This the the Helix7 on my trolling motor. When I get to around 5 feet or so, the graph starts reading over 1000 feet and it stops scrolling.
I'm thinking it can't read in that shallow of water. My Helix 9 at the console does fine. I have also notice a differance of 5 to 10 feet differance between the two and I'm pretty sure the Helix 9 has the correct depth. My trolling motor shaft is only around 48" so their should not be that much of a differance, plus my transom transducer is mounted at the very bottom of my hull in the back so it should be at least within 2 feet at most in differance.
thanks for any help.