Ok Here's my problem. Water depth readings are all over the place, especially the numbers after the decimal.
Depth readings were fine with my 797 that was mounted at the console. This year I purchase a 798 and mounted it at the console with a transom mount and moved the 797 to the front of the boat with a trolling motor mount. Both units have the same issue with water depth.
I have tried running one unit at a time, turning off all other electronics, moving the unit from the console to the front of the boat, turning on and off the TVG and adjusting the filter. I also replaced the trolling motor transducer from the SI to the XNT 920 T.
Both units have the newest software.
Help…………..