I have 3 G2N helix 12s. Two at console (one for mapping G2n DI and one mega SI G2nfor graphing). I have a g2n DI at the bow with 360. The bow graph is always reading in the 200-400 ft range and my 2d picture is not looking correct. Ex. It will say I'm in 300 ft (when I'm actually in about 15ft) and my lake bottom line will be be way the top and basically renders my 2d useless at the bow. I know how to use the units very well and have messed with the settings a bunch and still does it. What can the problem be? I thought I remember reading on here others had the same issue and that a software update for the new units is needed?