I have a Helix 10 SI GPS @ the helm, and a Helix 10 Sonar GPS at the bow. Both have the current software versions, 1.210. I use Navionics + US & Canada cards in both, and both cards were updated Aug. 2016. I have both units set to shade water depth deeper than 20'. The SI GPS @ the helm works as intended. The Sonar GPS unit at the bow does not. The bow unit shades water shallower than 20'. I have swapped the cards back and forth, no change. All HB offered was to do a system default. That did not help either. Next recourse is to send the unit and mapping card in to HB. Anyone have a tip or two on what setting to try?
Thanks in advance,
Gregory