
I use shonky on a 760.Not familiar with the265 but with the 760 I have shonky on a sd car and plug it in when I go off road. That way I don’t have to keep changing the setup. You will need mapsource if you are doing any planning on the computer and to communicate with the GPS to transfer data..
If the track is not showing as a line as to where you have been you may have to turn that function on in the unit