Your Ipad must be a wifi/3g model. Even though you will not
be using the 3g, this ipad version has a GPS chip in it that will
use satellites for navigation.
Also check out an app called "HEMA" USA maps. It is
9.99 but it replaces the need for an Atlas. As to the
apple version of maps, I think it is better. However, if
anyone is so stupid to depend solely on any GPS to to
anywhere, they probably will have a bad outcome.