:? My depth readings lock up to random values between 10 ft and 25 ft. I use a DST-800 transducer and display on a MFD12, an FI-503, an FI-50 "MULTI", and MaxSea software. Even without the NavNet turned on, using only the FI-50x displays, the values lock up. If I cycle the power to the instruments, the readings will someties return to valid values, but often not. It seems to be much worse when in shallow <10 ft water. The problem is geting progessivley worse and began about a month ago. Any and all input in resolving this problem is welcome.