It happened several times this summer but yesterday was extremely bad. I will be spot locked and fishing and then I look down at my Humminbird 798 HD and it shows me moving in a line in some random direction. Yesterday it showed me about 5 miles from my spot and then it says something about like, No GPS signal. Then you wait about 30 seconds and it is back to normal. Could I be getting interference with my terrova or something? Is there something wrong with my graph? Does anybody know of a solution to fix this? I am running the latest updates.
BTW, I am running this off of the internal antenna.