I fished the Chip not to long ago with the Navionics but like CrappieMagnet says look around for a good map to compliment it. Navionics will put you right on the spot but it seems different maps seem to point out details that are missed by others. Missed "Hells Half Acre" thanks to the map but fished a nice mid lake hump and found my way back to the landing thanks to Navionics.