I fish a lot of tidal rivers and creeks and the Navionics+ chip I have only goes so far inland. There is still many and many miles of navigable waters to fish but no mapping. It looks like I am moving on dry land. Several years ago they made a Freedom map chip that would show some of these areas but it is not available anymore. Any suggestions on a mapping chip that is available that will show these waters? The units that I am currently using are Gen3 and Ti1. It will be mostly for the Ti1 unit.