I have a GP-1850DF. I would like to be able to transfer waypoint data from my GP1850DF to my computer and vice versa. I have been told that a good software for this is easy GPS. I do not have a data card for this Furuno unit, and am asking if anyone can tell me what hardare i would need to transfer the data back and forth. I have a laptop, so i can bring it onto the boat and connect a cable between the Furuno and laptop. Need to know what type of cable would work. I saw a 7 pin connector cable that would connect to the DGPS port on the back of my Furuno, but the other end of the cable is just wires. My laptop has the following type ports. An ethernet, usb, hdmi, 15 pin serial port with 3 rows of 5.