Apparently, there is a Fishing Range option on the Navionics app. It appears that you can have the system highlight ....say....10 feet to 3 feet...along a shoreline.
That is new to me but has been there all along. rich
A quote from a guy on another site..
"It's a great tool that I use on and off the water. I really like to use the fishing range map option to highlight depths this time of year for the bull reds."
p.s. Scott, sorry I didn't see your post until just now. Yes, it tracks your position. I can't solve the visibility issues, though. That is why they sell the more expensive chips I guess.