www.bbcboards.net
This is the link to some very good info pertaining to either Humminbird or Lowrance units.
Scroll down in the general forums and you'll see the Lowrance or Humminbird forums. You'll also see the image interpretation forums where people post some really cool pics.
I hope this helps y'all. It sure helped me. I even created word documents so i could copy/paste the starting point settings then emailed it to myself, saving it to my phone so i had access to the settings while on the water.
Ronnie