Wis, I read another thread here last night that stated that TN loads all the needed maps at the outset of the journey. I don't know the actual fact, though.
Last weekend I was in a pretty rural area with spotty BIS coverage from ATT. It comes and goes there. I used TN and GMM to check and view my location and TN worked fine over the period with no visible glitches. GMM was spotty and slow to download.
|