Question for the Lowrance pros. I just bought a boat that came with 2 Lowrance HDS 7's. One has insight and the other does not. Do I need chips for both of these in order for them to work properly or do any of these have gps installed? Just curious what the difference is between the 2 units and will I be able to save waypoints on these units without chips? Any info would be great. Thank you all in advance.