My helix 7 SI works ok at 40 Ft. of water . But when I went out to 80 ft. it was blank . The SI and Bottom scan both were blank. When moving below 5 MPH and also anchored. I just checked the depth on advance settings and it was on Auto. I increased it to 200 ft. and will check it on my next trip.
But would like to see if it works now .
Is they anyway to check it to see if it will work at a deeper depth with out making a trip?