Does an external GPS help with position?

[Spinnerb8]

I have an external gps puck already mounted at the bow of my boat. I believe it went to a 360 unit that the previous owner of my boat had. I had it plugged into my 1199 even though it had internal gps. I purchased a helix 10 mega DI gps unit to mount at the bow. Should I just remove the external gps or just plug it in ?

[Hollada]

If it’s not a heading sensor puck it’s not going to do much for you at the bow. Your bow screen will jump all over in any orientation other than north up without a HS puck at less than .6 mph. You’ll also see a circle icon and not your boat. The unit doesn’t know which direction your pointing unless moving at greater than .6 mph.

[Wayne P.]

If the GPS antenna is the AS GPS HS that came with the 360, that has a heading sensor. That shows direction when you are going too slow to get a Course line. It stabilizes the Chart View in those conditions. The GPS part would not add anything extra that a bow unit with internal GPS antenna would provide.