i have the navionics hot maps 07 and 08 and both are great. they are real good detail maps and have every thing, if you have ever looked at the fold out fishing hot spots maps that are water proof. it is the same but with more detail and you can zoom in on a spot. it will also tell you what type of fish that are generaly found in aireas of the lake. great map you cant go wrong with it but get the 08 chip it is cheeper and has all the same stuff as the 09. hope this helps.

thanks
chuck