Greg, I'd rather be catching fish and know nothing about the electronics. Since I'm not able to go, I get to try some things to help us find a fish when we get on the water. Hopefully, by the time I get to the lake, I won't need to be digging out the manual.
I connected my handheld gps to the NMEA input on the 798 just to see what it would look like in the network. I'm not sure why it was grayed out, but it would let me select the hand held gps as an input on either unit. Gotta do a little more reading and maybe ask a few questions up in the SI forum.

