First off I have a 998 and 788 interlinked with one GPS puck. Both units are 2010 models. The problem I have is that while trying to navigate to a waypoint, the arrow (represents the boat) is very slow to update, making it very difficult to get on a waypoint. When the units final do update you are either past the waypoint or going in the wrong direction trying to find it. Mainly the bow unit does this (788).
Any suggestions or help? What software version should I be running?
Thanks for the help.