
Originally Posted by
Flogger
Thanks for the education Ricky!!! I now have an understanding on how my HB's GPS works. Too bad my 600 series isn't compatible with the antenna upgrade. I'm thinking about getting another HB unit with SI and moving my 688 to the bow of the boat. Will all of HB's new SI units be compatible with the GPS upgrade?? If so, will the external gps receiver be far superior to my 688? Thanks again Ricky!!