Some Navionics will work just fine. From what I understand you have to be careful because of the capacity of the processor in that unit. I'm not sure if the lakemaster will work with lowrance. If it would that is the one I would recommend. Sever guys I know who run low units really like the Insite mapping for our lakes. I have a Navionics premium and it's pretty good for the contour lines on our lakes but my lakemaster with its features is better in my opinion.
Proud Member of Team Geezer
Charlie Weaver USN/ENC 1965-1979