Do I need all of it to work? I don't have a lot of room in the boat so, if I can get the radar display to interface with the GPS that would be a plus since I could then use the radar display as a chartplotter and use the Garmin combo unit as the stand alone sonar orrrr I suppose I could just mount the GPS for the Raymarine out of the way in the cuddy.
Im sure that will work as long as there capable to interface.If you have to mount it in the cuddy id try to mount it where i could see it from the helm,thats if you have the space.