Dragonfly 5 Pro with Nav+ Does Not Display Sonar Chart Data

[TimK]

Chuck, thanks for the welcoming.

Previous to my posting this issue, I had already upgraded to the latest Dragonfly software. My MFD came with 12.09 and I updated it to 12.20. As per the update instructions, I backed up my waypoints to another microSD card, then I downloaded 12.20, installed it and restored my waypoints verifying that my MFD's microSD memory card reader can both read and write.

The good news is that your suggestion to erase all Navionics data through the Chart Installer app and to download/install the nautical and sonar charts for several states worked! For every lake that I checked I was able to display both nautical and sonar data with the sonar data displaying once I zoomed in to the 2000 ft level.

Just satisfy my curiosity, I used the Chart Installer app to again erase all Navionics data and tried to load the nautical and sonar charts for just one lake. Once again the sonar chart was blank and even the nautical chart for that specific lake had far less data then with the original nautical data that came with the Nav+ card. So then again I used the Chart Installer app to erase and downloaded a larger area (several states). As expected, everything worked fine.

Thank you!