What Raymarine autopilot is it, and is it connected via
Seatalk, NMEA0183, or NMEA2000? Any converters in the mix?
First, the Raymarine autopilot is ridiculously overaggressive about needing you to confirm everything. That said, it SHOULD only ask about waypoint changes, when you reach a new waypoint. But I have seen this before, and I think it is the result of the
chartplotter occasionally resending the same waypoint information. That is, it sends the waypoint and then all eh
navigation data needed for
steering. The autopilot steers via that data, and then the same waypoint is sent again. I am not positive of that, however.
The best workaround I am aware of is that Yacht Devices converters will recognize the AP asking for input, and send the enter key input automatically which effectively disables that idiotic feature of the Raymarine AP. This would
work if the AP is NMEA2000, and your
chartplotter had an NMEA0183 output.
Others have said that if you put the AP in
motor vessel mode instead of sail mode it disables it. I found that not to be the case, and it changed the response such that it didn't work well. But you could try it.