Quote Originally Posted by x racer View Post
I have a hummingbird 1197 with factory installed navaonics map in it. My question is can I put a lake masters chip in it and it over ride the navaonics ? And if I take the lake master chip out will the navaonics map come back.thanks for your help
X racer it sounds like you have a 1197c Si NVB unit.
Yes, the unit should automatically show the LakeMaster mapping data when you install the mapping card. However, you may want to make sure that is what it is showing you by setting the Chart Select menu to use that map card or you may want to show what the NVB data has on it without taking the LakeMaster card out. This can be manually set with this menu.