The Navnet 3D does not appear to be sending route information to the auto pilot. I have erratic behavior because when a route is activated the boat may not always follow it. The Simrad auto pilot works fine in auto mode, but loses position in the follow route mode; NAV mode. In some cases when the boat follows a route it suddenly losses course information and begins to drift off course. If you dodge it is very difficult to get back on the route. Sometimes you can not get into NAV or sometimes the boat will severely over correct to get back on a route. The result is broad S turns until it finds its track. Seems to be a communication problem between the two units.