Navionics sent me an email today. I was having problems getting good contour lines with my navionics card. The best I could get is 10' contour. Navionics said that I should get better than that. So she told me I need to update my Hummingbird software and then Insert my card again, press the menu button twice. Select Charts tab, then go to CHART SELECT then select FISH N' CHIP. in doing this she was able to see way more contours. What the heck is she talking about? I have been through this Charts menu 100 times and I can't find FISH'N CHIP. I am running firmware 6.640 did I miss something?