Before everyone tries to steer me to other brands, the main reason is I am currently running an Eagle Fishmark 480 in my tinnie and to have the option of interoperability with 2 boats (buying a Bigger Boat just for offshore). Been doing some research and the Transducer/power cable on my Fishmark 480 is exactly the same for the the following models of GPS Chartplot/Fishfinder units
So I would like some comments on who has used them and which units are considered good.
Fishelite 502c with internal gps aerial
Fishelite 640c external gps aerial
Fishelite 642c with interal gps aerial
Thanks for all replies in advance