no
Matzilla is correct Johnson Outdoors purchased LakeMaster, Humminbird and Minkota and made all their products proprietary: But there are other options
Option 1
http://www.humminbird.com/Freshwater/Product-Category/Accessories/Cartography/Contour-Elite/Contour Elite is a computer version LakeMaster. They sell the DVD's by regions for about $150. You can add a USB - GPS to your computer for tracking.
Option 2
http://www.navionics.com/en/mobile-pc-app-1This is a "Boating App" you put on your smart phone, (android / iPhone etc) tablet, iPad - $9.95 per year. (they offer a high def version for $50/year but in my opinion not worth it.) You can try either for free for one week. Smart phones have built in GPS capability. They also have webapp with USA lake maps you can view your lakes on your compute. Just click on the webapp button (its free)
You download a region area from a US map (Canada and other areas of the world if you so choose). Keep the download area small unless you have a lot of data storage on you smart phone as all the selected map data is loaded on you phone. You can change the area at any time.
I bought a cheap 7" tablet (DigiLand) $40 which has built in GPS capability. It works very well. Tracking (refresh rate) is a bit slow, but Navionics is currently very aware of the issue and working on a fix per an email I received from their development team last month.
I did some overlays on some MN lakes comparing my Contour Elite and Navionics maps. They are extremely consistent to one another.
I believe over time Navionics contour maps will far exceed any other fishing contour maps in the future. The app allows you to create your own contours using several sonar units where the sonar and boating app are linked. I use the SonarPhone and it works great. You can select an option to sync our unit with Navionics who use your contour data to update their maps. Map updates are done almost daily and I have seen the contour I created show up on an update for a lake I spend a lot of time on.
