know which one to include in my next update. Bet some others might want to be a bit selective about which WACs do keep updated.
Can you point me to the particular one I want? Better yet (for more general owner info) provide a list or mapping of what territory the WACs cover?
Alex