Box two. Use it! It may just be useful one day
What if you don't have box 2
Still I go back to my point that if you are talking to a LARS provider, and are high above the ATZ (say 4000) then you're better off remaining with the LARS provider (on a Traffic service that is) than switching to a non radar unit.
Good point. Anyway, you shouldn't just leave a LARS service, you've got to "sign out", so to speak. So should you:
- sign out to call each and every airfield whose ATZ you are flying near?
- stay with LARS (assuming you aren't actually going inside or very near an ATZ), and rely on LARS (and your pre-checking of NOTAMS) to tell you of stuff to beware of?
I mean: how close do you need to be to an ATZ to call them, rather than staying with LARS?