Maps for Hummingbird Ice Sonar

[millsboy79]

I got the ICE Helix 5 for Christmas and have used it a handfull of times but I will admit I am new to the sonar game.

I was hoping to get some tips / help on how to add bathymetry information to it. It says it comes loaded with 10000 US lakes, but that does not help me here.

Most of what I can find on this forum and others, says the available information is pretty crappy so I am just wondering what other people use with their hummingbirds?

If someone was so inclined to share their maps, is that even possible?

I apologize for my ignorance but that is just what it is I really am not sure "how it works" so any information you can give would be appreciated.

Thanks in advance.