Just got my first GPS/Sonar combo and I'm playing with it in the garage trying to figure it out. Even the chip threw me for a loop...the thing is far too big for the port, then I notice a smaller chip can be taken out of the bigger one. It fits. What is the purpose of the bigger chip that holds the tiny chip that fits? After a phonecall to Scugog I begin to get this thing figured out. Man there are a ton of different regions on this thing. I thought it was just supposed to come with Trent Severn? Its got all kinds of other spots, including Elephant, Jack, Kashagawigamog, Chandos etc. Wonder if I was given the wrong chip? Also, when I went fishing with Scugog last week his unit (HDS 7) was showing us 1 foot contours. Looking at my unit its like 10 foot contours! I assume it gets better than this (if I read my manual) or is that what you get for a lower priced unit?