I had some trouble with our Lowrance HDS-8 a few months ago. When I called tech support they wouldn't talk to me until I had installed the latest software
upgrade (which I did, and the minor problem was resolved). However, I have since learned that by doing so, I now have a geofence embedded in my unit (that I definitely did not have before). We are about to leave for New Zealand
and if I had known this would happen, I would never have introduced the update. I even tried to do a downgrade, but I can no longer find the older software
on the Lowrance website. Any ideas would be appreciated!