Zero line is very wide
I am trying to fish in shallow water and the ZERO line is very wide. Is there anyway I can reduce that line.
The wide "Zero" line could be caused by a couple of things. If your sounder is a dual frequency sounder try using the 200kHz mode. If the sounder has a clutter control or TVG (Time Varied Gain) try adjusting them. They will reduce the sensitivity near the surface. You can reference your operator's manual for setting procedures. If neither of these work you will need to contact an Authorized Furuno representative.